Ice and water shield is a type of roofing underlayment that provides an extra layer of protection against water infiltration. It is commonly used in areas with cold climates where ice dams and snow buildup can cause water to seep under shingles and into the roof deck. In this blog post, we’ll explore what ice and water shield is and how it works.

What Is Ice and Water Shield?

Ice and water shield is a self-adhesive membrane made of rubberized asphalt and a layer of high-density polyethylene film. It is designed to stick to the roof deck and create a watertight seal that prevents water from seeping under shingles and into the roof structure. Ice and water shield is typically installed in areas of the roof where ice dams are likely to form, such as along the eaves and in valleys.

How Does Ice and Water Shield Work?

Ice and water shield works by creating a barrier between the roof deck and the shingles. When water flows down the roof, it can collect at the edge and form an ice dam. If the shingles are not properly sealed, water can seep under them and into the roof structure, causing damage to the insulation, framing, and ceiling. Ice and water shield prevents this from happening by providing a watertight seal that extends several inches up the roof deck and under the shingles. This means that even if water gets past the shingles, it will still be prevented from entering the roof structure.

Benefits of Ice and Water Shield

There are several benefits to using ice and water shield on your roof. Firstly, it provides an extra layer of protection against water infiltration, which can save you from costly repairs due to water damage. It also helps to prevent ice dams from forming in the first place, by creating a barrier between the roof deck and the shingles. Additionally, ice and water shield is easy to install and can be used with a variety of roofing materials, making it a versatile choice for homeowners.

In conclusion, ice and water shield is a type of roofing underlayment that provides an extra layer of protection against water infiltration. It is designed to prevent water from seeping under shingles and into the roof structure, and is commonly used in areas with cold climates where ice dams and snow buildup can cause water damage. By creating a watertight seal between the roof deck and the shingles, ice and water shield can help protect your home from costly water damage and prolong the lifespan of your roof.