Using expanded foam to fix roof tiles

Question

My neighbour has had his roof retiled, this required a bonding gutter to be fitted. On my side of the bonding gutter the roofer used expanded foam to fix the tiles to the gutter, no mortar was used in the centre of the bonding gutter to support the tiles, My believe this is in breach of the building regulations.

Could one of your trades people help by informing me if this is against the building regulations. as expanded foam is highly inflammable it may also breach the regulations under the fire break section.

Best Regards

Mal smith

John · Accepted Answer

This is as you have stated against regulations and also not only extremely poor workmanship but it won't last 5 minutes with a frost

Harry · Answer

Hi Mal,

First of all I have not personally ever come across a roofing solution solved by expanding foam so they're has in my opinion been a corner cut somewhere. As regards for the flammability of the foam it is not all flammable and there are actually fire resistant versions that I do use for fitting doors that is not flammable. I would raise the issue with the neighbour and ask for the contact details of the roofer. If this is not something they are willing to rectify I would approach the topic with the neighbour and ask a local well recommended roofer to come and inspect the work.

Hope this helps

Keith · Answer

I'm not going into a long explanation, but that's not the correct way of doing this particular job, the roofer should know better, my advice would be get it inspected.

Marco · Answer

You are correct, it does not meet building regs and would not be fit for purpose.

Florin · Answer

Definitely not expanding foam , not for roof, only if its temporary job.

Nick · Answer

Not good to be truthful. It’s totally against building regulations and it will leak. If we get a cold snap it will go wrong   Then you could end up with a leak.  Get him back to fix it correctly without paying him for the repairs

Laurie · Answer

Expanding foam is not especially flammable but should NOT be used to fix in place any component of roof tiles and gutters or any exposed parts of a building 
Sand and cement render needs to be used i. Roofing ..not a gap filling agent like Expanding foam 
This would be snagged but any Building Inspector anc require r3moving

Doug · Answer

Hi 
I would speak to your local building controller your council will have their details. To get confirmation.As far as I’m aware expanding foam unless fire foam should not have been used if it was fire foam that would be red in colour.
To be safe I would definitely check seems like a quick cheap option was done

Peter · Answer

This is a grey area on domestic properties and mainly used as a quick fix solution against a proper nre re roof and can mask other problems so a lot of lenders to properties may not grant a mortgage on the property

Dawid · Answer

As a non roofer I can't give any proper advice on this subject . But as a building technician I can quite comfortably say that there in fire rated expanding foam on the market . Just not sure if using it on the roof is the right thing to do. Best would be to reach for advice to building surveyor. Or any local trusted roofing company.

Using expanded foam to fix roof tiles

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