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-   -   Flashing, where to get... (http://www.fornobravo.com/forum/f51/flashing-where-get-14847.html)

kombi 12-01-2010 05:47 PM

Flashing, where to get...
 
Hi guys

Just got my oven installed, it has an 8" flue which goes through a tiled roof which has exposed timbers (no ceiling). Can anyone advise where I can get a suitable flashing.

I know I can get a lead flashing but the rubber boot that goes over the flew will not stand the heat of a woodfired oven. I'm in Perth and tried a few of the usuals like Bunnings Hearth House etc. Galvins have the Lead flashing but the they reckon the red boot is only good for 200C, I'm not sure what the temps get up to but considering the heat of the oven I'm sure its higher than that.

It might need to be double skinned, but I'm tight for room with the roof timbers as I am.

The guy that does the roof work for the installer has gone on holidays for 3 weeks and I'd like to close my roof up.

Any help appreciated.

John

kombi 12-13-2010 10:55 PM

Re: Flashing, where to get...
 
Hi guys

Got no replies, so went ahead and fitted lead flashing over flue and then fitted red silicon boot over that. I was really worried what sort of heat I would get as the boot is good for around 200C. I have an infrared thermometer and it only gets up to about 50-90C at the flashing. So no real issues after all.

Hope this might be of help to someone.

John

nissanneill 12-14-2010 04:27 AM

Re: Flashing, where to get...
 
2 Attachment(s)
Hi John,
just saw your thread.
I had a similar situation and have it somewhere on my posts but have put a few pics here for you.
I used a 1" larger diameter sleeve over the 8" chimney and packed the void with superwool insulation. The silicone rubber seal is standing up to some very hot fires one that melted my downlights.
Hope this helps you.

Cheers.

Neill

glentek 08-30-2011 11:18 AM

Re: Flashing, where to get...
 
Quote:

Originally Posted by nissanneill (Post 103784)
Hi John,
just saw your thread.
I had a similar situation and have it somewhere on my posts but have put a few pics here for you.
I used a 1" larger diameter sleeve over the 8" chimney and packed the void with superwool insulation. The silicone rubber seal is standing up to some very hot fires one that melted my downlights.
Hope this helps you.

Cheers.

Neill

I'm looking for some small pieces of Superwool. I see that you purchased some to use in your oven. Do you have any scraps that you would be willing to sell? I don't need much and do not want to buy an entire roll. Thanks.

chidding 09-01-2011 07:07 PM

Re: Flashing, where to get...
 
Neill.

Was that a single wall flue or double wall?
Im getting a double wall flue, presuming i shouldnt have issues with heat then?

cobblerdave 09-02-2011 03:41 PM

Re: Flashing, where to get...
 
Check out the general construction in the forum and a thread "keeping me and my oven dry" by faith in virginia for a great homemade idea

Regards Cobblerdave

david s 09-02-2011 05:40 PM

Re: Flashing, where to get...
 
Should be fine unless you have huge flames going up the chimney. My mobile oven that I hire out occasionally gets its silicon seal around the base cooked, but it's only when people allow lots of flame up the flue.( "gee this fire is fun, lets see how much flame we can get going out the top") It never happens when I use it. The silicon I use is rated to 205 C There is higher temp silicon, but it uses carcinogens and is way more expensive. Presumably the flue pipe will be way cooler up near the ceiling too.

david s 09-03-2011 04:03 AM

Re: Flashing, where to get...
 
Neil,
I noticed that your flue pipe is standard galvanized rather than stainless. How's it holding up corrosion wise?
Dave


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