GAF Deck Armor Installation For Asphalt Shingles

[@slydog7131]

It is breathable and also water resistant, but it is not waterproof. GAF specifically warns against using it for temporary weather protection. If water gets under the shingles, only ice & water shield will help since it is self-sealing. All other underlayments are penetrated by thousands of nails, and every penetration can leak. Asphalt felt is both waterproof and breathable. It does degrade over many years but no underlayment will save your roof if the shingles or penetrations are leaking. The most you can hope for is reducing intrusions during blowoffs.

[@steveinsbrook2479]

No Plastic cap nails? You used staples. Doesn't that void the warranty?

[@dougspry6278]

which is better gaf feltbuster or deck armor??

[@totoroutes5389]

In the video why is there an ice water shield at the lower end of roof deck?

[@mobleyMobley]

Always ice and water shield on first row and around penetrations, valleys

[@Brandon-no3vc]

Your supposed 2 go ice n water on top of underlayment