On 4 Aug, 21:43, Kipper at sea wrote:
On Aug 4, 4:28*pm, sm_jamieson wrote:

Right, doing my extension roof soon. Under-felt vented cold roof with
over-fascia vents (no soffits),
profiled concrete tiles.
As I understand it the eaves venting components are fitted as follows:
Fascia board (fixed to rafter ends).
On top of the fascia board goes the over-fascia vent.
Over the vent goes a felt support tray with the felt on top of it.
Over this goes the comb filler to fill the profiled tile voids. But,
how do you fix this without penetrating the felt ? And you surely
can't nail through the comb, felt, felt support tray and over-fascia
vents in order to fix it ?
Can someone explain how this is done.
Cheers,
Simon.

Get the all in one over fascia felt support vent with comb,
interlocking type.
All you do is nail the unit into the rafter at one end only at the
top, interlock the next one. Nail at top again one end only and carry
on. When completed, nail to every rafter at the top of the units. *The
underlay sits at the bottom at the back of the comb. Its best to fit
the units after lathing and felting but fit one on first to get the
correct over hang and up stand of the first course of tiles in to the
gutter. Don’t forget that the fascia board stands up above the rafter
foot 2" or 50mm for tilt. The units come in 25mm and 50mm up stand
vent. This must be taken into account when fixing the fascia board.

Thanks for that. Where can you get the combined unit from ?
Simon.