Rotten roof?

[snowjim]

...

Very good input! If you can't see that it's leaking down on more central structures, it's very serious! However, you should have been able to see that the rafters were rotten from inside the attic, right?

 

[snowjim]

you don't see a difference between those that have been on the roof and one you've had in storage?
it's not always the thickness you think of when something thins out.

Yes? This is how I write:

If you look closely, you can see that those that have been on the roof are a few mm thinner, and that's also what makes the surface resemble sandpaper.

I've also pointed out before that moss and other things appear.

But how do you know when a tiile is finished? I've assumed it's when pieces start falling off or when they crack? Or when they are so fragile that you can't walk on them.

 

[irihenke]

Really? This is how I write:

If you look closely, you can see that those who have been on the roof are a few mm thinner, and that is also what makes the surface resemble sandpaper.

I've also pointed out previously that moss and other things can form.

But how do you know when a tile is done? I assumed it starts chipping off or when they crack? Or when they are so brittle that they can't be walked on.

essentially when they fall apart, because you still have the felt as protection.
many times you can take down the tiles and just replace the felt, battens, and rafters.

 

[Plupp 122206]

Very good input! If you can't see it leaking down onto more central constructions, it's very serious! You should have been able to see that the rafters were rotten from inside the attic, right?

Our summer cottage has a shed roof, where the underlay is nailed onto battens on the rafters (rather roof beams), so they are completely enclosed, no attic exists. From the inside nothing was visible, until one day water started running out of a door frame.

I knew the roof was bad, I had told my wife that within five years we must redo the roof, it got postponed and vacations in Thailand pushed back.

Now we are doing the same with the floor, though it had rotted from the other direction...

Should have bought a bulldozer from the start...

 

[AndersS]

You have my opinion on your roof, then you decide for yourself what risk you want to take. Most here are giving you advice based on experience and the construction you have that it's time for action. There's an expression regarding old houses; "as long as you keep the roof tight, it'll last forever". So if there's something you shouldn't take chances with, it's the roof.

 

[Microkatten]

I have an asbestos cement roof that is about 60 years old. But even though it has not - seemingly - leaked, it has been obvious that it needs replacing. Although asbestos cement sheets last longer than concrete, you can tell by the name. But it is quite irrelevant in this context - the technical lifespan for my roof has expired.

I have two choices - either I replace the roof now, or I wait. If I wait, the risk is significantly higher that the roof won't remain watertight and eventually damages building parts. The other day, a part of the eaves fell down because the sheathing was rotten, and now it suddenly becomes urgent to replace the roof. A bit like Harrisburg...

It is impossible to estimate how long a 60-year-old roof - or a 48-year-old concrete roof without felt - will last. The technical lifespan of your roof has, as mentioned earlier, likely passed, and you can't be 100% sure about the roof, no matter how much you want:

From the inside, nothing was visible until one day water started pouring from a door frame.
.

Either you keep the roof and accept the risk that it leaks or will leak tomorrow or in 5 years, regardless of whether you notice it or not. Or you put on a new roof and minimize the risk of leaks for many years to come. I think it's that simple.

For my own roof, I would have obviously preferred to replace it last year if I had the choice. And I could have, of course.

 

[jocek]

One reason it's good to have dense roofing felt is that ice can lift a tile, creating a local "backflow." This can lead to a significant amount of water in the spring if, with a bit of bad luck, it occurs at a valley. I had a Gullringshus from 1990 with only Masonite boards under the roof tiles, which let in quite a lot of water in the valley.