WDS Ultra

[DuncanM]

Hi All,

I'm planning my door at the minute and I want to use the best insulative material possible for it, which after looking on Liam's site I noticed the WDS Ultra which is apparently better than CF. Has anyone had any experience with this stuff? is it rigid enough to be exposed to the heat directly and sturdy enough to be used without covering?

[pete123]

I can't answer your question with any authority but I plan on making my door out of the left over Calsi Board I used under the floor. From memory the WDS Ultra was Ultra expensive.

I'm sure Liam would be happy to answer if you e-mail him. The Calsi board was very light but I wouldn't use it without something to protect it (not sure what though?) Also I suspect you would want something around it in case it rained & got wet.

Also you might need to attach a handle to it?

[turkey]

I think kiln linings has a minimum order value so would check the practically of ordering it also.

I am thinking door thoughts, but not come up with anything practices or importantly cheap.

[DuncanM]

My plan (cost dependant) is to have two semi circles, one a few mm smaller than my oven entrance one larger. The smaller one would be made out of WDS Ultra and attached to the larger one made of oak. It would be fastened by high temp glue (if that's suitable -else I'd screw it) and the oak would have a double fire-rope seal on it. I'd push the WDS ultra inside the oven entrance and the larger wooden one would stay under the2nd arch which supports the chimney. I'd then attach handle to the oak.

I've emailed Liam last night, just awaiting a response. I'll upload a google sketch up model later this evening to show what I mean.

[DuncanM]

Liam replied, WDS ultra isn't suitable to see a flame, so thinking what I can use instead.

Some pics on google sketch-up:

Front of door (what you'd see when it was in place) I would have some sort of handles though.



Blue = insulation (WDS Ultra or whatever I decide to use)
White = firerope

[scottme]

Have you considered using a metal facing plate on the oven-facing side of the door? That would protect your WDS Ultra from eventual flames.

[DuncanM]

Yes I have, but my main problem is I have absolutely no way and no knowledge nor tools to get a piece of metal like that so I'd have to get someone else to do it.

Also what's the expansion rate of metal? (I know it differs per metal) but I want a tight fitting and don't want the metal pushing upwards on the arch if it expands. Thoughts?

[turkey]

Could you skim it in proper firecement? you could get some from KL or I think a small tub from B and Q is about a fiver. This is supposed to see fire, and also sets quite hard when heated, I doubt it expands much or would cause cracking in fireplaces / chimneys.
It might be hard to make a smooth pretty surface but is probably sandable and not really visible anyhow ?

High temp silicone would probably glue it on and is suitable for high temp application (but should not be so hot as is behind the insulation).

I think I would say you want one of the firerope gasgets around the rim of this insulation layer to act like a plug/stopper as you really want to stop anything getting to your oak door as its expensive firewood it will help to fit the slightly irregular shape or a brick arch.