Gas pipe under floorboards and new insulated ceiling

emsie85

Hi all

We are having a new boiler installed and that will require a gas pipe to be fitted under the floorboards of a bedroom that's over the garage.

We are also separately having a new ceiling put up in the garage, with insulation rockwool or eathwool and celotex insulation backed plasterboard so keep the bedroom above warmer.

Should I be worrying about gas or fire safety here? We are having the ceiling done this week and the boiler done in August but I can't ask the boiler guy at the mo as he's on holiday, hence why I'm asking here first.

Thanks

Owain_Moneysaver

As I understand it, the gas pipe must not run through a void unless the void is ventilated. That would affect the insulation properties.

I would suggest running the gas pipe below the new ceiling in the garage space as much as possible, then where it passes up through the wall/ceiling it will have to have an intumescent pipe collar.

Your existing garage ceiling might not be to current fire standards but the new ceiling may have to be.

emsie85

Thank you. Would this be affected in the future if we converted the garage to a room?

Owain_Moneysaver

If it were a habitable room it probably wouldn't need the fire resisting ceiling - requirements for garages are more stringent in that respect.

ComicGeek

I think you're doing it the wrong way round. You should do the gas pipework first and then the ceiling.

You can install the copper gas pipe in a CSST sleeping, which is a continuous corrugated plastic conduit for the gas pipe. This is then vented at either end (ie outside and at the boiler) thereby eliminating the need to ventilate the ceiling void. This would be better protection than an exposed gas pipe below the ceiling.

southcoastrgi

Running the gas pipe under the floor boards & across or with the joists is fine, it's not considered a void, it would be sensible to protect it across the joists with purpose metal plates to prevent damage from the boards being nailed down, something like this

https://www.toolstation.com/safe-plate/p20903?store=HK&utm_source=googleshopping&utm_medium=feed&utm_campaign=googleshoppingfeed&gclid=EAIaIQobChMIrcOAwt-64wIVmKztCh311QeeEAQYAiABEgK4DfD_BwE