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What’s Your Opinion On Building With Green Timber?

Asked by Joseph on March 09, 2017

What’s Your Opinion On Building With Green Timber?

Answered by Derek Folsom

Good morning Joe,

I would say that about 75% of the projects we do are green timbers.  The other 25% are air dried. We have in the past, but do not do any kiln dried projects.  Well that’s not entirely true, occasionally there will be a commercial project that calls for KD, and in those instances we will have it kiln.  By spec definition, a dried product is somewhere in the 19% moisture content range, and we find that the Douglas Fir timber that we use, once they’ve been milled, shipped, prepped for fabrication, cut, packaged and shipped, are right around the 19% mark.

For timber framing, most material orders are a-la-carte. There are some pretty standard sizes 6×8, 8×8, etc., but each project calls for something different than the last, and in order to fill those needs, we have to have suppliers and mills cut everything as the order is made.  That being said, we have some suppliers that have timbers stocked, on “stickers”, which allows the product to dry before it’s sold, but that is not the norm.

You will find that denser woods, i.e. Oak, will never dry the way a Doug Fir or Hemlock will, so over time, as the moisture gradually dissipates from the timber, it is more apt to checking, twisting, etc.  All timbers are going to check over time. One way to reduce checking is by using free of heart material.  When you think about the rings on a log, the heart is the center of the bullseye, also referred to as sap wood.  On larger species, like Doug Fir, we’re able to get sticks that are free of the heart (bullseye), and that wood is less susceptible to checking and blemishes.

Here is a link to our site that explains expected blemishes, and free of heart material. 

I hope you find this helpful,

Derek

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