How do you install rigid foam insulation on a concrete floor?

How do you install rigid foam insulation on a concrete floor?

Apply two coats of epoxy paint over the existing slab. The area should be clear of dust and debris. Install rigid foam insulation (XPS or EPS Type II) with the seams taped (see Figure 3). Install 1×4 furring strips at 16 inches o.c. and attach them to the concrete slab through the rigid foam insulation.

Can you spray foam a basement floor?

Simply put, spray foam insulation is the best way to insulate any basement, so why isn’t it used in every house? The Ontario Building Code is starting to mandate more continuous insulation in new homes. The main reason is the upfront cost.

How do you insulate a basement concrete floor?

If you have enough clearance in the basement to add a few inches of height to the floor, one of the most effective ways to insulate the floor is to first install a sheet of polyethylene as a vapor barrier over the concrete, extending it about three inches up the walls.

Do you need Vapour barrier with rigid foam?

Rigid foam insulation is usually a qualified vapor barrier. However, an installation between the studs can pose a challenge. To complete the vapor barrier you would want to foam-seal or tape all the sides where the rigid meets timber, because these gaps will facilitate vapor flow.

Should I insulate under basement floor?

Heat is also lost through the basement floor. Creating an insulation layer and a vapor barrier between the concrete slab and the ground beneath it is the best practice in insulating basement floors. The insulation barrier will help keep warm air in, and the vapor barrier will keep unwanted moisture out.

Should I insulate basement floor?

If a basement is being used for storage or as living space, it needs to be kept dry to avoid mold and dust mites. The most important strategies for keeping basements dry are those of groundwater and rainwater control. Basements should be insulated on their perimeters—they should not be insulated between floors.

How do I make my basement floor warmer?


  1. Locate Cold Spots With a Thermal Camera.
  2. Insulate the Rim Joists and Headers.
  3. Insulate the Ducts Leaving the Basement.
  4. Install Better Vent Flaps.
  5. Insulate Above-Grade Basement Walls.
  6. Make Sure First-Story Walls Are Insulated.
  7. Confine Utilities in an Unheated Space.
  8. Insulate Basement Ceilings Below Unheated Spaces.

Can rigid foam insulation be left exposed?

Q: Can FOAMULAR® be left exposed in interior applications? A: No. To comply with building codes, all foam plastics must be covered with a 15 minute thermal barrier.

What type of insulation should I use in my basement floor?

Basement floor slabs are best insulated underneath with rigid insulation: both extruded or expanded polystyrene have been widely used with success.