Conservatory base

[Bahco]

Further to my earlier thread I now have to do the base.

I have a wall 3 bricks high and I need to fill in with concrete etc.
I have also purchased 50 mm polystyrene blocks to put in.
can you tell me how to go about this properly please.

I am toying with the idea of underfloor heating and also need to know if I should put the polystyrene on top if I decide to go this way.
Many thanks.
Carlo

 

[Mick Leek]

You have 2 choices,

Option 1, Sand binder, Visquene, polystyrene or polyethelene, then concrete on top. Under floor heating will go under the tiles OR under a screed if you intend to lay one.

Option2, Sand binder, polystyrene or polyethelene, visquene, concrete. Same applies with the under floor heating as above

I personally prefare putting the polystyrene or polyethelene under the visquene. YES the concrete does go on top of the insulation before you ask... Its MAGIC

You get the same benefit from 65mm of polyethelene against 100mm of polystyrene, so if depth is an issue you have a choice. Polyethelene is more expensive though.

 

[Mr Winston]

Mick,

shoot me if im wrong but............ polyethelene is just another name for polythene (visqueen type material) .

I think (if you mean the kingspan/celotex/xtratherm insulations) youre refering to polyurethane which is as you say better at insulating than polystyrene, and as my nans parrot used to say, polywantacracker


try www.celotex.co.uk for some guides - it has many useful installation guides for walls/floors/roofs

Bahco,

in addition to what Mick said you will also need to have a compacted hardcore base to lay all this onto (unless thats what your previous post was all about). The hard core should itself be based on firm loadbearing ground - same as your foundations

 

[Mick Leek]

Mr Winston,

You are indeed correct I take my hat off to you........ always get my polys mixed up

stand corrected.

 

[Bahco]

Thanks fellas