Bath remodel-proper sequence of flooring installation
Hi.
I’m into a complete (down to the studs and original subfloor) remodel of our small bathroom (8′ x 6′).
The flooring we’ve chosen is a waterproof sheet vinyl (.1″ thk) to cover the entire floor. I’m at the stage where we’ve removed the old cast iron and enameled corner rectangular tub to be replaced with a new acrylic/fiberglass reinforced tub.
I need to place two sheets of subflooring (3/4″ and 1/2″) to get back to the height of the door’s threshold ( and, no, I’m not removing the threshold so let’s not go there).
After those are down I’m rolling out the vinyl sheet on top of them.
Should the vinyl sheet go under the tub or up to it? I’m leaning toward under it by only 2″ or so ( so not fully under it). The tub is being installed onto a mortar bed which will be on top of the two sheets of new subfloor. I’d rather not go up to the tub with the sheet vinyl because I don’t want to have to cut that edge of the vinyl perfectly and then glue it to the floor and caulk it to the tub because I just KNOW that over the years that edge may just eventually release and I’d have to keep dealing with it. I like that the tub will help hold it down.
The tub, btw, is a 2 flanged/2 integral skirted acrylic/fiberglass rectangular tub that installs into a corner of the room against two walls.
Also should I put down any #15 felt or vapor retarder or the like on the house’s subfloor before or between the two new subfloor sheets? And should I put anything under the sheet vinyl?
My house was built in 1952 and has the diagonally laid 8″ wide planks across the floor’s joists. There are many gaps between the those boards due to shrinkage in width. We can see into the cellar below through those gaps.
Thanks in advance for any advice.
Replies
Under the tub sounds good. I’d skip the felt. You’re doing all that work you sure you don’t want to tile the floor?
No tile. No need for future grout cleaning and maintenance besides the work to tile plus making sure the floor is even and flat etc. No constant vigilance for cracks in the seams or tile or grout. The sheet vinyl, I've used before, and you just roll it out and your done. No fuss no muss. Waterproof. And they come in lots of styles, patterns, and colors. No brainer in my opinion.
In general, you never want a vapor barrier sandwich. Water which will, (and sooner or later it will) get between the layers will have no place to go.
Remember to moisten the ply under the mortar bed before laying the mortar. This will help the ply pull less moisture out of the mortar for a more even cure.
No tile.
Sheet vinyl.
I recently remodeled my bathroom with same plank subfloor, we ripped it out and replaced with advantech. But it sounds like you tore out 1 1/4 worth of old floor?? Wow.
I would just lay the vinyl wall to wall in such a small room. Why does the tub need a mortar bed?
When working on a bathroom remodel, especially with considerations for flooring and subflooring, here are some pieces of advice:
Placement of Vinyl Sheet under the Tub:
It's generally a good idea to extend the vinyl sheet under the tub by a small margin (around 2 inches, as you mentioned). This can help ensure a watertight seal and prevent water from getting under the tub, which could lead to issues over time.
Installation of Vinyl Sheet:
Make sure to follow the manufacturer's recommendations for installing the waterproof sheet vinyl. This may include using adhesives and seam-sealing methods to ensure a secure and water-resistant installation.
Subflooring Layers:
Placing two layers of subflooring is a good approach to achieve the desired height. Ensure that the subfloor layers are securely fastened to the joists to provide a stable base for the vinyl.
Vapor Retarder:
Considering the age of your house and the gaps in the existing subfloor, it's advisable to install a vapor retarder between the original subfloor and the new subfloor layers. This can help prevent moisture from reaching the new subfloor and causing potential issues over time.
Addressing Gaps in Diagonally Laid Planks:
Before installing the new subfloor, consider filling or sealing the gaps between the diagonally laid planks. This can be done with a suitable filler or a combination of filler and mesh to prevent any air or moisture infiltration.
Subfloor Preparation:
Ensure that the subfloor is level and free from any debris before installing the new subfloor layers. A level and clean surface will contribute to a more successful and durable flooring installation.
Consider Professional Advice:
If you are uncertain about any aspect of the installation, consider consulting with a professional contractor or flooring specialist. They can provide specific advice based on the conditions of your bathroom and house.
Remember to follow the product-specific guidelines provided by the manufacturers of the materials you're using. Taking the time to properly prepare and install each layer will contribute to a successful and long-lasting bathroom remodel.
Given your situation, it is advisable to lay the vinyl sheet under the tub, leaving a small margin. This method provides a more secure and visually appealing finish, reducing the need for complex cuts and potential issues along the edge. While you can skip adding felt or vapor retarder between the new subfloor sheets, make sure to achieve a snug fit to prevent any gaps. To enhance insulation and address gaps in the old subfloor, consider placing a thin underlayment beneath the sheet vinyl. Best of luck with your bathroom remodel!
Hi there,
It sounds like you're tackling a comprehensive bathroom remodel, and I appreciate the detailed information. When it comes to installing the waterproof sheet vinyl in your bathroom, here are some recommendations:
Placement under the tub:
Considering your concerns about the longevity of the vinyl edge, it's generally advisable to run the vinyl sheet under the tub, even if it's only by 2 inches. This provides a cleaner look and ensures a more secure and stable installation over time. The mortar bed under the tub will help keep the vinyl in place.
Subfloor layers:
Placing two sheets of subflooring (3/4" and 1/2") to achieve the desired height is a good approach. Make sure these layers are securely fastened to avoid any flexing or movement that could affect the vinyl over time.
Vapor retarder or felt:
Given the age of your house and the gaps between the floor planks, it's a good idea to install a vapor retarder or felt paper between the house's subfloor and the new subfloor sheets. This helps to minimize moisture-related issues and provides an additional layer of protection.
Underlayment for sheet vinyl:
For sheet vinyl installation, it's common to use an underlayment to provide a smooth and even surface. A thin layer of plywood or hardboard underlayment can help bridge the gaps in the existing floor and create a more stable base for the vinyl. Ensure the underlayment is properly secured to prevent any movement.
Sealing gaps in existing floor:
Before installing the underlayment and vinyl, consider filling the gaps between the existing floor planks with a suitable filler. This will help create a more even surface for the underlayment and prevent any telegraphing of imperfections through the vinyl.
Remember, following the manufacturer's guidelines for both the tub and the vinyl flooring is crucial to ensure warranty coverage and optimal performance. Good luck with your bathroom remodel! If you have any more questions, feel free to ask.