The WinterGuard™ Series of waterproofing shingle underlayments are applied under roof shingles during new construction or re-roofing to protect your home’s interior from winter leaks caused by ice dams and wind-driven rain.

WinterGuard is a composite material of asphalt polymers, formed into a rolled sheet. The asphalt provides the waterproofing. The polymers make the asphalt elastic and sticky, all the way through the sheet. The result is an amazing ability to both stretch and cling. This means that WinterGuard doesn’t rip when stressed and seals around nails driven through it. It sticks to a clean roof deck like glue. And it won’t dry out during the warranted lifetime of an asphalt shingle system. The result is a waterproof barrier beneath your shingle system, which pooled water and wind-driven rain cannot penetrate.

WinterGuard waterproofing shingle underlayment is installed between the roof deck and the shingles, creating a weather-tight barrier that prevents backed-up water from getting into your home.

Ice dams -- nasty build-ups of ice and snow -- form from freeze-melt cycling on your home’s roof deck. When the ice and snow melt, trapped water can seep through the roof, damaging the roof deck, insulation and the interior of your home.

WinterGuard waterproofing shingle underlayment is installed between the roof deck and the shingles, creating a weather-tight barrier that prevents backed-up water from getting into your home.

WinterGuard HT (high tack, high temperature) is specially formulated to resist high roof temperatures under metal roofs. Also for use with shingles and tile.