Originally Posted By: kdolin This post was automatically imported from our archived forum.
Hey all, I need some non-binding opinions on this one, I am going to try and post the pics but just in case, I will describe.
Single story misson style wood frame home, flat roof with parapets. First of all, the rear parapet was removed by the owner due to “drainage problems” and a gutter was installed across the back of the home, now drainage just drops off the edge of the roof, Hopefuly into the gutter, but I suspect it will overshoot as the gutter is about 12 inches below the edge. Second the material is a single mebmrane rubber membrane it would appear to be applied directly to the substrate(appears to be plywood) there is no “cant” if that is the correct term for the corner where the flat roof tranists to the parapet, nor is there any flashing, and the rubber membrane comes up the sides of the parapet and is glued to the top edge, again no flashing, Then the membrane runs over the back edge where the parapet was, and is fastened with furing strips and screws. I have advised the client to get independent evaluation of the roof and verify permits, Does any of this make sense?
Originally Posted By: rsmith5 This post was automatically imported from our archived forum.
There are some ?? Is there a fastener [one inch disc with a screw head] visable beneath the membrane at the base of the wall. There should be no cant at the base. That is a built up roofing detail. I am not sure on the wall covering, is it the field membrane going up and over the wall? The peice in the 2nd pic. wrapping to the front of the wall and just hanging is no good. Should be terminated. The pic. appears to show a counter flashing. The membrane on the wall is fine if it goes up and over. It needs to be mechanically fastened at the bottom of the wall. Hard to see the pics. and understand.
Originally Posted By: jnosworthy This post was automatically imported from our archived forum.
Kenneth,
I don’t believe there was a fourth parapet wall. It’s based on a hunch while looking at the vertical brick work to the right in the gutter photo. If the slope of the roof is and always was towards that “missing wall”, then if the wall was there, then it had to of had scuppers through the wall to exit the water. If not then it would have had to of had interior drains (like a swimming pool) and the slope would have been towards the center. Either way, this roof shape is probably a better way to go, different flashing detail by turning down instead of up.
Looks like fully adhered EPDM rubber to me. It probably is over wood sheathing cause you don’t see any tell tale anchor plate shadows for rigid insulation. When the perimeter edges of the membranes are counter-flashed in commercial work, then they typically are fastened at a “termination” bar when they turn-up. Then something is done to protect that joint. By wrapping up and over, you should remain watertight so long as the membrane sits tight and doesn’t lift. No pipe penetrations (is this a dwelling ??),or chimney to flash around is always good. I don’t know how well the paint will stay on the rubber as it goes over the top, where it is visible from the ground. The roof slope look gentle enough and the surface is not that big that I think most of the water would make it to the gutter most of the time. If not I recommend up sizing to 6" K style. I would suggest that the fascia board that the gutter hangs from be wrapped in trim metal to protect it once and for all. Either protect or plan to replace it in the future. Similar to out front on the rake edge of the tile roof. We don’t use spanish roof tiles up this way, but with the visible white stains on the end grain of what looks like 1 x6 T & G roof decking, I make sure to add a layer of something, wood or otherwise, over this whole area to reduce the number of possible entry points for weather. Looks like it would tuck nicely up under the tile overhang. Lastly, I really wondering about what appears to be those two louvered vents let into a brick wall thats maybe 8" thick ?? Hummmm… different