chiangrai Posted May 21, 2016 Share Posted May 21, 2016 I had a post about this last year but only found out what the problem was and not the solution before the rains came. So I have a concrete shed with a concrete roof,The concrete roof looks flat but it is slightly pitched to make the water run off in a certain direction. The roof is 4" thick and overhangs the walls by about 9" all round. The problem is when the water runs off the roof it doesn't fall off the overhang. It gets wicked back along the underneath of the overhang and runs down the wall.The wall then gets damp even on the inside. What's the best thing to do?Gutter and fascia board.How does that work and where exactly do I put it. Link to comment Share on other sites More sharing options...
Pib Posted May 21, 2016 Share Posted May 21, 2016 Just install an "edge," like a 90 degree angle device preferable made from plastic versus metal see image below), underneath the edge of the roof overhang. Look in the bathroom/tile section of hardware stores and you should find something suitable and cheap. Since water can't flow uphill it will just drip off at the angle device. Link to comment Share on other sites More sharing options...
chiangrai Posted May 21, 2016 Author Share Posted May 21, 2016 O.k You both seem to be saying the same thing and what your saying sounds a lot easier than guttering. But I don't understand exactly where to install it. Do I install this angled piece on the vertical 4" face of the roof overhang to turn at 90 degrees away from the wall.Is that at the top or the bottom of the 4' face. I would love a picture of where exactly to install it. Link to comment Share on other sites More sharing options...
Pib Posted May 21, 2016 Share Posted May 21, 2016 Install on the underside of the overhang close to the edge. Link to comment Share on other sites More sharing options...
Bantex Posted May 21, 2016 Share Posted May 21, 2016 Easiest way would be to cut a check-throat on the underside of the concrete roof. If a lot of water flows from the roof, just cut the channel wider and deeper. 1 cm wide and deep is sufficient. This is how concrete window sills in the UK cope. When the water now tries to flow back to the wall, it hits the groove and drops down. If you wanted to install guttering just place one edge on the wall side of the groove with the outer edge out past where the roof finishes. This will catch water running off the roof and the water dripping from the groove. In the diagram below just treat the sill as your roof. Link to comment Share on other sites More sharing options...
chiangrai Posted May 21, 2016 Author Share Posted May 21, 2016 Right,Now I understand. This is good news so much easier than guttering. Is there a minimum size that the vertical face of the angled device should be. Link to comment Share on other sites More sharing options...
Pib Posted May 21, 2016 Share Posted May 21, 2016 It don't have to be much...probably the smallest you'll find will be around one-quarter inch which is more than enough. Link to comment Share on other sites More sharing options...
chiangrai Posted May 21, 2016 Author Share Posted May 21, 2016 Thanks Pib Link to comment Share on other sites More sharing options...
johng Posted June 3, 2016 Share Posted June 3, 2016 Sometimes in the monsoon season you can see horizontal rain getting into all sorts of "waterproofed" places. Link to comment Share on other sites More sharing options...
codybell Posted June 4, 2016 Share Posted June 4, 2016 Thanks for sharing the information. Link to comment Share on other sites More sharing options...
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