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This is exactly what we're doing, except we've had a system boiler fitted and our boiler house also has an expansion vessel and the manifold for our new underfloor heating in it.
Obviously check that there's enough space for your plumber to fit it but also check there's enough space around it for servicing. That should be in the manual.
As you've already figured the most important bit is keeping out the water. Our builders built a base from timbers with DPC membrane underneath on top of a concrete base and used marine ply, it will then be covered in larch cladding to match our fences and other stuff.
I'd worry about putting render over wood because the wood will expand/contract and as you've said it may well crack. I would also avoid a flat roof if you can but your diagram seems to show a pitch?
Also who will be responsible for making all the relevant holes for the pipes? This will need doing properly.
Flue has to exit at least 60mm from the house for building regs by the way. Ours goes straight out the top.
Fox-
Cheers, I made a start on the weekend...
Obviously check that there's enough space for your plumber to fit it but also check there's enough space around it for servicing. That should be in the manual.
Check,
As you've already figured the most important bit is keeping out the water. Our builders built a base from timbers with DPC membrane underneath on top of a concrete base
Check
I'd worry about putting render over wood because the wood will expand/contract and as you've said it may well crack.
Good point I went with concrete board over timber frame. I think it'll take a render coat okay
I would also avoid a flat roof if you can but your diagram seems to show a pitch?
Yep shallow little pitch
Also who will be responsible for making all the relevant holes for the pipes? This will need doing properly.
Yeah good point the plumber will do all the drillings.
Flue has to exit at least 60mm from the house for building regs by the way. Ours goes straight out the top.
Do you mean 60cm? Ours will come out and along the wall a bit.
Olly398
Hi all, advice welcomed on my little boilerhouse project... I have a 20 year old combi boiler in a 20-year old flat-roofed single storey kitchen extension duh out into the side return of my ground floor Victorian flat. As space is at an ultra-premium, I’d like to put the new replacement boiler in a new purpose-built little outhouse on the external face of the wall on which it is currently mounted. I will post pics to explain better.
I have a gas-registered plumber to do all the boiler related work before we get too excited. He has no issues running the services and flue. But I am planning on building the 1050H x 880W x 450D boiler enclosure myself.
So I was thinking of making a 2x2” timber-framed structure and fixing it to the walls. Two of its sides will be formed from existing walls. The third face will be a plywood pair of doors for access. I will use either plywood, pine boards or cement board to make the fouth ‘wall’ then would like to render it all to look like the existing property and repaint everything. It will have a little flat roof of plywood with roofing felt.
Questions then… should I use some kind of plastic membrane where my timber frame touches the walls so that it doesn’t absorb damp and rot? Can you use a sand/cement mixture over wood? Or will it crack and fall off due to expansion or whatnot? Thanks.