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Hi we have got water running in at the end of our extension.

Posted by Huw Richards, on
We have been told that because the roof pitch is only 12degs then the tiles need to be replaced it has been ok for the last four years but now water is running into the cavity at the end of the extension and coming in through the window reviels.Can you recommend a suitable tile to replace these existing ones.
scott ryan

scott ryan

Hi huw I'm on a job at the moment with the same issue the reason it's probably took 4 years is because the felts been holding up the best tiles to use are redland regents (bold rolls) they go down to 12.5 degrees failing that flat roof the area Hope this helps Scott Weathertech
Chris Ocego

Chris Ocego

Hi The lowest pitch tile you can use is a marley Wessex roof tile but I still think the pitch is to shallow. The only other thing is to strip it off and lay furrings down the spars to increase the pitch. Chris southcheshireroofing
James Hollinsworth

James Hollinsworth

there is a concrete roofing tile available manufactured by forticrete specifically for low pitched roofs like yours, here is a link to their site, you will see their tiles are designed for pitches as low as 10 degrees. (unable to post link, search for 'forticrete low pitched concrete roofing tile' ) I must add though there is probably a small amount of work on top of this as I don't think your membrane is adequate either and therefore if perished may the roof may also require new lath and membrane or if it has been ill fitted at the very least a length of damp proof coursing and one new lath timber or at the very least a EPS tray. Hope this helps James Complete Home Solutions
Keith Pugh

Keith Pugh

The only thing that has been keeping the rain out of your roof is the felt underneath the tiles now the felt has perished the rain has found it's way in / The only tiles you can get for that pitched roof are fortycrete centurions they are designed for that pitch they can go down to a 10 degree pitch
paul pearson

paul pearson

Hi tiles usually only go down to 13 degrees and then water starts to draw back under tiles if any less the only way is to counter batten the roof with double felt and laths and you can reuse the old tiles hope this helps
Paul Collins

Paul Collins

No concrete or clay tiles can be laid at that pitch. It's far too shallow, because of that the water is being drawn in due to capillary action. The constant leaking of water has caused the underlay to perish & that's why your now getting water in. Options are use a DECRA roofing system, lead flashing, a torch on felt or a GRP system. Tiling or slating it again would only result in leaks happening again. Check to see if your extension, has a warranty as the roof has been incorrectly fitted.
Andy Thornton

Andy Thornton

Hi Huw, I would recommend you speak with your roofers about eaves protection before replacing any tiles. If you tiles are only 4 years old then they are most unlikely to have failed. The majority of tile will have a minimum of 25 years life in them. Hope this was of help for you. Regards Andy Thornton
Marcus Johnstone

Marcus Johnstone

Hi, it is quite a common problem, there are several ways to resolve this problem. A GRP system would be advisable so you don't have a recurring problem.
paul pearson

paul pearson

Hi tiles usually only go down to 13 degrees and then water starts to draw back under tiles if any less the only way is to counter batten the roof with double felt and laths and you can reuse the old tiles hope this helps
Luke Newton

Luke Newton

A Marley mendip tile can be used at 12.5 degrees as long as your extension is only a lean to with no hips or valleys,these tile must be layed will at least 100mm head lap,like what others have said before,the felt has kept the rain out until now, Regards luke Roofing northwest
Ivan Locke

Ivan Locke

This pitch is low, i would advise you to get professional advice to try and find out why it has just started leaking. also increase the pitch or turn it into a flat roof
Andrew John Wheaton

Andrew John Wheaton

Contact Marley and Redland these are the two primary suppliers of roof tiles and slates in the UK. They'll tell you if they have a product suitable or if there's one available elsewhere. That is an exceptionally low pitch and I would be tempted to put a flat roof covering on in GRP (fibreglass).

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