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Asphalt-impregnated felt — aka tar paper — enjoyed a 100-year run as the preeminent roofing and siding underlayment.
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While some old pros are sticking with organic felts because they're low-priced and breathable, many are moving to synthetics for greater flexibility
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Proper taping technique is key.
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NovaSeal underlayment is lighter and stronger than felt and provides better coverage, says maker
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Surround SR Underlayment is a waterproof synthetic polymer that’s 40 percent lighter than 30-pound roofing felt — as well as more durable and slip-resistant and less prone to tearing, says the maker.
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The Delta Footing Barrier is a three-ply impermeable membrane that goes on top of freshly poured footings before the foundation is built.
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Roll roofing was the wrong material for the flat roof under this second-story deck.
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In the Seattle area, where I work, we get a lot of rain. From the mid-90s to the mid-2000s, there were many high-profile cases of water damage caused by improperly detailed siding, mostly on condos and other multifamily housing.
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Grace Ice & Water Shield HT provides the same protection against ice dams and wind-driven rain as the company's standard underlayment - but it's made with an adhesive that is unaffected by temperatures as high as 240°F, the maker says.
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IB-3 StormStopper is a self-adhering (50-mil-thick) mineral surface underlayment that can be used to protect trouble spots like valleys and rake edges or the entire roof.