STEP 5: CLOSURES

Foam Closures

 

 

Foam closures are an important part of a metal roofing system because they seal the gaps

created by the panel profile. When installed at eaves, ridges, and transitions, they help keep

out wind-driven rain, snow, insects, and debris while still allowing the roof system to perform

properly.

 

In roof valleys, expanding foam plays an even bigger role. Valleys handle large amounts of

water, and expanding foam helps fill irregular gaps and seal hard-to-reach areas where water

can otherwise work its way underneath the panels.

 

Using the correct foam products helps improve weather resistance, reduce drafts and moisture

intrusion, and protect the roof from leaks in high-risk areas.

How To Calculate Foam Closures

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Foam closures are used to seal the gaps created by the panel profile, preventing water, snow, insects, and debris from entering the building.

 

When calculating foam closures, consider both the eaves and the ridge of the roof. For the panel closures at the eaves (inside closures), measure the full length of each eave where the metal panels start. Foam closures are installed continuously along these edges.

 

For ridge closures (lp2 or outside closures), measure the full length of all ridges on the roof, and multiply by 2. Foam closures are installed beneath BOTH sides of the ridge cap to seal the panel profile along every ridge.

 

It’s recommended to allow a small amount of extra material for cuts and fitting, especially on complex roofs.

How To Calculate X-Seal

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X-Seal is used in valleys to provide a watertight seal where two roof sections meet and direct water flow. It is installed along the length of each valley, underneath the valley trim.

 

To calculate X-Seal, measure the full length of every valley on the roof, following the slope from the eave up to the ridge or transition point. Add all valley lengths together and multiply by 2 to determine the total amount of X-Seal required.

 

Because valleys experience heavy water flow, X-Seal should be installed continuously with no gaps. Allowing extra length for overlaps, cuts, and proper sealing is strongly recommended to ensure long-term performance.

Our Team Is Here To Help

Getting this right isn't always easy - our team has years of experience and will happily assist with any questions regarding your project!

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