jean63 wrote:Gregconstruct wrote:If I understand correctly, even if a wood is known to be rot-proof, it is still useful to treat it ???
No ! the red cedar which covers my MOB has never been treated, it is there since 23 years; it's just an aesthetic problem. It's clear that I'm not going to have fun brushing oil on 250 m2 siding ....... just a kick from time to time on the darkest places and he finds his color. Maybe a little stain after karcher next time, on the blackest parts (little surface). The red cedar is perfectly rotproof like the larch (see the old chalets in the alpine villages, you must know if you go climbing there?).
It is true that some woods seem rotproof, like larch, red cedar, cypress swamps. In Louisiana, there are houses that are three hundred years old and have their feet in the water of the Mississippi Delta (Atchafalaya River). But, in fact, no wood is really eternal. So feeding it is almost always a good idea. As the wood dries, it is good to replace its lost water with fat. This is how the wood retains its flexibility and resistance. As for leather, if you do nothing, it ends up drying too much and cracking, while, well fed, we can give his climbing shoes to small children. In short, maintaining the wood is always profitable. For red cedar, it is recognized that this wood is hyper durable, very light, very easy to work, a nice color. Unfortunately, it is rare in the Americas and its importation is difficult, expensive and dangerous for its species. So, the red cedar today, in France, it is not so much more possible.
To avoid having to paint square meters, if you are too old or clumsy, for example, you can very well actually Karcheriser first, then deposit the oil with a spray, like manual machine for the treatment of fruit trees. Otherwise, you can pay someone with a Check-Employment-Service or even hire a specialized company.
Linseed oil is well known. But it is dark and dyes the wood. In addition, for the beginning of the treatment, it remains insufficiently fluid to penetrate the wood in depth. Better, at first, a fine and penetrating oil. Then, it's the opposite, we'll look for a penetrating fat or wax. I did the shutters at my parents' house with linseed oil. Annual chore early and then rare, say every five years. After 40 years of this treatment, the shutters are dark but as new, and the wood has become hard as stone. We feel that it will not be necessary to change them sooner. In short, they will be one hundred years old and always impeccable. PVC can never say the same (photonic aging) and maintenance-free aluminum (oxidation).
See you next, amigos.