Ice And Water Shield Entire Roof

Water and ice shield on entire roof bad idea.

Ice and water shield entire roof.

The situation was a slate roof on a 120 yr. From hud path best practices guide. Ice and water shield the whole roof. Ice and water protector sometimes also referred to as ice and water shield is a waterproof roof underlayment membrane developed to protect vulnerable areas on a roof from ice and water damage.

Both products have a separate purpose. The guy also talks about how the ice water shield seals itself around roofing nails which helps to distinguish it from a traditional underlayment product e g. Underlayment typical 15 tarred felt underlayment provides back up protection against water intrusion only as long as the primary roofing material. The arguement that oh i would hate to be the next guy having to remove the ice and water shield couldn t you just remove the shingles leave the ice and water down and then put new ice and water on top of the old.

A roofing material can be vapor permeable or the roofing assembly can be vapor open such as any type of shingled roofing which leaves gaps between layers. The video shows you exactly what ice water shield looks like and where it s installed. I just recently asked grace about this. Old brick firehouse currently used for dead storage by the town i think one small room is heated but not the whole building.

And they were talking about putting on i guess ice and water shield. In the video it s been installed on the entire roof. And the question was to what extent do you need ice and water shield on the roof. Tar paper roofing felt thermoplastic polyolefin etc or cheaper.