Building envelope solutions for managing moisture in low-rise wood frame construction.

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Solutions for Open Joint Rainscreen

The design concept relies on the performance benefits of a rainscreen, which is a gap behind cladding that facilitates drainage and drying.

The downside of the open joint design is that areas of the water-resistive barrier are left exposed to sunlight. Therefore, a black housewrap enhanced with UV resistance is a perfect component for an open joint rainscreen cladding system.


Open Joint Envelope Solutions Using Standard OSB Sheathing

System Details

For the primary WRB, we recommend using UV enhanced WRB that has an unprinted, tri-laminate substrate. Make sure to also incorporate system accessories like black flashing that is compatible with the house wrap and stays hidden once installed.

If using furring strips to attach the open joint panels or planks, consider covering the surface of the furring strip with black self-adhered flashing to ensure the furring is also invisible once installed.

Open Joint Envelope Solutions Using Pre-Weatherized Sheating

When using a pre-weatherized sheathing, like Huber's Zip System®, you can add a UV enhanced WRB that has an unprinted, black substrate in order to hide the preweatherized panels. The application is then exactly the same as if you were installing over regular OSB sheathing.

Product Details

WRB Layer
FlatWrap UV - Premium WRB

Strength & durability matter when it comes to protecting your sheathing. Stucco & masonry products have chemicals in them that can cause inferior WRB's and building paper to deteriorate overtime. FlatWrap HP is a tri-laminate wrap that protects the important water holdout film by sandwiching it between 2 layers of a premium non-woven wrap. Its durability can withstand the rugged installation that's typical of stucco applications.

Advanced Protection Details
HydroFlash UV - Black Self Adhered Flashing

Use HydroFlash for all of your window and door flashings needs. HydroFlash is an aggressive peel-and-stick self adhered flashing that out-performs other butyl and rubberized asphalt versions. The specially formulated bloc co-polymer can be applied to damp surfaces and installed down to 0° F.

HydroCorner - Pre-formed Sill Corners

HydroCorner Sill Treatment is an affordable option for protecting a window sill from moisture intrusion. Place one HydroCorner in each of the bottom sill corners, and then cover with a piece of HydroFlash for a quick and easy-to-install sill treatment.


The journey to protecting your investment starts here!

We have a passion for building better and want to help you determine the solution that's right for your project. Let us be your guide.

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