The History & Evolution of Roofing Underlayment

Felt, underlayment, tar paper… a rose by any other name.

You don’t see it. You don’t know its purpose. It's required by most building code authorities and shingle manufacturer specifications. What is it, really?

Roofing underlayment has been around for about a hundred years. Its creation and evolution, not to mention its purpose, has largely remained a mystery, even to many contractors. From the manufacturer to the roofer, everyone sells it as an essential component to their particular roof system, but why?

The following presentation documents the early days of the product and follows it into today’s applications and beyond.