Hi. My extension was made with heat treated wood that's supposed to last for 20-25 years. It's now 11 years old and looking a bit dry. I'm not sure what's best to paint it with - hopefully just a water-based, clear, wood preserver. Any hints, tips and advice would be welcomed. Thank you.
Wooden clad extension - what to use for preservation
- Thread starter pooksahib
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What wood is it? A building that I worked in was cedar and designed to generate it's own coating
Hi. The plans stated Larch but in the back of my mind I think Cedar may have been the only wood available at the time. The brochure given to me is from 'thermowood' and there are indeed some maintenance instructions. It says that the wood will last for many years without the need for surface treatments but that weathering can cause cracking and the potential for algae growth.
They say to use stain for softwoods - either translucent or opaque. No mention made of water or oil based.
Is my picture enough to allow anyone here to say whether I need a treatment or not? And if I do, any suggestions as to the best brand/type of stain?
Thanks again.
They say to use stain for softwoods - either translucent or opaque. No mention made of water or oil based.
Is my picture enough to allow anyone here to say whether I need a treatment or not? And if I do, any suggestions as to the best brand/type of stain?
Thanks again.
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you seem to have shiplap. On mine, I previously mostly used a water-based shed-and-fence stain, but I blasted that off a few years ago with a power washer, and treated with linseed oil which seems to be lasting well. I used a spirit-based wood dye first, to try to blend it in with nearby "mahogany" stained doors.
On sunny days, it smells pleasantly of cricket-bats. You have to apply it thinly and not let it lie on the surface. Rub off excess with a rag if it has not soaked in after ten minutes, or it will go gummy.
I believe you can buy cedar oil to treat cedar cladding, it is an orangey colour. Seldom seen in UK now. Cedar is a naturally oily timber and I suppose it restores the content that has weathered away.
the shed and fence stains leave a waxy water-repellent film when new. If you neglect it long enough to start weathering away, it goes patchy and shabby, especially if a dark colour.
On sunny days, it smells pleasantly of cricket-bats. You have to apply it thinly and not let it lie on the surface. Rub off excess with a rag if it has not soaked in after ten minutes, or it will go gummy.
I believe you can buy cedar oil to treat cedar cladding, it is an orangey colour. Seldom seen in UK now. Cedar is a naturally oily timber and I suppose it restores the content that has weathered away.
the shed and fence stains leave a waxy water-repellent film when new. If you neglect it long enough to start weathering away, it goes patchy and shabby, especially if a dark colour.
The end grain and knot formation suggests it is scandinavian redwood (pinus sylvestris).
It could well be thermowood -if it is then you could leave it natural weathered grey as it is.
UV from the sun kills off any lignin in the wood surface, so a stain is needed to provide new colour.
As John says avoid the cuprinol ducksback type stuff, it sits on the surface.
If you want to stain to put some co,our back in, I would recommend
Its sprirt based but pretty low odour.
https://www.barrettinepro.co.uk/25/266/nourish-and-protect-wood-protective-treatment
Also available from toolstation.
Certainly natural oils like linseed work, but they dont have UV protection so they tend to get burnt off quickly.
It could well be thermowood -if it is then you could leave it natural weathered grey as it is.
UV from the sun kills off any lignin in the wood surface, so a stain is needed to provide new colour.
As John says avoid the cuprinol ducksback type stuff, it sits on the surface.
If you want to stain to put some co,our back in, I would recommend
Its sprirt based but pretty low odour.
https://www.barrettinepro.co.uk/25/266/nourish-and-protect-wood-protective-treatment
Also available from toolstation.
Certainly natural oils like linseed work, but they dont have UV protection so they tend to get burnt off quickly.
What about the Oslo oils with UV protection ? Pricey, but the best oils to use on the market imo
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