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Help with timberframe treatment

Started by Flekoun, July 15, 2021, 03:14:17 AM

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Flekoun

Hello everyone, I need a help with a timber frame treatment. I am going to erect a timber-frame greenhouse soon and I have few questions.

1) As the wood is currently green and without any treatment, should I first treat the wood and then erect the building or should I do it after the building is standing? Is it dangerous to expose the frame to the weather/rain before it is treated?

2) What treatment would you recommend for a greenhouse? As the timbers will be constantly in high humidity I thought of something like Norway/Sweden Wooden Tar which used to be used to threat Viking ships. Or should I use something more conventional like modern paints/stains?

I am using European Spruce for the frame.

Thanks for your advices!

PS: Do you think it is needed to use some kind of protection tape to seal the Sills sitting on concrete foundations agains the moisture?

Don P

You do need a moisture break between the timbers and the foundation.
Pine tar is a traditional finish and seems to work well. Heritage oil finish is a modern jazzed up, and thinned down, finish based in part on that. Green timbers in direct sunlight is a recipe for heavy checking and movement. Make sure the glass can float independently of that distortion. My personal feeling is that a breathable finish helps moderate rapid surface drying in exposed places like green timbers in sunlight, so it helps reduce the surface checking some. Finishes on green wood are somewhat sacrificial, they don't adhere as well and the wood is moving a lot.

Iwawoodwork

It would bee good if you could post in your profile where you are located as that question always comes to mind when seeing a new posting.

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