I've never seen it before. Large dark olive green sheet like a pool liner, draped all over the roof , in one go, then some liquid from a bucket paint rollered over. I don't know if other layers go over the top but the "pool liner" did not look very thick
Could be a form of GRP
Richard
Fibre glass?
This seems like a good enough place to link to this roofer, whose videos seem quite handy and as he says "isn't just a a thinly disguised advert set to music" ...
wind in wrong direction to smell any polyester resin. I wonder if stones will go on top. If resin went over the new boarding, then "pool liner" then resin plus something, perhaps no stones for anti-wind weight, anti-sun damage and anti-birds+cats .
It is probably EPDM. A type of rubber that is used for pond liners and roofing. Single layer.
I used it on the roof of a large shed I built about three years ago. Stuck down with a water based contact adhesive that was rollered onto the roof. Mine was black though.
It is supposed to last something like 25 years in full sun - time will tell! Three years on, it is still pristine.
Not sure about colour - what I have seen all looks various shades of dark grey/black, but have a look here:
I was at ground level and too far away to see properly. There was a 5 litre bucket of something that required gloves to handle. Perhaps they rolled out the membrane as they went, combing on glue on the boarding (unseen). Then as I could see the white of the roller , perhaps that long-handled roller was used dry , just for rolling the membrane into the glue underneath.
Flat roofs aren't architecturally logical, as rain and snow will shed much more quickly off a sloped roof. Yet for historic Modern-style buildings, fl at roofs are at the core of the architecture, meant to reflect the broad ho rizontal lines of the natural landscape.
They are only done to be cheap. They look like shit and leak like a sieve in a few years. All architects should be tarred and feathered. Failed artists.
Says the guy with a house that looks like a bunker.
Mine wasn't new when I moved in 20 years ago but is still sound. The only reason I might have to replace it now is that it wasn't insulated when it was built and the room below gets very cold at times.
Colin Bignell
One advantage of _NOT_ having any insulation in a flat roof is that you'll be able to detect leaks within hours (or days at most) rather than have such leaks announce themselves by the collapsing of the plasterboard from the weight of a soggy mass of fibre insulation a good 6 months _AFTER_ the fact. :-(
The leak wasn't a major one and, since I 'sealed' the obvious holes in the felting, it's just a slow drip over the kitchen sink whenever we have a really heavy downpour.
I got some stupid quotes for repairs to the flat roof from roofing companies trying to price themselves out of the market due to high demand.
I'm planning on getting the job done in the late spring / early summer when the roofing firms become sufficiently desperate enough for the work so they stop taking the piss on pricing up the job. If they still want 'stupid money' even then, I'll rope my SiL into helping me DIY the job[1].
However the job gets done, I want to replace the crappy felt with a one piece membrane (the pond liner stuff) which doesn't crack in winter or open up in summer.
I don't know why I didn't go for this option the last time I had to repair the roof just over a decade ago when I had to replace the mushy chipboard that had been used by the contractors in the original build. At least the marine ply sheets I used last time don't need to be replaced.
[1] I'm looking for any useful advice regarding suppliers of suitable 'pond liner' so any suggestions will be much appreciated.
I've managed to delay having a section of flat roof felting replaced, about 5 years. Problems were erupted pits over some felt nails producing local hot spots presumably, and cracks on hard rim edges. Used patches of new felt , hot melt glue, hot air gun and a patch of silicone rubber to "wipe" fuse melted tar and hotmelt together.
And if done properly, tar and feathers sounds like a good weatherproofing solution! John
I asked the owner if any pea-grit went over the top, no. So nothing stopping cats with itchy feet converting it into a scratching pad, brilliant.
My roofer replaced a cracked lead valley with EDPM, I went on their one day course in Alfreton and will fit the next stuff myself.
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