Rigid Foam Insulation Under Tile

I had a quote from an insulation company to take down the drywall ceiling of the garage and insulation and replace it with spray foam for 2 000 00 gulp.

Rigid foam insulation under tile.

You can attach wood sleepers to the floor fill the gaps with rigid foam insulation and then apply your finish flooring. I m installing tile on a 3 x 5 area under the interior side of an exterior door in a bedroom yep the bedroom has a door to the outside. The rest of the bedroom floor is 3 4 oak which has already been installed and finished. Since this is way out of our budget i thought i could tackle the problem from the floor of the room since we have to replace the carpet.

Is the 1 2 adequate underlay going to be sufficient. Or as demonstrated here you can cover the slab with rigid foam insulation add two layers of plywood and then add the finish flooring. Foamular foamular 250 3 in. Foam board insulation is used on attics and walls yet it can also be used to insulate your floors.

This foam board insulation is the rigid pink or blue panels that can be found at home centers in many different thicknesses. Most people do not think about insulating their floors unless perhaps it s their attic floor. There are two ways to handle insulating concrete floors. The catch is i want to put tile down.

What i did in those areas was to put down 6 mill visqueen 1 high density styrofoam floor pad laminate flooring. R 15 scored squared edge rigid foam board insulation sheathing model 9gb view the owens corning basement and crawlspace insulation. I also raised the exterior doors 1 1 2. However there is a portion at the entryway that i would like to cover with ceramic tiles.

I believe 1 2 plywood over the 1 rigid foam will support hardwood flooring. The tile floor when finished will sit just shy of the oak floor by about 1 4 to 1 2. I left the floor in the laundry bath as it was with vinyl over concrete. Seal the joints with a sealing tape tyvek etc and then seal the bottom joint at the floor level and the top joint at the subfloor above with an expanding spray insulation foam use the one you would use for a window installation.

If not what can i use to insulate plus finish this. The combination of the forced air furnace insulation on the floor has made the room very livable in the winter. Eps is used under roofing over foundation walls and beneath siding. It provides an r value of 4 per inch of thickness and is the cheapest type of foam board insulation.

I was then going to tapcon a perimiter of 1 x 2 to match the height of the rigid insulation boards on the concrete floor in the rooms and screw the plywood sheeting to those boards over top of the rigid insulation. But insulating your floors is a good idea for many reasons including energy efficiency and height adjustments.