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Do I need roofing felt in addition to Grace Ice & Water Shield?

April 26, 2017addition felt grace Ice Roofing Shield water

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Do I need roofing felt in addition to Grace Ice & Water Shield?

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Grace Ice & Water Shield self adhered underlayment should be used in all critical roofing applications. Depending on the climate, a full roof coverage with Ice & Water Shield should be considered. For the rest of the roof, Grace Triflex 30 can be applied as a water-shedding roofing underlayment, except for the cases of full Ice & Water Shield coverage.