YesC Coaster said:
Ok. When I measure on twigs in other boards, they hold the same moisture as the rest of the board.Dowser4711 said:
What do you think about restricting the ventilation in the eaves just where the problem is? There's less around the entire property than just there in the picture. Where it is almost completely blocked, there are no discolorations and it is bone dry according to the moisture meter.
Seriously measuring! I usually just go up and look for leaks with a flashlight. If the timber has been there for 50 years, I wouldn't worry too much. I think few bother to go up and check. But is it that the specific plank you're measuring is colder and is attracting condensation? Winds that are too cold aren't good either.
Yes, as you say. It's been like this for the 10 years we've lived here. What I've actually considered is reducing the insulation in the attic a bit since I'm going to install a wood boiler with tanks as a complement for next winter. This should create an even better climate in the attic.Ulltand said:
I will wait until spring and then see how the moisture level looks.
No, that's probably true. The timber has been there since 1969 and was additionally insulated in 2011-2012. So, I suppose there isn't any urgent need for action. However, the problem is very localized, and it would be good to figure out what's causing it.Excel said:
I have now talked to dad.
It could be due to one of these two things.
1) For some reason, those rough-sawn planks were dried too quickly and harshly. In that case, they are dry on the outside but wet on the inside and will not dry out but continue to be wet inside. The harshly dried surface does not allow the inside to dry.
2) The roof is leaking, although it's less likely since the plank underneath is dry and the "wet" one is along the entire length.
Nothing to do about it except to replace the wet planks if possible.
It could be due to one of these two things.
1) For some reason, those rough-sawn planks were dried too quickly and harshly. In that case, they are dry on the outside but wet on the inside and will not dry out but continue to be wet inside. The harshly dried surface does not allow the inside to dry.
2) The roof is leaking, although it's less likely since the plank underneath is dry and the "wet" one is along the entire length.
Nothing to do about it except to replace the wet planks if possible.
Perhaps one can determine if it comes from outside or inside by temporarily covering a part with plastic (like construction plastic or a plastic bag) for a week or two, then remove and measure again. Higher moisture in the covered area = the moisture comes from outside, and vice versa.
Last night, we had -12 outside, -7 in the attic, and 80% RH. Today +2 and 82% RH in the attic, 95% outside.
When I went up and used the moisture meter, it showed 40% moisture level right next to the nail strip. Something really doesn't add up—wood can't change that quickly, could it be that my cheap meter is acting up?? I then went out and pressed the meter into the patio deck, which is absolutely soaking with water. It showed 35%....
Sure, the sheathing feels damp, especially the rough-sawn boards. But 40% moisture level is incredibly high, and a 10% increase overnight... Very strange, I must try to test with another more expensive meter too...
When I went up and used the moisture meter, it showed 40% moisture level right next to the nail strip. Something really doesn't add up—wood can't change that quickly, could it be that my cheap meter is acting up?? I then went out and pressed the meter into the patio deck, which is absolutely soaking with water. It showed 35%....
Sure, the sheathing feels damp, especially the rough-sawn boards. But 40% moisture level is incredibly high, and a 10% increase overnight... Very strange, I must try to test with another more expensive meter too...
Is it even possible to measure in these temperatures?