Roof Trusses

By Frank Vanderveur (reprinted from fall 2009 newsletter)

Frank Vanderveur

First of all, thank you for choosing me as a GLLCA board member. I hope to contribute my experience in the log building world as well as promoting the profession.

Looking back at building my own log home, I have some information to share. Before we started building, I considered a few different options on what roof system I should put on the log home. I chose the roof truss system to be made out of prefabricated dimensional lumber [2×6] and a log ridge pole with post, rather than log purlins and log trusses. I cut the plate log flat after using the laser to lay out our elevation. The ridge pole [64′] was on the ground for layout. I pre-cut the flats to receive the upright post and did the final flat cut on top of the ridge pole to receive the 2×6 on which the roof truss is to sit on later.

The 2×6 act as a spacer for future T&G in the ceiling. After cutting the tenons on the post and the mortises in the ridge pole, the final move was lifting the post and ridge pole up. After placing the ridge pole, we were ready for the roof trusses. These were pre-made for the whole house. Each truss had its own number referring to the drawing plan and the house. It went up fast and precise. In one part of the roof system they designed and built a re-enforced truss system [with several trusses], making it extra strong for a future log ridge accent piece. The depths of the trusses are 24”. This will give me a fascia of about 24”, which is too wide for me. To accommodate this I used a 9 ¼” I-joist starting at the gable end and working out.

Looking back at this procedure, I like the way everything was put together like a puzzle. It made it easy for the carpenters to install the roof trusses. The designing part took time to figure out, but with the assistance of the designer of the company, it was time well spent. There is plenty of room [2′] in the trusses for wiring [no drilling], light canisters, and two layers of insulation bats. Above the insulation there is plenty of room for air movement to the ridge vent.


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About gllca

The Great Lakes Log Crafters Association is chartered as a non-profit organization in the State of Wisconsin, USA. The Board President, Board Members, and Officers are elected by the general membership and serve as stewards for running the association
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