Disintegrating mess behind fascia, what can I do?

[mrhenry]

Took the fascia off for something unrelated and found this mess of disintegrating chipboard. What do I even do about it?

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• mrhenry
• Monday at 4:10 PM

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• mrhenry
• Monday at 4:10 PM

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• mrhenry
• Monday at 4:10 PM

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• mrhenry
• Monday at 4:10 PM

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• mrhenry
• Monday at 4:10 PM

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• mrhenry
• Monday at 4:10 PM

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• mrhenry
• Monday at 4:10 PM

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• mrhenry
• Monday at 4:10 PM

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• mrhenry
• Monday at 4:10 PM

I've pulled a lot of chipboard out from under the valley, and cut off a piece of rotting wood. I think a lot of water must have been dripping down there in particular behind the fascia. Not sure what to do where the rusty nail is. Or how to stop water getting behind in future.

 

[noseall]

Took the fascia off for something unrelated and found this mess of disintegrating chipboard. What do I even do about it?

20260615_160505.JPG

• mrhenry
• Monday at 4:10 PM

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• mrhenry
• Monday at 4:10 PM

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• mrhenry
• Monday at 4:10 PM

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• mrhenry
• Monday at 4:10 PM

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• mrhenry
• Monday at 4:10 PM

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• mrhenry
• Monday at 4:10 PM

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• mrhenry
• Monday at 4:10 PM

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• mrhenry
• Monday at 4:10 PM

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• mrhenry
• Monday at 4:10 PM

I've pulled a lot of chipboard out from under the valley, and cut off a piece of rotting wood. I think a lot of water must have been dripping down there in particular behind the fascia. Not sure what to do where the rusty nail is. Or how to stop water getting behind in future.

Are you in Scotland?

 

[mrhenry]

No, why?

 

[RrogerD]

Fit gutter guards. You'll likely find that it's just the end of the board that is rotten. The guard will go up beyond this. Should last another 20yrs at least.

 

[noseall]

No, why?

Sarking boards are compulsory.

I don't see what purpose that chipboard serves. The added lift on those tiles (over and above the rafter line) is ridiculous.

 

[noseall]

Fit gutter guards. You'll likely find that it's just the end of the board that is rotten. The guard will go up beyond this. Should last another 20yrs at least.

What's a gutter guard?

 

[RrogerD]

What's a gutter guard?

Sorry, meant Eaves guards.

 

[noseall]

Sorry, meant Eaves guards.

Eaves trays only work if the felt above isn't knackered.

I'd be more bothered about what he might find when he removes the first course of tiles.

 

[Si_]

That's the roofing equivalent of Tom Cruise's shoes.

 

[mrhenry]

Sarking boards are compulsory.

I don't see what purpose that chipboard serves. The added lift on those tiles (over and above the rafter line) is ridiculous.

All of the sarking is this chipboard stuff. Maybe it is some special kind of chipboard.
The extra bit of chipboard there is padding because that particular rafter seems to be lower than the others... it's a bodge job.
The last row of tiles does seem to be at a shallower angle for some reason.

Okay, update. The chipboard looks like is is damaged only up to about 20cm in from the eaves. I managed to remove only one tile as the tile at each end of the row is mortared in and I can't move them without breaking up the mortar which I don't want to do.
The felt underneath doesn't look bad:

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• mrhenry
• Tuesday at 3:38 PM

I will go for an eaves tray as a solution, but towards the valley it isn't just sagging, it's held down by a batten:

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• mrhenry
• Tuesday at 3:38 PM

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• mrhenry
• Tuesday at 3:38 PM

I suppose I will have to remove this somehow, I'm not sure what it is doing there. Here it is viewed from the eaves.

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• mrhenry
• Tuesday at 3:38 PM

The other issue is I don't know how to sort out the valley (I'm not sure if that's the proper name for it). There is an inner corner there that just has zero overhang. I have no idea. I thought maybe covering that gap with the eaves tray but I don't think that works really. Putting it on top of the grey valley tile makes some sense, but then the felt would be on the wrong side. If I put it under the valley tile then it's not in line with the bottom of other tiles and i don't think it can be shaped like that.

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• mrhenry
• Tuesday at 3:38 PM

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• mrhenry
• Tuesday at 3:38 PM

I'm not actually sure what is holding that valley tile up there.

 

[mrhenry]

The problem is the valley isn't accurately centred in the actual corner of where the two roofs meet. It's offset by a few inches which means it ends up with this v shaped gap

No not quite. The valley actually is right in the corner. The problem is the depth of the eaves on one roof is significantly more than the other, so there's a mismatch in where they naturally meet and where the valley goes.

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• mrhenry
• Tuesday at 4:19 PM

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• mrhenry
• Tuesday at 4:19 PM