I am planning to build a simple fence and was thinking of using 45x70 pressure-treated timbers NTR AB. I thought I’d make it easy and drive these directly into the ground. Is NTR AB sufficient? I'm counting on it lasting at least 10 years, I know there are better options but let's disregard that; the question is how well NTR AB holds up. Does it make a big difference to tar the part that will be in the ground?
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· Göteborg
· 11 244 posts
NTR A should be used when they are to be driven into the ground. I don't know if this is what you mean by "better option." Is it that you have a larger quantity of NTR AB lying around?
I was just thinking that it's easier to get hold of AB in slightly thinner dimensions and it might work reasonably well anyway. I know of a gärdesgård with completely untreated juniper and spruce posts that are over 30 years old but are starting to give a bit now. Considering this, NTR AB should be able to last for at least a decade, or is the quality of the pressure-treated wood that poor that it won't hold?
Suggest using untreated heartwood for the posts instead of pressure-treated wood. In that case, burn the tip with a propane torch until it's black-brown but not charred (just lightly char the surface). Then coat the tip with pine tar to a good bit above ground level once it's installed. You can treat the top with 'Roslagsmahogny', as well as the rest of your fence (untreated wood). It requires a bit more work, but it's not more expensive and lasts much longer than even NTR A.
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