We have done a few of these. We usually use the most appropriate material for the roof surface itself (torch-on membrane or equivalent), then build a platform on which the deck surface itself is installed. This way, the deck doesn't look like a roof, and there is no foot traffic damage to the roofing material. I know some people install granulated top sheet and claim it is strong enough to support foot traffic, but what if someone puts a chair on this and starts rocking back and forth? You've got a tear in no time.Grumpy said:When a customer says to you "I have this flat roof I want to use as a deck" how do you respond? What type of system do you recommend? Assume they are setting no limitations on material or budget.
You are, of course, perfectly right. Our decks do float, and in fact we use rubber pads to support the deck and hold it separate from the roofing material. As I said, we've done a few and so far no call-backs.Grumpy said:Pgriz, we usually do a double layer of the modified bitumen torch down. If we do a single layer, we at least install a double layer where the "deck" sleepers make contact with the roof.
If you do use a deck type system it is important that the deck floats and is not fastened to the roof. Also it's important to be aware that the pressure of the deck sleepers on the roof is a common cause of leaks. This is why we do the double layer at the sleepers.
Tom hay was telling me abotu a roof system he installed as a deck a few months back and I wish I could remember the link to the pics. He coated the roof with some kind of material (adhesive maybe?) then sprinkled granuals of some sort on the roof for traction.
I tore one out that was done this way several years ago. This thing was rotten through the deck and into the rafters. Client wanted mahogany decking so we did double torch down and sleepers. i still like the duradeck or deck-ingNow, i like a build up of Epoxy and 3 layers of 16Oz glass cloth. We roll on a high build primer and 2coats of none skid or rubber DURA BAK .
I make the deck posts out of cedar and glass them in and coat them with epoxy You can get the glass and epoxy on EBay in 5 gallon buckets and large rolls . My largest was 12x 20 . Ive done lots of master bed room walk outs 6x6 .
Duro-Last is a Hybrid copolymer pvc alloy, which means it is a white membrane reinforced with a polyester scrim.My Uncle worked for a roofing outfit that was certified to install Durolast. He said the company on average charges $1,000 per square labor and materials for new construction.
Just looked at a roof that had it on the roof above the indoor pool.
Isn't this just another of the many thin rubber like flat roofing products with a life expectancy of 10-15 years?
I haven't had any callbacks on my glass roof jobs yet . The first one was done in 1997 . I have been back to change the color on one and replace the none skid. It still looks like new . I mite try the dura deck next time .I tore one out that was done this way several years ago. This thing was rotten through the deck and into the rafters. Client wanted mahogany decking so we did double torch down and sleepers. i still like the duradeck or deck-ing