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Thanks for your responses; confirms what I thought. a 1m x 25mm (I think) 'notch' has been cut in the top of the facia to accommodate the vent(s), so adjacent tiles are on the same level.

Hi. I've just had the above replaced with UPVC. The installer has provided over-facia vents (10mm); 1m vent every 5m, which he states is sufficient. Is this right? The roof span is 4.8m x 8.8m long (pitch is greater than 15 degrees). I've read BS5250 (and other advice) and it...

Gents - thanks for your replies. That puts my mind at rest. I take it that it's not unusual for the expansion pipe to get hot a 4-5ft from the junction with the boiler flow pipe? Thanks again.

Hi. Few weeks ago I found condensation in my loft. I've been in the house about 18 months and had never noticed it before, although the insulation is dirty and some of the rafters look discoloured (although they seem sound enough) so I suspect it's not the first time this has occurred...

Feed pipe