WDS Ultra Board?

[spinal]

A query - has anyone used the WDS Ultra board that kiln-linings stock?

I was planning on using vermiculite board, but saw that, and the thermal conductivity look impressively low. I'm thinking I could even get away with 25mm of board instead of the 50mm-100mm of vermicultie board originally planned.

That said, it is quite expensive (would cost me £160-£240 to go under the hearth at 25mm thick) compared to vermiculite board...

M.

[Fat Bob]

Spinal that would buy a lot of beer or loads of pizzas!

Do you think the Romans used these modern materials?

Apologies for not answering your question - I am a luddite....

[spinal]

I'm a geek and a firm believer in technology - the Roman's wouldn't have used high-tech insulation... but then again, they wouldn't be on a cyber forum asking questions, nor would they be too worried about invading a tiny island to get some more wood to keep their ovens going

On the other hand - I need to get my oven as efficient as possible, mainly because I'm VERY lazy and don't want to be cutting wood all day

M.

[turkey]

in all things like this I would say phone Liam at kilnlinings and ask his advice, I am fairly sure when I spoke to him he said 25mm of the regular stuff was fine for an oven build but I could very well be wrong.

when planning this there are 3 parts, thickness to get desired hearth height, cost and insulating properties.

if you have a high hearth and need a very thin layer a super high tech solution might be worth the extra expense, or it might be better to have more of a cheaper material as I have no idea how each of these perform, the WDS might shrink / expand more with heat than other solutions or might not be great under compressive load. I am sure it details these on the site but Liam can put that into pizza oven build scenarios for you.

I went cheap cheap with thermalite clone blocks as they where cheap and easy to lay and seem very insulating, if I had the cash I would have still used these and put a thin layer of regular ceramic fibre board on top to lay the bricks on.

I am however also a geek and love technology but trying to channel that into old world tools and learnings, planning to make a small rocket hob when the wife is not looking to pre heat the oven ans might even see if I can get a pan holder on it so I could cook on it when using the oven or BBQ, low tech but still great fun.

[spinal]

You've hit the nail on the head regarding the three properties...

Height/thickness - I've blown that already... that said, I'm planning on putting some stones on the floor (slate maybe) so it'll work out in the end...

So it's really down to cost/conductivity.

I've put down 10cm of vermicrete, and was planning on putting a further 10cm of ceramic blanket (overkill, I know... but I really do want it to be over-insulated!)

Will give "Liam" a call at some point then! Going to measure the base properly tonight so that I can calculate exactly how many sheets I can get away with...

M.

[faz]

Blanket would not be a good idea for the floow, as it will compress and lose its insulating properties the moment you put the floor/dome on top. Board, vermicrete or thermalite blocks are your options as far as I can see.

[spinal]

Sorry - meant board, not blanket

Even though, a blanket would work quite well with a rigidizing agent... but then it would just be a board
M.