Interior Insulation System

INTERIOR FOUNDATION INSULATION SYSTEM

The average year-round ground temperature in Ohio is 56 degrees. Properly insulation your foundation can have a simple payback in as little as 6 years. We install Dow–DuPont Styrofoam on the interior and exterior of foundation walls.

The reasons we use Styrofoam are simple.

  1. Styrofoam on the interior of your foundation wall will not absorb moisture the way fiberglass and other products can, causing wet insulation that can mold, mildew, and lose up to 70% of its thermal efficiency.
  2. Styrofoam is a rigid board that will not sag or droop over time.
  3. Furring strips can be directly attached to the Styrofoam making drywall installation faster and less expensive.
  4. If you choose not to finish your basement, you can leave the Styrofoam exposed. It does not need a fire code (drywall) covering.
  5. Installing Styrofoam from footer to grade covers that critical area from grade to top of wall with a continuous layer of insulation. This system also complies with the “Zone 5 Continuous R-10 Foundation Insulation” code.
  6. Sytrofoam can be installed over the top 2 Feet, 4 Feet, or the entire wall as shown in this drawing.

LIQUID ASPHALT RUBBER MEMBRANE WATERPROOFING

Interior Dow Styrofoam Insulation R-5 or R-10

This Diagram Illustrates Our Waterproofing System with Footer to Top of Found

STEP 1:

Install exterior waterproofing from footer to grade per manufacturer’s specifications

STEP 2:

Install Drainage Plane System on interior footer as shown in this drawing. This system allows any water that may enter behind the Styrofoam to drain to the below floor drainage – stone system and will not allow the water to drain onto the basement floor.

STEP 3:

Install Dow Styrofoam from top of Drainage Plane System to top of foundation wall.

STEP 4:

Install below floor insulation (optional).

STEP 5:

Tape all seams with Dow Weathermate Tape (optional).

R-10 meets the 2019 Code Requirement for “Basement Wall R Value, R-10 Continuous” Climate Zone 5.
ESR-2142 No Thermal Barrier or Ignition Barrier Required for Dow Styrofoam up to 2” Thick

Dow Styrofoam does not need to be covered with Dry Wall and can be left exposed in basement.