Effective from 12-Nov-20
Page | 9
NOTE: The roof vent may be positioned in any of the Tunnelhouse sections; however, you cannot fit the roof vent in a section
directly beside another section that might already have a roof vent.
(This is because the ends of the vent require clearance for an overlap.
NOTE: When you have decided which section to place the roof vent in, you will need to cut and remove the ridge purlin in that
section. see (Pic V1) next page
1.
Before fitting the roof and side covering - Lift the roof vent complete into place at the apex of the Tunnelhouse, - the ends of
the roof vent upstands will rest on the top face of the hoops.
2.
Screw the four “L brackets” onto the flat side face of the tunnel hoops. see (Pic V1) next page
3.
Before you fit the cover onto the building stage 4. - You will need to disconnect the roof cap by undoing the four bolts that
hold the vent in place on the upstand. Remove the roof folded cap and aluminium vent arms + handle completely. (this will
be re-fitted later)
4.
With the vent removed, you can now proceed to fit the main roof cover.
(Pic V1) Vent “L” Bracket x 4, Vent rails Vent Upstands (Pic V2) Roof vent cap and Vent arms + Handle
Note: The ridge beam purlin should be removed from the vent location space; the vent rails replace the ridge purlin in the vent space.
IF YOU HAVE A ROOF VENT OPTION
After the main roof and sidewall covering has been fitted, - you can re-fit the cap vent (see pictures below)
1.
In the section where the vent is to fit – Use a knife or scissors to slice the cover at the center apex for the length of the roof
vent rails
2.
Then slice the cover toward the corners of each vent rail. See (Pic V4) below
3.
Insert the Lockstrip holding system into each of the vent upstand rails
4.
Insert a 100mm piece of Lockstrip clips x 2 into the top edge of the hoops at each end of the roof vent (this goes
between the vent rails)
5.
Secure the edge of the cover onto the top edge of the upstand using the white Omega clips provided see(Pic V5) below
6.
Trim the excess film behind the Omega clip and also at the end of the roof vent opening away
7.
Re-locate the roof cap and aluminium arms + handle up into place and re-connect the nuts/bolts/washers to the upstand.
8.
Test the roof vent for open / close action and adjust if needed.
