Outdoor rooftop flooring - What is an inexpensive way to use tar roof over garage as a rooftop deck. Wood decking too expensive. Can we paint the tar roof or put a layer of roofing paper over it? Also, has low spot where water accumulates. Any ideas. Just want it to look nice. »
DeWitt Architects Tile is not a waterproofing. It is not in a shower and is not on a roof. You need a membrane.
For the membrane we are not using EPDM but rather 80mil PVC. I would suggest removing the existing roof down to the plywood. Then put a 1/2" decking matt over it. So it be layered tile to decking as:
1. tile
2. Schluter tile isolation matt
2. mortar set base
3. Schluter drainage matt
4. PVC membrane and flashing as required
5. roofing matt
6. decking
What is the span and spacing on center of the 4x9's? That is what determines if the 1/2" plywood is big enough to handle the dead and live loads of a roof deck.
I suggest you consult a structural engineer to make sure the roof stucture is strong enough for a deck. Then hire a roofer experienced in roof top decks, and low slope pvc roofs. Then hire an experienced tile layer. The roof top also needs proper drainage flow and outlet.
penn02 We live in Brooklyn and have a deck on our roof. We used tiles by great mats.com. The commercial ones are made with channels for drainage and protect the roof.
For the membrane we are not using EPDM but rather 80mil PVC. I would suggest removing the existing roof down to the plywood. Then put a 1/2" decking matt over it. So it be layered tile to decking as:
1. tile
2. Schluter tile isolation matt
2. mortar set base
3. Schluter drainage matt
4. PVC membrane and flashing as required
5. roofing matt
6. decking
What is the span and spacing on center of the 4x9's? That is what determines if the 1/2" plywood is big enough to handle the dead and live loads of a roof deck.
I suggest you consult a structural engineer to make sure the roof stucture is strong enough for a deck. Then hire a roofer experienced in roof top decks, and low slope pvc roofs. Then hire an experienced tile layer. The roof top also needs proper drainage flow and outlet.