December 11, 2018

Why Retrofit With Spray Foam?

Many people do not realize that eliminating air leakage is important to achieve energy efficiency, while eliminating condensation thus preventing mold, mildew, and moisture in the building.

How spray foam can improve your home

  • Prevent Ice Dams
  • Stop Drafts
  • Prevent Mold & Mildew
  • Increase structural support

Where to Retrofit?

  • Attics
  • Crawlspace(s) or Basement
  • Rim Joists
  • Exterior walls
Ice Dam caused by conventional fiberglass insulation, which allows moisture to enter inside

Moisture Flow

Water vapor usually moves from areas of high vapor pressure to areas of lower vapor pressure (Hot -> Cold). The difference in vapor pressure from inside to outside, often causes the air to pass through the walls of a building. By using spray foam as a vapor barrier this moisture flow is controlled.

R-Value

R-Value is the measure of resistance to heat flow. Each brand and type of spray foam offer a different R-Value, and are published by the company in the ESR/Code Compliance Reports.

Building MaterialR-Value Per Inch
Steel0.004
Concrete0.1
Wood1.0
OC Average4
CC Average7

Heat loss is an important factor to keep in mind, as a product with a high R-Value may not provide a continuous seal like spray foam does.

This shows that more foam applied will create a higher R-Value, but also succeeds in preventing heat loss. *Hot air hits the wall and shows heat escaping from left to right*

What R-Value do you need?

Based on 2012 IRC