Fibreglass roof leak

grumbler

plumb1_2 said:

grumbler said:

Giggidy said:

grumbler said:

Giggidy said:

 have thought a roofer would be able to sort it but he said not.

I would have thought the same. It's a job for a roofer, possibly a less lazy and less choosy one. More and more tradespeople get spoiled by the current market.

What's this hole in a tile at the bottom on the left side? And why fibreglass, not (thick) led?

Not sure which tile you mean, the third one from the gulley on the left? That could be the source perhaps, because the patches are relatively small.

Yes, the visible big hole on the edge of the photo.

I can’t see a hole, sure it’s not a lump of moss?

Giggidy said:

grumbler said:

Giggidy said:

grumbler said:

Giggidy said:

 have thought a roofer would be able to sort it but he said not.

I would have thought the same. It's a job for a roofer, possibly a less lazy and less choosy one. More and more tradespeople get spoiled by the current market.

What's this hole in a tile at the bottom on the left side? And why fibreglass, not (thick) led?

Not sure which tile you mean, the third one from the gulley on the left? That could be the source perhaps, because the patches are relatively small.

Yes, the visible big hole on the edge of the photo.

I took a picture of the picture on the roofer's phone, I think that's just his screen that was cracked 

                   

plumb1_2

Tucosalamanca said:

That's absolutely a roofer's job. I don't think that they want the work.
 
It looks like a bodger has had a go in the not too distant past.
The valleys have had a liquid coating applied and the mortar doesn't look too old. I'm guessing the current issues you're experiencing are faults that have been there a while.

Hard to tell from the photo but I'd expect to strip that entire area, replace valleys and possibly redo the deck within a couple of days. So up to two days labour for two guys plus materials and waste costs.

Those valleys are just fibreglass and not treated imo. That roof decking looks like a pvc membrane.
Op don’t start  ripping things out, get a good roofer .

plumb1_2

itsakidsworld said:

Hi,

It might be Capillary Reaction which has caused the issue after snow has sat in the box gutter area of your roof ( the lower flat section).  The roof looks in good order with a fibreglass base and fibreglass valleys instead of traditional lead valleys ( which are not an issue if left untouched - all new houses have fibreglass valleys fitted).

The snow sits in this area and then as it melts, it melts from the warmest part of the snow which is underneath. This then causes a Capillary Reaction - imagine having a "wet vac" under your tiles on full suction pulling water into it - this is what Capillary Reaction does.

If it has only occurred when snow has sat on your roof, this would be the problem. You can make a wooden frame that sits on top of the box gutter, but clean the box gutter first of any loose debris. Then if/when it snows again & the snow starts to melt, it drips through the slats of your wooden frame and runs away into the outlet.

Wooden slatted frames were common years ago but as they rot, people discard them & do not replace them. 

Hope this helps.

That’s a good explanation,above
those fibreglass valleys have ridges on them, they are not help the mortar to stick they are there to stop capillary action.
where lead is used it should be turned back on itself 25mm to stop capillary action.
All  of lead on new housing is fitted by the site plumber.