Have an old Potterton Kingfisher boiler and external section of flue was removed to render wall, does it need anything special to seal, previously just had a bit of silicon around it. 
Flue Seal
- Thread starter foxhole
- Start date
Seal what to what?
Flue to boiler? Or flue opening in wall?
Flue to boiler? Or flue opening in wall?
get an rgi to do the job as if you make a mistake it could be very costly
Back plate of flue where it meets the wall, previously any gap [pebble dashed wall originally]would cause the pilot light to be blown out.It fixes to the wall with just a single fixing, centre top and bottom.
get an rgi out get wrong and it could kill you
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