Gas flue in catio

cathymaker

I had a catio installed last year and my gas engineer this week says the roof is too close to the flue but he seemed unable to offer a solution apart from taking the polycarb roof off, which basically defeats the object of keeping the cats safe as they'd soon leg it. Engineer says a mesh roof can't be used instead btw. Anyone know if cutting an area of the roof so it has a clearance of say say 2 ft all round would solve the problem?

Section62

cathymaker said:

I had a catio installed last year and my gas engineer this week says the roof is too close to the flue but he seemed unable to offer a solution apart from taking the polycarb roof off, which basically defeats the object of keeping the cats safe as they'd soon leg it. Engineer says a mesh roof can't be used instead btw. Anyone know if cutting an area of the roof so it has a clearance of say say 2 ft all round would solve the problem?

A picture or two would help us give you ideas.  One possibility - although the gas engineer could have suggested it if it was practical - might be a flue extension kit to take the flue up above the roof or out to one side.

stuart45

Might be worth giving the boiler manufacturers a call to ask about their regs for going through the roof. Gas engineers sometimes have different interpretations of the regs. 
A twin wall flue shouldn't be an issue for a gas boiler heat wise.

FreeBear

stuart45 said:

Might be worth giving the boiler manufacturers a call to ask about their regs for going through the roof. Gas engineers sometimes have different interpretations of the regs. 
A twin wall flue shouldn't be an issue for a gas boiler heat wise.

A catio with a polycarbonate roof & mesh sides would probably count as a carport as far as the regs are concerned. Depending on where windows/doors/vents are in relation to the flue terminal, the catio roof may not be an issue (subject to suitable clearances).

Worcester Bosch issued a technical bulletin covering carport issues -> https://www.worcester-bosch.co.uk/support/literature/download/TB0127a

cathymaker

Section62 said:

cathymaker said:

I had a catio installed last year and my gas engineer this week says the roof is too close to the flue but he seemed unable to offer a solution apart from taking the polycarb roof off, which basically defeats the object of keeping the cats safe as they'd soon leg it. Engineer says a mesh roof can't be used instead btw. Anyone know if cutting an area of the roof so it has a clearance of say say 2 ft all round would solve the problem?

A picture or two would help us give you ideas.  One possibility - although the gas engineer could have suggested it if it was practical - might be a flue extension kit to take the flue up above the roof or out to one side.

I'm selecting photos but I don't think they're attaching.   Says something in the rules about having to be a member a while longer.  I don't know if they'll eventually attach in triplicate or not at all. 

Albermarle

cathymaker said:

Section62 said:

cathymaker said:

I had a catio installed last year and my gas engineer this week says the roof is too close to the flue but he seemed unable to offer a solution apart from taking the polycarb roof off, which basically defeats the object of keeping the cats safe as they'd soon leg it. Engineer says a mesh roof can't be used instead btw. Anyone know if cutting an area of the roof so it has a clearance of say say 2 ft all round would solve the problem?

A picture or two would help us give you ideas.  One possibility - although the gas engineer could have suggested it if it was practical - might be a flue extension kit to take the flue up above the roof or out to one side.

I'm selecting photos but I don't think they're attaching.   Says something in the rules about having to be a member a while longer.  I don't know if they'll eventually attach in triplicate or not at all. 

I think you have to have posted at least 10 times.
Anyway now I know what a Catio is , as I had never heard of it before 

WIAWSNB

It might be based on number of posts? Keep posting! How was your day? Been anywhere nice recently?

This catio - had to look that up - is presumably a free-standing construction? In which case an option is unlikely to be that a flue extension - 'plume kit' - could be used to take the flue up through the poly roof and above. So, more likely, it'll need diverting out and around, as S62 suggested.
But, photos!

cathymaker

WIAWSNB said:

It might be based on number of posts? Keep posting! How was your day? Been anywhere nice recently?

This catio - had to look that up - is presumably a free-standing construction? In which case an option is unlikely to be that a flue extension - 'plume kit' - could be used to take the flue up through the poly roof and above. So, more likely, it'll need diverting out and around, as S62 suggested.
But, photos!

It's 3 sided and attached to the kitchen wall which unfortunately is a one storey so my gas engineer muttered something about he could use a plume kit but didn't know what he could attach it to. Wish I could post the photos. I can't even reply to Stuart45 because the 'quote' includes the link he's kindly sent me. I can't post links yet either it seems!

WIAWSNB

Keep posting!
So your GS has suggested a plume kit might work, but is not sure how to secure it. That's promising.
Obvs, when you replace the catio, you'll need a GS out again.

cathymaker

Photos.  I hope!

WIAWSNB

Well done - and good photos. 

I never realised a catio could be such a beautiful addition to a home. cough

There is a bargeboard immediately above the poly roof, and a plume flue bracket could almost certainly be attached easily to that. Only the shortest of flues would be needed. The awkward bit is getting access to it!

A nice clearance hole through your roof to take the pipe - it's only 3" dia - with a flexible rubber gasket to prevent rain coming through.

Could a crawl board be paced along that roof, supported at each end by the timber frame? I guess it must be possible, as how else did they secure these roof panels down?

Or, perhaps the builder of that amazing construction could remove the required roof panel, allow the flue pipe to be fitted, and then replace it with a suitably-size U-slot cut. It obviously mustn't make contact with the pipe, and you'd have to clear this option with the GS first.