Posted: Wed Apr 11, 2007 12:17 pm
Hi there, I've had a quick flick through the forum and cannot see an obvious answer to my query.
Anyway, here's the outline:
(1) I'm planning on building a wooden frame workshop in section of land at the bottom of the garden
(2) The workshop will be roughly 4800x6000mm area (with pitched roof, 3400mm at apex, 2400mm at wall height)
(3) I have some underfloor heating pipe and polystyrene insulation left over from a previous extension build so I would like to incorporate that in to the project. The integrity of the UF heating is not that vital in the long run, it's just a use for the stuff that I have left over.
Here's the rough groundwork thinking:
(1) Dig out to about 300mm depth and put 100mm of dtp1 sub base
(2) Put a 100mm concrete base on this
(3) Put the underfloor heating stuff on this (use kingspan or similar where there is not enough pipe)
(4) Screed on top of piping
(5) Chipboard on top of screed (to protect it and provide a bit of weight distribution)
Here's my main query:
I am hesitant about pouring a 2.7 cubic metre concrete slab on to the hard core. I don't know how permanent I want the structure to be.
Could I use concrete blocks (440x215x100mm breeze blocks or similar) laid on their faces) with some kind of mortar (dry mix) as the bedding and pointing/grouting/
The cost of the blocks is on a par with that of the poured concrete slab and I figure that the weight distribution from above would be quite even (once it has worked its way down through the other layers)
(as an extra - where would the best layer for the DPC be?)
Anyway, here's the outline:
(1) I'm planning on building a wooden frame workshop in section of land at the bottom of the garden
(2) The workshop will be roughly 4800x6000mm area (with pitched roof, 3400mm at apex, 2400mm at wall height)
(3) I have some underfloor heating pipe and polystyrene insulation left over from a previous extension build so I would like to incorporate that in to the project. The integrity of the UF heating is not that vital in the long run, it's just a use for the stuff that I have left over.
Here's the rough groundwork thinking:
(1) Dig out to about 300mm depth and put 100mm of dtp1 sub base
(2) Put a 100mm concrete base on this
(3) Put the underfloor heating stuff on this (use kingspan or similar where there is not enough pipe)
(4) Screed on top of piping
(5) Chipboard on top of screed (to protect it and provide a bit of weight distribution)
Here's my main query:
I am hesitant about pouring a 2.7 cubic metre concrete slab on to the hard core. I don't know how permanent I want the structure to be.
Could I use concrete blocks (440x215x100mm breeze blocks or similar) laid on their faces) with some kind of mortar (dry mix) as the bedding and pointing/grouting/
The cost of the blocks is on a par with that of the poured concrete slab and I figure that the weight distribution from above would be quite even (once it has worked its way down through the other layers)
(as an extra - where would the best layer for the DPC be?)
