|
6. |
The Roof
Rafters
Cut the remaining eight intermediate rafters (see
'Rafter Detail'
drawing) and fix in place, four
each side. Spacings are shown in
'The Roof Plan'. |
|
7. |
Roof
Noggings
Measure and cut four rows of Noggings that will fit
between the Rafters. Place the rows each side of the
Side Wall's top plates (see Picture). This is so the
exterior Boards and Battens will have a straight
edge at the top to butt into.
The same applies to any likely interior lining,
should you choose to use it. |
|
8. |
Roof
Sheathing
Cover the floor with 12mm (1/2) inch plywood,
nailing a maximum of 200 (8") apart on all Rafters.
Run the sheets from the Roof Beam to the ends of the
Rafters. The sheets will need trimming.
All joins running parallel with the Rafters, must be
on a Rafter. Any necessary join running parallel
with the Roof Beam, must be under a Purlin. |
|
9. |
The
Purlins
Nail three rows of Purlins to each plane (side) of
the roof, overhanging each side of the gables by
25mm (1") or the thickness of the exterior vertical
Boards.
Fix the top row about 75 (3") down from the apex
(this measurement will depend upon the width of the
Ridge Capping, as the Ridge Capping is fixed to the
top purlin), the bottom row vertically flush with
the end of the Rafter and another row in the middle.
Nail the ends of the Roof Sheathing (from the
underside) to the bottom purlins.
|
|
10. |
Fascia,
Barge and Roof Underlay
Nail the Barge Board to the end of the Purlins up
along each rake of the gable and flush with the top
of the Purlins.
Join the Barge Boards at the apex (vertical cut) and
cut the other (lower) end vertically, 175mm (6")
past the rafter (lower) ends.
Cut and fix the fascia Board in between the Barge
Boards and to the Rafter ends. The top edge of the
Fascia Board should be flush with the top of the
bottom Purlin.
Cover the roof with a self-supporting Underlay prior
to the Corrugated Roofing Iron going on. |
