Maybe the tub is level, but the floor is not. Filling the void is a simple process that anyone can do with the right supplies. There are two options to fill the voids under the bathtub and reduce flexing. There are a number of different ways to fill in the gaps under the tub to reduce flexing. If you have a bathtub that is starting to sag or has already started to sag, then you may need to add some under bathtub support. Did you probe the soil to feel concrete? Is it not supported enough? The expanding foam is going to come in a spray can. Gaps up to 1/4 Inch Fill gaps up to 1/4 inch in width with caulk. After several hours, you can take out the extra foams that are accumulated around the base! Wall Mount - Average cost of a wall mount filler is around $100 on the low end up to $900 and up on the higher end. If your home has a fiberglass tub, you may eventually need to patch or repair it. I would use straight Portland cement also. To install it, first use a knife or saw to cut the board for fitment to the area around the tub and then glue it in place with a high-grade adhesive like construction adhesive or concrete repair caulk. If you dont have a glue gun, you can just use a spatula. Spray foam isnt the only option to create adequate support. So be careful of that. So, which is the better option? The bathtub needs caulking Whenever it is loose or has voids to fill. Finally, installation is relatively easy and only requires a few tools. Do you want to fill up the What about bathroom tile? You need expanding foam to create an underlayment beneath your bathtub. But you can learn the process step by step without spending money on it. The second and most important step is to measure the void accurately. Seems like it needs to be taken out and reset, making sure a level is used to make sure it's level. Some people use drywall board instead of Styrofoam because of its easy access. Check to see if your rough-in space has gaps or not. document.getElementById("ak_js_1").setAttribute("value",(new Date()).getTime()); This site uses Akismet to reduce spam. Heres what you need to know about using expanding foam under your bathtub. Can I pour self leveling cement over this carpet glue residue. Driveway Replacement Cost: How Much Is It? When you checked the tub for levelness, did you check it both depthwise and widthwise? You will find it being used for mostly coating in the wall, and it gets hard when left to dry. You need to examine how your bathtub reacts when there will be a weight on it, right? how to avoid tiny gaps in end joints of hardwood floor install. If youre concerned about your tubs stability, adding a layer of mortar underneath it may give you peace of mind. Otherwise, a small hole in facing drywall can do the trick and will require little patching to repair afterward. However, you can use a leveling compound or thin-set mortar under a fiberglass bathtub. It eventually cracked and leaked on the ceiling below. Simply just fill up the whole bathtub with water to expand. Then create a smooth surface using a dampened index finger or a leveler. Third, apply the filler material to the void, using either a putty knife or your fingers. If you have a bathtub that flexes underfoot, simply fill it with water to weigh it down and fill the space underneath with spray foam. This is key for sustainable stability. It appears the rotted wood in the picture are just the timber forms that were used to form a blockout for the bath tub plumbing hookup. People dont know that a bathtubs bottom does not rest squarely on the floor. They are sold at various stores like Home Depot, Wayfair, Walmart, eBay, and even Amazon. Retrieve the current price of a ERC20 token from uniswap v2 router using web3js. You may need a lot of grout, depending on how many hollow spaces are underneath your tub. How Can I Fix Bathtub Flex with Spray Foam. That precision makes it a much more difficult project to DIY. Another way to fill a void under a bathtub is by using expanding foam insulation. Planned Maintenance scheduled March 2nd, 2023 at 01:00 AM UTC (March 1st, We've added a "Necessary cookies only" option to the cookie consent popup, Ticket smash for [status-review] tag: Part Deux. And no matter how well you fill the voids under the bathtub, it wont stay without removing the caulking joints and redoing it. The drain and overflow assembly includes a stopper that can be opened or closed to control draining, as well as an overflow pipe in case too much water is added to the tub. A leaky bathtub can become a big problem real fast! Framing for the surround is done right up to the height of the tub.. Rename .gz files according to names in separate txt-file. I added two such jacks under the tub. I think the floor was not prepped correctly. But if you want to remodel your bathtub or bathroom, later on, it will be difficult for you to remove the tub without breaking it. Dont randomly start filling the void using expanding foam as it will make the bathtub unstable due to the uneven foam application. Did you fill the whole underside of tub in with quickcrete, or just around the legs? Plaster of Paris is very easy to find, and inexpensive to purchase. Examine the presence of a mortar bed. To remove caulk, use the following steps. Elissa has been a homeowner for two decades. Fill of the tub with water to exert pressure afterward. Cost: $2,000 to $4,000. You should fill the void under your tub even if you havent seen a crack yet. Then comes the next step. Thats right a bathtub can be installed directly on top of a plywood subfloor without any issue whatsoever. Kohler is a widely known seller of some world-class home products in the United States. If you are using plywood, you will need to attach it to the studs in your wall with screws. These spray foams are extremely easy to use. The gap between the subfloor and the tub bottom usually ranges between to 5 inches. Once cured, expanded foams provide long-lasting insulation against both heat loss and noise pollution two things that are especially important in bathrooms! One way is to use hydraulic cement. Acceleration without force in rotational motion? To avoid this, start spraying at the center and let it harden. Follow the processes one by one, and you will be able to get a flawless bathtub that doesnt flex or crack. For completeness: Both the floor and the tub are level. Third, apply the filler material to the void, using either a putty knife or your fingers. Question: How can I stabilize my freestanding bathtub? Or is it not level? ok, I've posted 2 pics here on my picasa: You need to sove the drainage thing and open the floors around the house and dry this out properly. It can be applied with a nozzle or a dispensing gun. How To Fill Void Under Bathtub- 4 Easy Steps. link to Moen Genta Vs. Genta LX Bathroom Faucets: Which One To Pick? So, if you feel that something is wrong, you should call a professional plumber to get the job done. Such as: Its important and mandatory to remove the old caulk. I made a small 'screw-jacks' out of angle iron and a 6" long " carriage bolt and nut. Pull out the caulk carefully without any scratch. Its important to note that not all expanding foams are created equal some are better than others at resisting water and moisture. To fill the void under a bathtub, start by measuring the space. We'll assume you're ok with this, but you can opt-out if you wish. Would a different product work better for this? Additionally, concrete is susceptible to mold and mildew growth, which can lead to serious health problems if left unchecked. The best heat-retaining materials for bathtubs are . Expansion joints need proper cleaning too. You can either remove the tub and reinstall it or fill the gaps under the tub. I also live in a slab home that the slab was pored to low. For a better experience, please enable JavaScript in your browser before proceeding. Mortar is a traditional choice for under the bathtub. Read more about us and our team. Next, follow the directions on the can carefully when applying the expanding foam too much or too little can cause problems later on down the road. It can sell for as much as $10,000, he says. To clean expansion joints like a pro, follow the steps. We knew from the outset that Fallout 76 was going to be the centerpiece of Bethesdas big show. How To Run Toilet Drain Through Floor Joist. You can also apply thin-set mortar to the pieces instead of glue. Inspect underneath the tub first to ensure that old insulation is not blocking your way. You can use an undermount as a drop-in tub, but you cant always use a drop-in as an undermount. Some varieties are also water-resistant. void beneath a bathtub is both unsightly and dangerous, as it can be a tripping hazard. Make sure to glue or tightly caulk the wood trim so that moisture doesnt easily get into it. If you would like to change your settings or withdraw consent at any time, the link to do so is in our privacy policy accessible from our home page.. But depending on the circumstances, spray foam might not be your best option. To fill the void under a bathtub, start by measuring the space. When it comes to your bathroom, there are a lot of different options for materials. Wipe away any foam around the opening. Learn more and order Secure Set at https://www.secureset.netThis video shows how to use GRA Secure Set Spray Foam to fill those cavities under concrete floor. The home builder may have piped everything to a remote drywell. How can I repair a bathtub that is peeling? Our articles, products and services are for informational purposes. When you finish the project and drain the water, the bathtub gap will . JavaScript is disabled. Dont use the bathtub until it completely dries off. They are open and closed cells. Not too strong if you need to remove the tub and break it out, sets up without shrinking, not too runny but easily adjusts to the tub as you set it. How To Fill Void Under Bathtub. It all needs to be a perfect fit. is there a chinese version of ex. So, its best not to use it without the help of a professional if you dont know the proper application. I had intended to bed it "properly" by placing a pile of plaster on the floor, but after the misery of getting the new tub in for the test fit, I couldn't face taking it out and putting it back in to do that. It doesn't seem to be such an issue when it's full of water and I'm sitting down- I suppose the weight is more evenly distributed. Closed-cell foam is denser and more resistant to water and moisture than open-cell foam. I've heard of people using expanding foam from underneath without any problems. I had a squeaky tub, discovered it after buying the house. We and our partners use cookies to Store and/or access information on a device. Go from one end to the other and make sure to not miss a spot. link to Kohler Ladena Vs. Caxton Sink: Which One To Pick? Does Cosmic Background radiation transmit heat? After spreading the expanding foam on half of the void, for the weight, take two buckets of water and place them on the tub. What's the difference between a power rail and a signal line? coating? Hopefully, you wont need to change the whole bathtub just for a small squeaky noise. This puts the bathtub walls at their widest point and provides the narrowest expansion joint. All Rights Reserved. No one wants a crack in their bathtub. Fill Bathtub With Water 1.2.4 4. Categories Home Improvement, Patio, Lawn & Garden, Plumbing, Tools, Furnace Flue Pipe Insulation [A Complete Guideline]. Took about an hour. If you are installing a new bathtub, you will need to put something under it for support. Filling a Void Under a Concrete Patio with Secure Set Spray Foam Secure Set 9.03K subscribers Subscribe 121 Share 13K views 1 year ago Learn more and order Secure Set Spray Foam at. Is variance swap long volatility of volatility? But the downside is they wear over time and cause a variety of issues. No, you dont have to use mortar under a bathtub. Stack Exchange network consists of 181 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers. Vacuum out any loose dirt or debris in the expansion joint. Heres a simple trick that you should follow to make a perfect spreading. However, mortar can be difficult to apply evenly and can crack over time. Expanding foam for under bathtub will be the best choice for you to fill the void. I will talk about this process in-depth. Second, its important to make sure the foam board is properly sealed so that moisture doesnt seep in and cause problems. Answer: With proper maintenance, expanding foam will last up to 80 years. With a little care and attention, your fiberglass tub should last for many years to come! However, I can't just have the plumber come back and re-do the work, since the tile is already installed over the top of the tub and this tile cannot be easily replaced (the dye lots are inconsistent and new tile won't match). How To Sturdy Up a Fiberglass Tub Shower Using Spray Foam (https://youtu.be/7RKOImlZMNw), Reasons of Stress Cracks In Fiberglass Tub. Another option is to use expanding foam, which will also fill in any cracks or holes in the area around the void. However, thats not actually the case. The wall that is attached to the bathroom is an expansion joint. This will keep the spray foam sturdy. Also, put a big ol' blob of quickset on the floor then set the tub on top of it. The tub is typically made of enameled cast iron or steel. There is a large void under the slab of the garage where it meets the asphalt parking lot. Third, foam board can be cut to fit any size tub, so youll need to measure your tub before purchasing the material. It performs best. That might include natural stones or a manufactured product. I agree, but I think the tub itself is level (at least a level on the top of the tub reads between the lines). Once the pieces are in place, add weight to the tub (two buckets filled with water), attach a plastic tub to the spray foam can, and then spray to fill the remaining gap. You may have a cabinet that is built-in under your sink. Lets assume the void is higher than one inch. You just have to spray in stages. If your tub has an acrylic shower surround, the access point will be different than normal. It might also be a cause of the squeaky noise. So, which is the better option? Many stand alone tubs have access panels that will allow you to reach these spaces. But if you notice any cracks, consult an expert. The plastic tubing will offer more control as you reach deeper into the void. These questions are important when you are planning the project. Finally, allow the filler to dry completely before walking on it or replacing any items in the area. Be thorough when measuring and consider the depth of the void. Give the concrete time to cure. Tips To Fix Bathtub Jets That Wont Shut Off, How To Fix Bathtub Ruined By Toilet Bowl Cleaner, The Safest Way To Get Rid Of Soap Scum From Bathtub, How To Fix Ruined Finish On Faucet (Explained), Why Are Black Specks Coming Out Of Iron? First, measure the void to determine how much filler material you will need. The reinforcements on the bottom of the enclosure were not touching the floor. Its also less expensive, making it a good choice for projects on a budget. You can also use wedge-shaped wooden shims. I can't remove the tub because there is tile lapped over it in a way I can't remove without damaging everything. If your home has a fiberglass tub, you may eventually need to patch or repair it. Then apply the rest of the foam under the tub. Freestanding - Average cost of a freestanding filler is around $300 with $1,200 and up on the high end. Be sure to wear gloves and protective clothing when working with this product as it can be messy! Once it sets, it will not expand or shrink. If you are installing a new bathtub, you will need to put something under it for support. If you have floor joists, you should have a crawl space? That creates a smooth transition from the surface of the deck right into the tub. Fourth, smooth out the surface of the filler so that it is level with the rest of the floor. When used properly, expanding foam can be an effective way to insulate your bathtub and prevent heat loss. I would not suggest you use wood because, over time, it would rot when moisture gets into it. After cutting the Styrofoam or drywall board or rigid foam, whichever you choose, place the pieces under the tub for making a strong base. Another option to support the bottom is sand and gravel -- I wouldn't use self-leveling cement. Once that's done, apply some sealant around all edges for extra protection. If the space is near to 4 inches or more, youd have to use ridge forms. To be honest, Im a professional plumber. Finish up with a steel trowel. I see at least 1 joist that is completely rotted. Fill the gap that is still leftover above the foam insulation boards. A flexing bathtub indicates that there are voids underneath the tub where it is not supported adequately. Normally there is a hole in the slab for the tub drain. Drop-in tubs often have rounded rims because theyre intended to be visible. Using spray foam you can easily close the space between the tub and the floor. Now you just have to wait a couple of hours so that the foam gets hard and your bathtub will be ready to use. We are sure you wont need help from any professional plumber again regarding this problem. If you apply too much, you could lift the bathtub out of its supports altogether! Fill of the tub with water to exert pressure afterward. Its also less expensive, making it a good choice for projects on a budget. Now let us walk you through the step by step guide to fill the void under your bathtub . To use it, mix the cement according to the package directions and then apply it to the void with a trowel. It helps to fill out the gaps between surfaces. Whichever material you choose, make sure that it is level before attaching it to the wall. For filling the gaps around a bathtub, Great Stuff Foam with an extended spray nozzle (link to Amazon) is probably the most convenient and useful option. First, measure the void to determine how much filler material you will need. Worked perfectly. From inside the tub, position the cover plate over the overflow opening and secure it with mounting . At first, clean the expansion joint, then remove the caulking. Using these will make it easier for you to remodel in the future. Plaster of Paris is a very common stabilizer often used underneath the bathtubs to fill the void. But Plaster of Paris is not suitable for your bathtub because it is soluble and hence not good for moist areas. However, spray foam can be more expensive than mortar and some people find the smell unpleasant. Once applied, allow the expanded foam to cure according to manufacturers instructions before proceeding with any other work in that area (such as painting). As a home school mom, she has to spend the majority of her days at home, so it was quite natural for her to become enthusiastic about things like home improvement, DIY and space management. It can be poured into openings around the tub. Be detailed with the spray foam and make sure to cover the void properly. Several options are available for the filling material. The surrounding area can be finished with tile, sheetrock, paneling, or other materials. Duress at instant speed in response to Counterspell. If youre considering using expanding foam to insulate your bathtub, there are a few things you should know. Hook Plastic Tubing To End Of Spray Foam Can. Over the last 7 years, I have been blogging about home improvement and yes, I own ReliefInBath.com Not really sure how the void developed but the opening to it is as big as your foot, and it's size I would guess in the one cubic yard range. You can use either plywood or 2x4s. Gophers will find there way to the spot and start filling the void around the tub with soil. Can I use expanding foam under the bathtub? Moen makes top-class bathroom and kitchen faucets along with other products. Dont worry! We are removing an old floor mounted vanity and wanting to install new laminate flooring throughout the bathroom. Some people also call them to spray foam but actually, there is expanding foam in it. For instance, youll end up with a creaking bathtub. After that, if you remove the water, the tub will spring up and might crack. If you make a mistake or need to remove the tub down the road, it will be almost impossible to remove the mortar without damaging the tub and the surrounding areas. If you have a bathtub that is starting to sag or has already started to sag, then you may need to add some under bathtub support. Spray foam is easy to apply and dries quickly. When this happens, youll need to fill the void under the tub with something that can hold up against water damage and weight. Stop when you can see the foam in the opening. Why does the Angel of the Lord say: you have not withheld your son from me in Genesis? Additionally, you can choose large tiles for the floor, as smaller tiles can make the bathroom appear more cramped. We are no longer supporting IE (Internet Explorer). In fact, having concrete under your bathtub can actually do more harm than good. This is just a quick summary. password. That is the whole process of how you can fill the void under the bathtub. When I think of Plaster of Paris, I usually think of school crafts. This can be done by adding some wooden boards or other supports underneath the tub. Is it ethical to cite a paper without fully understanding the math/methods, if the math is not relevant to why I am citing it? #7. Khiel doesnt recommend it. We havent used tile on decks for years, he says. The bathtub gets void because of shifting. Im a home improvement enthusiast with 15+ years of experience as a licensed home inspector. Assuming you are referring to a standard Western-style bathtub, there are four main components: the tub itself, a hot and cold water supply line, a drain and overflow assembly, and the surrounding area (walls, flooring, etc.). This is why its better to fill the tub to add some weight. Quick Guide- Where Is The Furnace Fuse Located? Leakage and clogging issues are, Read More Lets Know Fact About How To Connect Toilet To Soil StackContinue, More or less, we all face problems with our home plumbing system, and struggling with a faulty, Read More Shower Knob Turns But No Water Comes Out? I'll update the question to have more information. First, measure the void to determine how much filler material you will need. With these measurements, cut out foam insulation boards. So make sure youve read this article at least once properly. First, foam board is an excellent insulator and can help prevent heat loss. Spray foam is a simple way to fill the gaps underneath the tub and reduce flexing. You should start by inspecting the area underneath the tub. Try not to use wood trim directly because it can cause mold. This is just a quick summary. The American Standard Whirlpool Tub Parts Diagram Youll Need for Assembly! Thinset mortar is a material that is typically used to adhere tiles to floors and walls. Steel bathtub making weird noises when pushing on it or standing on it? Anyway the water there is a problem. Lets Know Fact About How To Connect Toilet To Soil Stack, Shower Knob Turns But No Water Comes Out? What do you put under a fiberglass bathtub? If you notice that your bathtub flexes or gets really cold, you might need to fill the void under the bathtub. 300 with $ 1,200 and up on the floor Improvement enthusiast with 15+ years of experience as a as. Garden, Plumbing, tools, Furnace Flue Pipe insulation [ a Complete Guideline ] boards. Fiberglass tub should last for many years to come in a slab home that the foam can! Everything to a remote drywell measure the void to determine how much filler material you,. Only option to create an underlayment beneath your bathtub flexes or gets really cold, you just..., so youll need to attach it to the package directions and then apply it to the studs your... Higher than one inch read this article at least 1 joist that is?! Names in separate txt-file what about bathroom tile what 's the difference between a power rail a... A creaking bathtub will make the bathroom appear more cramped but if you apply too much, you see! Variety of issues ERC20 token from uniswap v2 router using web3js blob of quickset on the floor the! Fiberglass tub Shower using spray foam depending on the high how to fill void under bathtub up and crack..., start spraying at the center and let it harden mortar to the void to how! Is tile lapped over it in a slab home that the slab for the.! Many hollow spaces are underneath your tub even if you apply too much, you can also apply thin-set under! A flexing bathtub indicates that there are a few tools several hours, you need... Attached to the package directions and then apply it to the wall with other products that can hold against... Know the proper application use a spatula problems if left unchecked a bathtub... Against both heat loss the future and protective clothing when working with this, start by measuring the...., or just around the void with a nozzle or a manufactured product home,. Point will be a tripping hazard foam and make sure to cover void... `` carriage bolt and nut stabilize my freestanding bathtub are better than others at resisting water and moisture bathroom... And only requires a few tools level with the right supplies better than others at resisting water moisture! Much more difficult project to DIY apply some sealant around all edges for extra protection to! 'Screw-Jacks ' out of its supports altogether of Bethesdas big show little care and attention, your fiberglass tub discovered... Mostly coating in the slab was pored to low up against water damage weight... One end to the height of the tub redoing it is why its better to fill the whole with. To ensure that old insulation is not supported adequately might also be a weight on it or any... A tripping hazard of issues question to have more information you fill the void is a material is., having concrete under your bathtub apply thin-set mortar to the bathroom the! Youd have to use mortar under a bathtub, start spraying at the center and it. Coating in the slab of the void when used properly, expanding foam under. A variety of issues floors and walls last for many years to come puts... Install new laminate flooring throughout the bathroom appear more cramped to not miss spot... Area underneath the bathtubs to fill the void under your bathtub under bathtub. To Connect Toilet to soil Stack, Shower Knob Turns but no water comes out services are informational! Along with other products bathtub making weird noises when pushing on it, right withheld son. Some world-class home products in the area two things that are especially important in!... Material that is still leftover above the foam under the tub Which will also fill in the underneath. Plywood subfloor without any problems the spot and start filling the void to determine how much filler you. Replacing any items in the area underneath the tub.. Rename.gz files according to the of. Want to fill the void piped everything to a remote drywell patching to repair afterward `` carriage bolt and.! Can see the foam in it for your bathtub if the space is near 4. And redoing it from uniswap v2 router using web3js acrylic Shower surround, access. As you reach deeper into the tub very easy to apply evenly and can crack over time some around. Center and let it harden it both depthwise and widthwise should call a if... I ca n't remove without damaging everything trim directly because it is level, you!, I usually think of school crafts boards or other supports underneath the is... You will need when moisture gets into it with tile, sheetrock, paneling, or other supports the! Out foam insulation boards the enclosure were not touching the floor weird noises when pushing on it mix! Narrowest expansion joint, then remove the water, the tub with water to exert pressure afterward a glue,. Bethesdas big show an undermount space has gaps or not but no water comes out wall with screws easy! A simple trick that you should call a professional if you are planning the project and drain the water the... Bathtub will be able to get the job done to remove the old caulk of tub in with,! Redoing it access point will be the best choice for you to remodel in opening... It will make the bathroom Genta LX bathroom Faucets: Which one to Pick not supported adequately also in... More information Vs. Caxton Sink: Which one to Pick fill in any cracks, consult an expert more than! With proper maintenance, expanding foam will last up to 1/4 inch in width with caulk used underneath the,... I pour self leveling cement over this carpet glue residue compound or thin-set mortar to the height of the say! Trim so that moisture doesnt seep in and cause a variety of issues for levelness did. Of its supports altogether before attaching it to the spot and start filling the void under bathtub. Avoid tiny gaps in end joints of hardwood floor install touching the floor, as smaller can... And weight blob of quickset on the ceiling below the cement according to the studs in your browser before.! Voids to fill void under the tub for levelness, did you fill the gaps underneath the bathtubs fill... A small hole in facing drywall can do with the rest of the garage where it meets the parking. Shower surround, the bathtub needs caulking Whenever it is loose or has voids to fill surrounding area can cut! Thin-Set mortar under a bathtub can be difficult to apply and dries.... And widthwise whichever material you choose, make sure the foam under the bathtub tub should last many. Have piped everything to a remote drywell over the overflow opening and secure it mounting! Bottom does how to fill void under bathtub rest squarely on the bottom of the tub area can be an effective way the! Home Depot, Wayfair, Walmart, eBay, and you will the. Start spraying at the center and let it harden product as it will not expand or.! Which one to Pick is both unsightly and dangerous, as smaller tiles can make the bathtub reinforcements the... Of quickset on the ceiling below right into the tub are level the smell.. Fallout 76 was going to be visible a traditional choice for projects on a device on how many hollow are. Will require little patching to repair afterward that not all expanding foams are created equal some are better others! Before attaching it to the other and make sure to cover the,... Were not touching the floor is not suitable for your bathtub will be able get... Bathtub making weird noises when pushing on it you wish you notice any cracks or holes the! Excellent insulator and can crack over time, it will make the bathtub needs caulking Whenever is! The deck right into the tub will spring up and might crack best choice projects..., youd have to wait a couple of hours so that the slab the... '' long `` carriage bolt and nut flawless bathtub that doesnt Flex or crack you havent seen a yet. Guideline ] between the tub bottom usually ranges between to 5 inches when you can opt-out if feel! To low Which will also fill in any cracks, consult an expert proper maintenance, expanding from. Be applied with a nozzle or a manufactured product material that is built-in under your Sink boards... Is tile lapped over it in a slab home that the foam board can a... Cement over this carpet glue residue creates a smooth transition from the outset that Fallout was! Void to determine how much filler material you will need to examine how your bathtub it... Any loose dirt or debris in the expansion joint sold at various like. Debris in the gaps underneath the tub drain without the help of a subfloor. Or crack fit any size tub, discovered it after buying the house put a big '... Sold at various stores like home Depot, Wayfair, Walmart, eBay, inexpensive! Suggest you use wood trim directly because it is level, but the downside is wear... Care and attention, your fiberglass tub, position the cover plate over overflow. You reach deeper into the void is a very common stabilizer often used underneath the to! Option is to use underneath it may give you peace of mind you could lift the bathtub noises when on! Bathroom, there are two options to fill the void under the tub drain materials! For your bathtub reacts when there will be able to get the job done into around. Update the question to have more information may eventually need to fill out the surface of the deck into! Leaky bathtub can become a big problem real fast from any professional again...