Temp of single wall flue

[David Riding]

Bough a flashing online today for a single wall flue of log burner that goes through a slate roof in an out building, sold as high temp resistant l but max temp for rubber on spec says 150 Celsius, I presume flue 6 foot above log burner could get hotter than that??

[Alycidon]

You are not allowed [ Approved Document J 2010 ] to go though ANY wall or ceiling or roof with single wall pipe. These are penetrated using insulated twin wall tube. Who is signing the installation off as safe to use, no sign off and your insurer will refuse to pay if you ever have a fire. Insulated maybe ok, dont forget combustibe clearance to rafters, this varies, cheap web sold pipe usually needs larger clearance than Poujoulat pipe I use. Combustible clearance on single wall is usually a MINIMUM of three times the diameter.

 

A

[niftysteve]

as above you will need a section or 2 of twin wall to go throught a roof even that needs 50mm clearance from combustables

[David Riding]

Please read my original post it's a freakin "out building" with a bit of roof cover for an outside log burner like a pizza oven!! I didn't ask for advice on building regulations as I have 2 log burners in my house,

now if someone could come back to me and answer the question I asked it would be appreciated.

[Justme]

Yes it will be hotter than that.

 

High temp flashing is normally red.

[niftysteve]

put it through slates then use 300 degree silicone to seal, but if flue temp gets so hot and rafter close it(within 3 time s the flue measurement)it could catch fire

[County4x4]

We have one of these taking the flue from our workshop stove through the roof - had no problems at all with it.

 

Dektite high temperature workshop flue pipe roof flashings

 

Andy

[Alycidon]

Please read my original post it's a freakin "out building" with a bit of roof cover for an outside log burner like a pizza oven!! I didn't ask for advice on building regulations as I have 2 log burners in my house,

now if someone could come back to me and answer the question I asked it would be appreciated.

 

No offence intended, I was under the inpression that the lean to adjoined your house. I have recently seen 2 remote farm sheds catch fire in similar circumstances to that you propose, one after I had advised the owner of the danger, he went ahead anyway and lost his shed roof or at least most of it.

 

A