"Neil" wrote in message


I'm not a roofer but may I ask if you had any rain in the order of an
inch or so in an hour or so recently?

Or to put it another way: An inch of rain falling on the part of the
roof that drains into the valley and you want to duct under the lead
into the masonry would dump how much water into your home in an hour?

Why not just take the lead off and spread the water around a little?

The felt on my 3 year old pitched roof has failed in several places
adjacent to the leadwork of a valley gutter and the recent heavy
rains have allowed water through to the ceilings beneath.

The felt is just a secondary failsafe. Look for damaged and/or missing
tiles further up

The felt that the builder installed looks to me the sort of quality
that would be more suited to a rabbit hutch with large areas of it
now very brittle.

That is the stuff they have used for decades. It does go brittle. It is
reinforced with hemp if that helps.

I will have to refelt and I am looking for some advice on the correct
construction method to create a watertight seal about the valley.

Explain further please. You are stripping the roof because you are
unhappy with the felt?

The present felt is lapped over the top of the lead to the valley (by
about 10cm) and then a mortar fillet between the top of the felt and
the underside of the roof tiles.

All pretty standard and good workmanship so far.

The roof is leaking further up by the sound of it. Get up to the ridge
and see what you can see and post some pictures but you will save
yourself a lot of heartache getting the original roofers to come and
repair it. I doubt they will charge much more than it will cost you in
the long run.

If you want to diy, I and not a few others will try to help.

Good luck.




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