Comments on: Roof Ice and Water Shields & Underlayment: What You Need To Know

By: Dave Law

Dave Law — Tue, 19 Nov 2019 19:10:13 +0000

Hi David,
No, we do not recommend ice and water shield as a temporary roof, it is not meant to be exposed to weather.
~ Dave

By: David Anderson

David Anderson — Tue, 19 Nov 2019 01:49:08 +0000

Do you not recommend ice and water shield as a temporary roof for a low slope roof section that will receive a modified bitumen roof over a tapered insulation system

By: Dave Law

Dave Law — Sat, 16 Nov 2019 19:09:10 +0000

In reply to Antonio.

Hi Antonio,
We would recommend following your local building codes. Ice and Water Shield is usually only required in certain climates.
~ Dave

By: Antonio

Antonio — Fri, 15 Nov 2019 23:47:28 +0000

Hi, I’m from Bahamas and I’m building a new home and was really considering using ice and water shield over the entire roof. We normally use felt here in the Bahamas, is it there that big of a difference between the felt and ice and water shield?

By: Dave Law

Dave Law — Mon, 21 Oct 2019 15:33:01 +0000

In reply to Patricia Mounce.

Hi Patricia,

Yes, we highly recommend waiting for the roof to dry before adding another layer to it.

~ Dave

By: Patricia Mounce

Patricia Mounce — Mon, 21 Oct 2019 01:37:51 +0000

contractor put ice and water shield over entire roof (double wide home) and it has been pouring rain for 3 days. A metal roof will be installed. Should we wait until the roof dries? We’re almost in winter snow season.

By: Dave Law

Dave Law — Tue, 08 Oct 2019 15:17:16 +0000

In reply to Jean.

Hi Jean,

In a perfect world with perfect attic ventilation and zero chance of moisture entering the attic space, either as vapor or liquid, it would be “OK” to use full coverage.

However, due to the fact that attics are subject to condensation and the possibility of material breakdown and therefore moisture entering the wood substrate it is recommended to only use ice and water shield in leak or ice damn prone areas. Roof decking will last and function best when allowed to breathe from both sides. Otherwise you are essentially creating a moisture trap.

Best practice is to be sure the attic is properly ventilated and balanced as well as insulated to code or better. Then use ice and water shield on eves, valleys and trouble areas. Always follow local building codes as well.

~ Dave

By: Jean

Jean — Mon, 07 Oct 2019 16:21:15 +0000

In reply to Dave Law. Dave, Why is it not recommended to cover the entire roof with the ice and water shield? Even in Minnesota?

By: Dave Law

Dave Law — Tue, 30 Jul 2019 15:20:18 +0000

In reply to Piper House. Hi Piper, We do not recommend putting ice and water shield over entire roof.

By: Piper House

Piper House — Mon, 29 Jul 2019 17:53:33 +0000

Hi Dave,
I was told that we should use an ice shield/ block on the entire roof of our 1920’s two story Bungalow with a 10/12 pitch and 4/12 pitch dormers.

Please give us your thoughts Dave?

Thanks,
Piper