Hello
The idea is to lay a wooden deck and cover the entire slab. I want to build up as little as possible to avoid problems at the door. Is it enough to use, say, 45*90 lying as joists directly against the slab and screw 28*120 decking onto these? Will the deck bounce when you walk on it, or will it lie stable just from the weight? It's approximately 25m2.
For water drainage to work, perhaps the joists shouldn't lie directly on the slab. Should I nail some kind of feet on, or is it enough with roofing felt between the wood and stone? I might use scraps from the decking and nail them under the joist to get the spacing. Can I just as well make cutouts in the joist to avoid raising the floor more?
The idea is to lay a wooden deck and cover the entire slab. I want to build up as little as possible to avoid problems at the door. Is it enough to use, say, 45*90 lying as joists directly against the slab and screw 28*120 decking onto these? Will the deck bounce when you walk on it, or will it lie stable just from the weight? It's approximately 25m2.
For water drainage to work, perhaps the joists shouldn't lie directly on the slab. Should I nail some kind of feet on, or is it enough with roofing felt between the wood and stone? I might use scraps from the decking and nail them under the joist to get the spacing. Can I just as well make cutouts in the joist to avoid raising the floor more?
I'm "borrowing" this old thread. I am going to build a deck over an old poured concrete slab and am considering how best to do it. Conditions:
- poured concrete slab in good condition (possibly since the house was built in '52)
- the slab is along the house between a "conservatory" (which is about 1m up) and the garage.
- the exit to the deck will be from the conservatory and therefore I want to build the deck about 50-60cm above the concrete slab. Partly to avoid building permit requirements and not to be too high against the street/neighbors.
- I want to prepare for possible roofing ()/glazing?) in the future but preferably not have any posts in the way now.
My first thought was to lay beam on beam (220x45?) and then 28x120 on top of that and get a floating floor, but maybe that's not suitable if I want to add a roof eventually? or perhaps it's fine to make that construction separate from the floor? What are the different thoughts on this and what are the pros/cons of different methods?
I would like to keep costs low but at the same time build something durable and not too shabby looking. I have skilled craftsmen to help but would like to form my own opinion on different approaches before letting anyone loose.
I also have a basement window that I was thinking of building over. Pros/cons with that? I might consider closing it off completely in some way.
Grateful for help //D
- poured concrete slab in good condition (possibly since the house was built in '52)
- the slab is along the house between a "conservatory" (which is about 1m up) and the garage.
- the exit to the deck will be from the conservatory and therefore I want to build the deck about 50-60cm above the concrete slab. Partly to avoid building permit requirements and not to be too high against the street/neighbors.
- I want to prepare for possible roofing ()/glazing?) in the future but preferably not have any posts in the way now.
My first thought was to lay beam on beam (220x45?) and then 28x120 on top of that and get a floating floor, but maybe that's not suitable if I want to add a roof eventually? or perhaps it's fine to make that construction separate from the floor? What are the different thoughts on this and what are the pros/cons of different methods?
I would like to keep costs low but at the same time build something durable and not too shabby looking. I have skilled craftsmen to help but would like to form my own opinion on different approaches before letting anyone loose.
I also have a basement window that I was thinking of building over. Pros/cons with that? I might consider closing it off completely in some way.
Grateful for help //D
The best way if you want to raise a concrete slab is to lay out lecablocks directly on the slab. You attach the beams between the garage and the conservatory, and the lecablocks support the beams from underneath with an appropriate cc measurement to eliminate sway. Build with pressure-treated wood and place pieces of roofing felt between the concrete and the wood. The lecablocks are easy to cut to the right height with a reciprocating saw or cut-off wheel.