On 28/05/10 18:15, John Rumm wrote:
On 28/05/2010 16:44, Tim Watts wrote:
Hi,

Anyone familiar with these:

http://www.roofinglines.co.uk/produc...cia-vent-strip

?

Recap - need to vent the dormer facias, there is no soffit, so has to go
in the fascias.

Or use a vent tile, or strip some tiles, and replace the under felt with
breathable one.

I presume these are designed to screw to the top of uPVC fascias?

Looks like it...

I guess these things might be retro-fittable if I can get the uPVC
fascia off (ie is the roof felt stuck to it or not - only trying will
tell[1]), sticking one of these on top and refitting the fascia dropped
by about an inch. OK it will no longer line up with the edge fascias,
but I don't think anyone will notice at that height.

You could always chop a bit off the top of the facia

[1] If the felt (which was hot-tarred on) is, is it viable to release
the felt by application of a suitable gas torch?

Ah, is this a flat roof?

Yes...

Sticking the stuff with a gas torch is easy enough - not sure I would
want to try and free one though!

Seeing if it can be prised off cold would probably be easier.

Good news... I've just managed to lean far enough out of an upstairs
window to get a bit of a look underneath. The felt hangs into or over
the gutter (I think, couldn't see that bit). The fascia b


The other option is hole-sawing or jisawing big holes in the front and

or multimastering - you know you want to ;-)

gluing a louvred gas vent+insect screen on - but I'm less confident
about the air flow and rain proofness of that idea...

Louvred vents with the fins pointing down is probably the best you will
achieve in that respect... I ought to be no worse than an air brick.

And there was another option John R came up with last time round of
using flat ventilation 90 degree turns as rain proofing, but that, while
very convincing will be a bit fiddly too.

If you are taking the facia off, then it would be fairly easy to cut a
slot and poke one end of a L shaped vent through from the back. Allowing
air in, but requiring water to make a vertical ascent after entry.




--
Tim Watts

Hung parliament? Rather have a hanged parliament.