How to Install Roof Trusses

how to install roof trussesInstalling roof trusses can be a tricky business. One person with lots of experience, building know-how, strength, dexterity and a dose of good luck might could pull off the job, but otherwise, plan on having at least one other helper, preferably more.

As you learn how to install roof trusses, one of the first things you'll realize is that it is important to get the roof closed and protected against rain and other types of damaging weather as soon as possible. However, you also don't want to get in such a hurry as to make mistakes that could result in terrible consequences (such as roof truss failure) on down the road from not properly mounting, positioning, and fastening the truss to the house.

Handling and Marking Anchor Points

Another critical part of how to install roof trusses is learning from the very beginning about their strengths, and their weaknesses. The strength in a truss lies in its vertical pressure resistance, not in any horizontal pressure. This means you don't want to lay the truss on its side against a wall or handle it any other way except from the top or bottom.

For homes higher than one story, you will almost certainly need a crane or levered ropes to get the truss to the top and in the correct position to avoid damaging it.

Mark anchor points every two feet (61 centimeters) to serve as guides as to where to affix the truss to the outside house walls. This important part of how to install roof trusses can save lots of work and help prevent you from having to measure once you're up in the air, where too much movement could be dangerous.

Measurements taken from the ground are also more likely to be accurate those taken up on top of a roof. Start installation at the end of the roof where the gable will be and continue from there.

Nailing Bracing and Installing Plywood for Fascia and Roof

Most pre-fab roof trusses come with one-by-fours used to separate them and hold the bracing of the truss in place. After you've finished anchoring the truss to the outside walls of the house, as part of knowing hot to install roof trusses, you need to know that these should be nailed permanently into place. The manufacturer providing the trusses should have these instructions included with the truss as part of the installation.

Although trusses provide the structure for eaves, you will still need to install the fascia. How to install roof trusses includes knowing this to help close off the roof and prevent rain, hail, or high winds from damaging the roof and house. Plywood roof panels should be installed at right angles to the trusses with joints offset.

Nail plywood-roofing panels every two feet (61 centimeters) between the trusses and use H-clips to attach the panels one to another. And with that you've learned some basic knowledge about how to install roof trusses. Remember though, that installing roof trusses, a fundamental part of building your house, needs to be done correctly, so even if it doesn't seem to make sense, take your time to do it right!

See Also:

Attic Truss Spans