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SailinAway · 07-24-2021, 09:11 PM

Alright, here's another product: GAF Storm Guard, $87 for 200 sq ft.

https://www.lowes.com/pd/GAF-STORMGU...yment/50353100

It's supposed to be for wind-driven rain.

I'm using GAF Timberline HDZ shingles on the whole house. Don't forget that shingle companies prefer that you use their underlayment for the warranty. I admit I'm looking for a cheaper alternative to Grace Ice and Water Shield. I'm not sure my humble Taj Mahal is worth Grace IWS.

07-24-2021, 09:11 PM	#18
SailinAway Senior Member Join Date: Apr 2019 Posts: 991 Thanks: 256 Thanked 280 Times in 169 Posts	Alright, here's another product: GAF Storm Guard, $87 for 200 sq ft. https://www.lowes.com/pd/GAF-STORMGU...yment/50353100 It's supposed to be for wind-driven rain. I'm using GAF Timberline HDZ shingles on the whole house. Don't forget that shingle companies prefer that you use their underlayment for the warranty. I admit I'm looking for a cheaper alternative to Grace Ice and Water Shield. I'm not sure my humble Taj Mahal is worth Grace IWS.