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Suggestions required for leaking flat felt roof

  • 24-02-2010 2:20pm
    #1
    MartinaFC
    Registered Users Posts: 13 ✭


    Hi there
    We had a large wooden garage built last year & extended same 6mths ago-the roof is roof wood sheeting & felt...Over the past 6mths various leaks have appeared. The builder initially returned and did a few patch up jobs with paint on sealer, bitumen and refelted in places but the leaks are still there & he's gone to ground :mad: So what do we do now ? I've been advised that the pitch on the roof is not steep enough & a friend suggested a corrugated roof... Needless to say our budget is non existant but we have to do something - Advice/ Suggestions/Help please ???


Comments

  • #2
    ChemoInf
    Closed Accounts Posts: 4 ✭ChemoInf


    Hi Marina,
    sorry to hear about your leaks. We have a small flat roof on our bathroom. The edge where it attaches to the main roof had a number of cracks, and leaks would run down that wall. A visiting roofer suggested slating, even though it has a pitch of about 5 deg. I think that would have been a mistake, as the roofer would not have been around to catch the leaks. Instead I got a roll of wide (~30cm) roll of bitumen/aluminium 'lead'. It's briliiant stuff. Because it's alluminum foil, it moulds around bumps and corners. Then the gooey bitumen layer (~1mm thick) makes a waterproof seal. It's safe, but they colour it lead to look the part. My trick was to use a hair dryer to soften the tar surface, then squeeze it down. Once that cools in place it is going nowhere!
    You may be able to cover the worst areas with overlapping runs of this stuff. Should be cheaper than a new roof!


  • #3
    MartinaFC
    Registered Users Posts: 13 ✭MartinaFC


    Thanks for the advice - unfortunately the garage/workshop is pretty huge so there'd be a lot of patching to be done....thanks though


  • #4
    aj25
    Closed Accounts Posts: 6 ✭aj25


    Only option is to re felt. no point in trying to patch over a bad job. if you can remove the old felt and lay timber firing pieces to increace the fall, fix down ply sheets and prime it. torch on felt in 2 layers an under layer and a top coat. then flash any part that joins the house with lead. think paralon is the name of the felt i used before. use a registered and acredited Paralon Agent and they will give a manufacturers 30 year warrenty on their product.


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