JointFlash

Designed to make your life easier

JointFlash™ is a fast, easy-to-install flashing solution that slides conveniently behind siding and stays securely in place as you nail, eliminating the need for on the job cutting. JointFlash improves the durability of fiber cement and wood siding, with all sizes aligning with best practices for James Hardie and LP SmartSide products.

REQUEST A SAMPLE
JointFlash being installed with James Hardie lap siding.

INSTALL IN 3 EASY STEPS!

Hardie lap siding before the application of JointFlash.

Step 1:

Install the first pieces of lap siding without nailing the end near the butt joint.

JointFlash being applied to James Hardie lap siding.

Step 2:

Simply tuck the piece of JointFlash™ behind the loose end of the previously installed siding. Make sure the JointFlash™ is centered on the joint and is overlapping by at least one inch.
Hardie lap siding after installation with JointFlash

Step 3:

Install the remaining piece of siding and nail down the butt joint as usual to hold the JointFlash™ securely in place.

JointFlash was designed by professional siding contractors to save you time and money, without sacrificing quality.

Whether you’re working on residential homes, multi-family units, or commercial projects, JointFlash provides the best protection and quality finish you need.

With JointFlash products, you’re not just installing siding—you’re reinforcing the integrity of every build. Our solutions offer long-term defense against the elements, ensuring siding looks and performs at its best for years to come.

Why Choose JointFlash?

JointFlash is an efficient and affordable solution for flashing both fiber cement and wood lap siding, including brands such as James Hardie, Allura, Tru Exterior and LP SmartSide.

Save time on your Lap Siding joint flashing with JointFlash

Saves Time
& Money

Designed by professional siding contractors, JointFlash will save time and money compared to using traditional trim coil.

Protect against moisture.

Advanced
Moisture Protection

Effectively seals siding seams to prevent water penetration, reducing the risk of mold, rot, and structural damage.

JointFlash is durable, meant to withstand harsh elements.

Durable & Flexible
Design

Our JointFlash products are made from high-quality, tear-resistant materials that adapt to natural siding expansion and contraction.

JointFlash is extremely easy to install with LP or James Hardie siding!

Easy
Installation

Designed for quick and hassle-free application, saving contractors and builders time on the job.

Nationwide Availability, Trusted Performance

DOWNLOAD THE JOINTFLASH BROCHURE

REQUEST A SAMPLE

For all questions or to request a sample, please complete the form below and a member of our team will be in touch.

This field is for validation purposes and should be left unchanged.
Name(Required)
Address(Required)
Would you like to receive JointFlash samples?
opt in(Required)
See Latest Posts