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What You Might Not Know About Timber Roof Trusses

Timber roof trusses are large and open spans of roofing frames, as opposed to what is called post and beam construction. Post and beam construction uses standard-sized beams and studs to create roof joists and rafters, and these joists and rafters are then covered with drywall and other such materials. Trusses are often left open and exposed, for an elevated or cathedral ceiling, and for a rustic look to the home. If you're having a new home built, and especially if you're building a vacation home and want it to have a rustic look, note a few considerations you might keep in mind about timber roof trusses.


Timber roof trusses are very sturdy and reliable. Old barns and some long-standing homes have been made with timber trusses, because the wood and the design itself are both so durable, and these structures can easily last for generations. The density of the timber used for trusses also makes them a poor host to rodents and insects, as well as excessive moisture and humidity, so they're not likely to rot or need treatment for termites over the years, also adding to their longevity.


Over time, the timber used for trusses might change colour and tone. This is because wood naturally changes its colour over the years and because roof trusses are often treated with what is called Tung oil. This oil keeps the wood from becoming brittle, but it can also encourage the wood to develop a slight patina over time. This can add to the aged look of your home and bring in lots of charm and character!

Note, too, that steel can often be used to connect timber trusses; this might be to add support to larger trusses, or steel plates can be used for purely decorative purposes. These plates and their oversized rivets can tone down the look of the wood and bring an industrial and modern touch if you're looking for the open feeling of timber trusses but don't want a style that is too rustic in your home.

What is a thermal barrier?

You may have heard that timber roof trusses save you money on your utility bills because you don't need thermal barriers in the home. This refers to interior walls that might cut off the flow of heating and air conditioning from one space to another, which then results in you having to turn up the furnace or air conditioner. By allowing you to eliminate these thermal barriers, your home may then be more comfortable and more cost-efficient.