You manufacture your products to the highest standards. Unfortuantely they don’t always get installed correctly and occasionally fail. The Jamsill Guard is a time-tested, effective, and proven solution for preventing moisture damage from door and window leaks.

Jamsill, Inc. has manufactured the Jamsill Guard sill pan flashing for over 25 years and currently offers 8 common depths. We welcomethe opportunity to discuss custom depths, colors, private labeling, etc. with you to meet your specific needs. Please contact us at 800-526-7455. 

PREVENT Costly Damage

Jamsill Guard® works to provide barrier to protect door and window sills from water damage, dry rot and mold!

At YOUR Favorite Hardware Store

Jamsill Guard® sill can be found at many local Lumber and Building Supply outlets all across the USA and is also available online at You can also give us a call or fill out our contact form for personalized help locating our products near you.

Fast, Easy 2-STEP Installation

Jamsill Guard® use three piece permanently seamed together to form a water-tight sill pan to protect your home or project!