steve_b_wales Posted January 4, 2015 Report Share Posted January 4, 2015 My shed has steel profile sheets on the roof. Where the guttering is fitted, the felt has rotted away, and water is soaking back into to boards. I intend to take the sheets off and renew all the felt, but what type do I use? Steve. Quote Link to comment Share on other sites More sharing options...
Blackpowder Posted January 4, 2015 Report Share Posted January 4, 2015 I think its called 'mineral felt' its got jaggy grit on the surface. Plain roofing felt is mainly used under other roofing materials, tiles or slates. Blackpowder Quote Link to comment Share on other sites More sharing options...
Imperfection Posted January 4, 2015 Report Share Posted January 4, 2015 Buy the heaviest grade you can and a box of clout nails too. Bitumen adhesive to glue the laps down really does help too and pretty cheap at around £10 for 5L. Quote Link to comment Share on other sites More sharing options...
polester Posted January 4, 2015 Report Share Posted January 4, 2015 I'd use something like http://www.screwfix.com/p/felt-support-tray-1-5m-pack-of-5/36622 alongthe bottom edge. Depending how far up the the felt is damaged you might not have to strip the roof just slide this under the felt Quote Link to comment Share on other sites More sharing options...
MattSoanes Posted January 4, 2015 Report Share Posted January 4, 2015 If possible you want the green mineral felt. Quote Link to comment Share on other sites More sharing options...
steve_b_wales Posted January 4, 2015 Author Report Share Posted January 4, 2015 I think its called 'mineral felt' its got jaggy grit on the surface. Plain roofing felt is mainly used under other roofing materials, tiles or slates. Blackpowder I think the felt underneath the sheets/on top of the boards is very thin. Buy the heaviest grade you can and a box of clout nails too. Bitumen adhesive to glue the laps down really does help too and pretty cheap at around £10 for 5L. I will get the best that's available. I'd use something like http://www.screwfix.com/p/felt-support-tray-1-5m-pack-of-5/36622 alongthe bottom edge. Depending how far up the the felt is damaged you might not have to strip the roof just slide this under the felt The link does'nt work. But I'll look it up. Quote Link to comment Share on other sites More sharing options...
polester Posted January 4, 2015 Report Share Posted January 4, 2015 http://www.screwfix.com/p/felt-support-tray-1-5m-pack-of-5/36622 Quote Link to comment Share on other sites More sharing options...
polester Posted January 4, 2015 Report Share Posted January 4, 2015 If you're going to strip the roof have you thought of using a breathable felt like http://www.screwfix.com/p/protect-a1-roofing-underlay-1-x-15m/31617. Just out of interest why felt it if the sheets are ok, is it a plyed roof that has been clad over? Quote Link to comment Share on other sites More sharing options...
steve_b_wales Posted January 4, 2015 Author Report Share Posted January 4, 2015 If you're going to strip the roof have you thought of using a breathable felt like http://www.screwfix.com/p/protect-a1-roofing-underlay-1-x-15m/31617. Just out of interest why felt it if the sheets are ok, is it a plyed roof that has been clad over? The roof was made out of 8x4' x1/2" boards, then felt was applied before the steel sheets were added. The felt was cut too short where the guttering is. I'll check it out properly when its a dry day, and see if I need to strip the roof and re-felt it, or buy the felt support trays, as was suggested. Thanks. Quote Link to comment Share on other sites More sharing options...
Fisherman Mike Posted January 4, 2015 Report Share Posted January 4, 2015 Use Tyvek and a supplementary undercloak at the gutter of 450 wide hyload pitch polymer... That will see you out Quote Link to comment Share on other sites More sharing options...
hodge911 Posted January 4, 2015 Report Share Posted January 4, 2015 if you got a maxwells diy store close they are the cheapest for felt mate [well around here they are ] Quote Link to comment Share on other sites More sharing options...
steve_b_wales Posted January 4, 2015 Author Report Share Posted January 4, 2015 Use Tyvek and a supplementary undercloak at the gutter of 450 wide hyload pitch polymer... That will see you out Cheers Mike. I'll check out what's been mentioned and decide what to do. Hopefully, I may not have to take the sheets off, but just repair the edge by the guttering. Quote Link to comment Share on other sites More sharing options...
Fisherman Mike Posted January 4, 2015 Report Share Posted January 4, 2015 (edited) Cheers Mike. I'll check out what's been mentioned and decide what to do. Hopefully, I may not have to take the sheets off, but just repair the edge by the guttering. If that's the case just loosen the sheets at the eaves, lift then and slip the Hyload under the existing felt and dress it into the gutter. Any good builders merchant should sort you out with the Hyload or similar polythene DPC it comes in standard wall widths up to 600 wide in 20m rolls. Edited January 4, 2015 by Fisherman Mike Quote Link to comment Share on other sites More sharing options...
foxy bingo Posted January 4, 2015 Report Share Posted January 4, 2015 make sure before you re-felt the wood is bone dry or you will trap moister under the new felt and it will rot in no time Quote Link to comment Share on other sites More sharing options...
steve_b_wales Posted January 4, 2015 Author Report Share Posted January 4, 2015 If that's the case just loosen the sheets at the eaves, lift then and slip the Hyload under the existing felt and dress it into the gutter. Any good builders merchant should sort you out with the Hyload or similar polythene DPC it comes in standard wall widths up to 600 wide in 20m rolls. Thanks make sure before you re-felt the wood is bone dry or you will trap moister under the new felt and it will rot in no time Thank You. Quote Link to comment Share on other sites More sharing options...
Paddy Galore! Posted January 4, 2015 Report Share Posted January 4, 2015 i'd use a burn on felt, expensive but lasts ages. Quote Link to comment Share on other sites More sharing options...
dorianbuilders Posted January 4, 2015 Report Share Posted January 4, 2015 As suggested use DPC or if you wanted to go the extra mile an eaves tray would do a good job to deflect the water into the gutter. Quote Link to comment Share on other sites More sharing options...
bud 20 Posted January 4, 2015 Report Share Posted January 4, 2015 2 ft or i8in dpc cheap and will not perish at eaves Quote Link to comment Share on other sites More sharing options...
rec-baller Posted January 4, 2015 Report Share Posted January 4, 2015 pity youre not closer to me as i sell all types of roofing felt and d.p.c,s , i would do as most people have suggested, use a good quality 18" dpc. Hyload trade or Hyload house builder, for cheepness you could get away with a standard p.vc-d.p.c make sure youre boards are dry or replace them, if you want to have a sacrifial layer under neath something like protec A1 or Wunderlay will do. you dont need the expense of a breather felt shaun Quote Link to comment Share on other sites More sharing options...
steve_b_wales Posted January 5, 2015 Author Report Share Posted January 5, 2015 pity youre not closer to me as i sell all types of roofing felt and d.p.c,s , i would do as most people have suggested, use a good quality 18" dpc. Hyload trade or Hyload house builder, for cheepness you could get away with a standard p.vc-d.p.c make sure youre boards are dry or replace them, if you want to have a sacrifial layer under neath something like protec A1 or Wunderlay will do. you dont need the expense of a breather felt shaun Thanks for the advice, and to all the others who have suggested a way to repair the roof. I will wait until we get better weather (?) and take a good look at the roof. Steve. Quote Link to comment Share on other sites More sharing options...
Essex Keeper Posted January 5, 2015 Report Share Posted January 5, 2015 2 ft or i8in dpc cheap and will not perish at eaves +1 Quote Link to comment Share on other sites More sharing options...
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