Simon Boyes Posted March 17, 2022 Share Posted March 17, 2022 I think this pictureshows everything. Non où Link to comment Share on other sites More sharing options...
Simon Boyes Posted March 17, 2022 Author Share Posted March 17, 2022 Mark said non of the tiles were broken , although he is fitting eaves trays . Can water leak through these tiles or is it condensation? Thanks simon Link to comment Share on other sites More sharing options...
Marvin Posted March 17, 2022 Share Posted March 17, 2022 40 minutes ago, Simon Boyes said: Mark said non of the tiles were broken , although he is fitting eaves trays . Can water leak through these tiles or is it condensation? Thanks simon Imho. If there's trickles in one area then leaks. If the whole surface of roofing felt is damp condensation. Espically during warm days and cool nights.... 2 Link to comment Share on other sites More sharing options...
tonyshouse Posted March 17, 2022 Share Posted March 17, 2022 Way more likely to be condensation this time of the year 1 Link to comment Share on other sites More sharing options...
Simon Boyes Posted March 18, 2022 Author Share Posted March 18, 2022 So basically this isn't from porous tiles but condensation between the felt and the tiles . Link to comment Share on other sites More sharing options...
tonyshouse Posted March 18, 2022 Share Posted March 18, 2022 Yes, most likely tripping from the backs of the tiles Link to comment Share on other sites More sharing options...
Simon Boyes Posted March 19, 2022 Author Share Posted March 19, 2022 This is a link to the full video of the roof . I uploaded it to YouTube , so if anyone can spare a minute , thanks. Link to comment Share on other sites More sharing options...
Marvin Posted March 19, 2022 Share Posted March 19, 2022 (edited) Hi @Simon Boyes Sorry about this. It looks like the overlap on each tile is short: What pitch is the roof? How far does each course of tile overlap the next course ( bottom of top tile onver the top of the next tile down. Is the building in exposed conditions? Edited March 19, 2022 by Marvin Link to comment Share on other sites More sharing options...
Simon Boyes Posted March 19, 2022 Author Share Posted March 19, 2022 I have no idea what the pitch is , by the look of it there must be 2 to 3 inch overlap . Surely building regulations would have been adhered to . It isn't especially exposed . Link to comment Share on other sites More sharing options...
Marvin Posted March 19, 2022 Share Posted March 19, 2022 Hi @Simon Boyes Can you take a picture of the gable end so I can see the roof angle. Link to comment Share on other sites More sharing options...
Marvin Posted March 19, 2022 Share Posted March 19, 2022 I think the minimum overlap is 75mm on a steep roof otherwise with a wind the water will travel up over the top tile, under the tile below. If its like my roof 12 feet along to 5 feet up. It has to have a minimum of 4 inch overlap. If either of these are not right, or you are often exposed to driving rain, this will be the problem. The solution will be to remove all the tiles, batten and roofing felt,replace the batten and felt spacing the batten tighter together which will mean having an extra row of batten and tiles, or 2, to make the overlap correct. You can re-use the tiles but if you break alot you can use old one one side and new on the other or all new ones. Be careful of the lead-in time from order to delivery of tiles, this can be months. Good luck Marvin Link to comment Share on other sites More sharing options...
Simon Boyes Posted March 19, 2022 Author Share Posted March 19, 2022 I think if it comes to that its a for sale sign Link to comment Share on other sites More sharing options...
Simon Boyes Posted April 13, 2022 Author Share Posted April 13, 2022 Had the builder back and he confirmed the tiles had a minimum of 75 mm overlap . I'm putting it down to condensation , the felt having rotted away at the bottom obviously was an issue , as any water trickling down didn't go into the guttering, the fitting of eaves trays should sort that problem . Also had to have an air brick vent fitted in the upstairs bedroom because of mold caused by condensation , caused by tennants refusing to ventilate properly. Link to comment Share on other sites More sharing options...
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