How does WinterGuard waterproofing underlayment work?
WinterGuard is a self-sticking composite material of modified asphalt and glass mat, 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 seal. This means that WinterGuard doesn’t rip when stressed. It seals around nails driven through. It sticks to a clean deck like glue. And, it won’t dry out during the warranted lifetime of an asphalt shingle system. The result is a warranted waterproof barrier beneath the shingle system, which pooled water and wind-driven rain cannot penetrate.
