FAQ Knowledge Articles

Marvin does not recommend usage of an asphalt-based flashing in installation. In fact, usage of an asphalt-based flashing could negate the warranty.

The concern with asphalt-based flashing is that it will heat up and can melt part of the nailing fin which would likely create issues with the product performance.

This warning is spelled out in multiple window installation instructions (see close to the end like page 10 or 11), e.g. Clad Window Installation Instructions or Wood-Ultrex Installation Instructions.

For more information, see:

Window Installation Instructions

For additional support, call 1-800-533-6898.