Business Details
43 Years
experience
Trusted Sill Pan Flashing Solutions for Homeowners & Contractors
Founded in 1983 by Gregory A. Moffitt and Glenn E. Brown, Jamsill has dedicated over four decades to solving water damage issues around doors and windows. Our patented Jamsill Guard system was developed through collaboration between a builder and a plastics engineer to address persistent industry challenges. The product's innovative design combines adjustable multi-piece construction with permanent PVC bonding to create durable, watertight protection. Headquartered in Southern Oregon, we've expanded from a 1,200 sq ft workshop to a 6,500 sq ft facility while maintaining our commitment to quality manufacturing. Our team continues to refine the product's sloped weep design and installation process, ensuring optimal moisture evacuation and structural protection.Available through major retailers like Lowe's and building supply outlets nationwide, we provide both DIY-friendly solutions and professional-grade systems. Our in-house injection molding capabilities at Dedicated Plastics enable strict quality control and production efficiency. With over 40 years of field experience, we offer technical support and personalized assistance to help customers implement effective water barrier solutions. Our focus remains on preventing costly damage through reliable, code-compliant sill pan technology that meets evolving construction standards. Through continuous improvement and customer-centric innovation, we maintain our position as industry pioneers in sill pan flashing systems.
Services
Sill Pan Installation
Water Damage Prevention
Door Sill Protection
Window Sill Flashing
DIY Home Solutions
Details
- Year established: 1983
Highlights and features
- We've specialized in sill pan technology for over 40 years since our 1983 founding
- Our patented multi-piece design allows on-site adjustability for perfect fits
- We use high-impact ABS plastic that resists deterioration and corrosion
- Our system creates permanent watertight seals using professional PVC bonding
- We offer nationwide availability through major building supply retailers
What people say
Effective water barrier
Easy installation process
Durable construction
Code-compliant solution
Services
Jamsill Guard System
Our patented three-piece sill pan system creates watertight protection for door and window installations. The adjustable design accommodates all rough openings while maintaining structural integrity. Made from high-impact ABS plastic that resists deterioration, our system features sloped weep areas for efficient moisture evacuation. Professional contractors benefit from fast installation while homeowners achieve professional results without specialized skills.
Water Damage Prevention
Our products form a permanent barrier against water intrusion at critical entry points. The system prevents dry rot and mold formation by channeling moisture away from structural components. Designed to meet modern building code requirements, our solutions protect both residential and commercial properties. The durable construction maintains effectiveness through seasonal temperature changes and weather extremes. This proactive approach avoids costly repairs from water-related damage.
DIY Installation Support
We provide user-friendly products that empower homeowners to complete professional-grade installations. The two-step process requires no special tools or expertise, making it accessible for all skill levels. Detailed instructions and technical support ensure proper installation for lasting protection. Our system's simplicity maintains structural integrity while eliminating guesswork. This approach saves time and money while delivering reliable moisture barrier performance.
People
Gregory A. Moffitt
Co-Founder
Gregory A. Moffitt, a builder by trade, identified the need for better sill pan solutions in 1983. Leveraging his construction expertise, he collaborated with a plastics engineer to develop the original Jamsill Guard system. His practical approach to problem-solving established the company's focus on real-world construction challenges.
Glenn E. Brown
Co-Founder
Glenn E. Brown, a plastics engineer, brought technical expertise to Jamsill's founding team. His material science knowledge enabled the development of durable, corrosion-resistant products. Together with Moffitt, he created the patented bonding process that ensures permanent watertight seals. His engineering background established the company's commitment to technical excellence in product design.
Questions
What is the Jamsill Guard system?
The Jamsill Guard is a patented three-piece sill pan system that creates a watertight barrier beneath doors and windows to prevent water damage.
How does the installation process work?
Our 2-step installation involves assembling adjustable components and permanently bonding them with PVC cement to create a custom-fitted moisture barrier.
Where can I purchase Jamsill products?
Our products are available at major building supply retailers nationwide and online through platforms like Lowes.com.
What materials are used in construction?
We use high-impact ABS plastic that resists deterioration, corrosion, and maintains structural integrity through weather extremes.
Is professional installation required?
While designed for DIY use, our system meets professional standards and is widely used by contractors seeking reliable moisture protection solutions.
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Reviews (1)
Ryan Mallory
Sep 11, 2019
Report
Top notch manufacturer of door and window jam flashing that is easy to install, always fits well, fast, durable, and effective for decades. Architects and building companies find great satisfaction and cost efficiency in labor and product. homeowners get peace of mind and can find it in Home Depot.
