Preventing Truss Uplift Cracks with Truss Backing Angle

When cold weather comes through, it can often cause the top chords of a truss-rafter roof assemblies to expand, and the bottom chords to arch up in the center and pull away from any wall partitions they’re attached to. That’s called “truss uplift,” and it can be a serious problem for newly constructed homes, breaking joint tape and causing ugly cracks where your walls meet your ceilings. If it happens, you can retape and refinish these areas, but don’t be surprised when it happens again next winter. Or you can start preventing truss uplift cracks from ever occurring in the first place by using a drywall accessory like Truss Backing Angle, like these forward-thinking drywallers we met in Highland Park, Ill.

In this edition of our “Jobsite Journals” series, we met up with Omar and Agustin Chavez from Power Drywall, Inc., who wanted to get proactive about truss uplift cracks before they crop up. When Agustin found Truss Backing Angle in the Trim-Tex catalog, he saw its potential and reached out to us to show him how to use it in a new single-family home they were building.

This Puts an End to Truss Uplift Cracks | Truss Backing Angle
This Puts an End to Truss Uplift Cracks | Truss Backing Angle

The Highland Park home, a straightforward residence featuring a single floor and a basement, is located in the enviable Hybernia community, surrounded by lakes and lush greenery. Of course, being in the Chicagoland area, the winters here can get brutally cold — your biggest enemy when it comes to cracks caused by truss uplift. Truss Backing Angle is a simple solution to this complex problem.

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Truss Backing Angle works like this: rather than screwing your ceiling’s drywall directly into your trusses, you attach Truss Backing Angle to the top of your framing members and screw the ceiling sheets into its rigid vinyl flange between the trusses. Now, when the cold air comes and those tress chords start to flex, they can do so independently of the drywall — no stress on the actual drywall means no unsightly cracks or gaps in the finish.

There have been steel products in the past that are intended for the same purpose, but the vinyl Truss Backing Angle is far lighter, far easier to work with (contractors have told us the vinyl flanges of the bead are much easier to start your screws into) and won't cut your hands up working with it. Not to mention, in a moisture-rich environment like this, vinyl won't rust like metal will. Add all this up, and a vinyl solution for preventing truss uplift cracks is a no-brainer.  

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Our kudos to Power Drywall for going the extra mile to make their customer happy with their home, preventing truss uplift cracks before they ever happen. Got a problem that’s been bugging you? Hit the button below to request a Trim-Tex catalog and the solution you’re looking for might already be contained within its pages, just like it was for Omar and Agustin Chavez!

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