i have to create a walk on roof terrace i have been told to use 9 by 2 joist and sterling board as sub floor base. i am not sure what to cover sub floor with as i have to tile with ceramic tiles. i don't no what will be best to adhere to. what would be the best way to make sure i have a completely water proof floor as i don't want any leaks
roof terrace covering
- Thread starter magzy
- Start date
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cheers 4 that mate would you use a torch on felt on the sterlin board or should i use 3 quatre ply. and would that be enough of a water proof membrane. someone mentioned a 3 felt system but i don't no if this would be beneficial when it is to be tiled. what is is the difference between promenade tiles and ceramic tiles thanks again i just want to make sure it is a good job
Although sterling board is acceptable for decking, I'd prefer external grade ply (18mm minimum)
The felt may not be exposed, but it will still potentially experience the same thermal stresses (expansion in summer and freezing in winter) and this does wear it down, and eventually crack the bitumen. So don't go for a lesser specified felt just because it's covered.
Promenade tiles is a generic term and will apply to concrete or ceramic, but the important thing is the spacers and drainage beneath. You can't stick ceramic tiles down to the felt like you would on a floor
The felt may not be exposed, but it will still potentially experience the same thermal stresses (expansion in summer and freezing in winter) and this does wear it down, and eventually crack the bitumen. So don't go for a lesser specified felt just because it's covered.
Promenade tiles is a generic term and will apply to concrete or ceramic, but the important thing is the spacers and drainage beneath. You can't stick ceramic tiles down to the felt like you would on a floor
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will try the ply then instead thanks. when you say spacers and drainage below do you mean they do not sit directly onto the felt, if so what do you do instead of grouting i was going to lay joists with a fall to the front of the building and fit guttering underneath to collect the run off. the effect was going to be like a bathroom floor non slip tile and grout. i have done hundreds of bathroom floors but this will be my first outdoor tiling venture kind of thought it would be pretty much the same deal. got a couple of weeks to get as much info as i can before i start it.cheers for advise
sorry i don't mean tiling straight to ply i was gonna lay the 3 layers of felt first i just meant the laying of tiles on top of the felt being the same sort of application as a bathroom finding it dificult to get info on which adhesive would be best to stick to felt at moment, dont understand what woody meant about spacers.
the promenade tiles woody mentioned are thick porous tiles that are laid on hot bitumen over an asphalt or felt roof. They are spaced a few mm apart and then not pointed to allow for drainage. Check them out on google somewhere as woody mentioned.
They are simliar in shape and look( not colour) when layed to a bar of dairymilk.
They are simliar in shape and look( not colour) when layed to a bar of dairymilk.
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