Specification
for Double S Homes Engineered Rafter System - April 2009
MAIN FLOOR
SYSTEM
6" foam sill gasket
2" x 6" pressure treated sill Plate
2" x 10" floor joist @16" centres
2" x 10" perimeter joist
2" x 2" bridging R28 - 8" fibreglass
EXTERIOR WALLS
- PREFABRICATED
0.5-4' x 8' plasterboard
6 mil. U.V. protected polyurethane interior envelope, tuck tape and
acoustic sealant Pressure Treated.
2" x 6" double top plate, single bottom plate
Pressure Treated 2" x 6" vertical timber studs @ 16" centres
R20 - 5.5" fibreglass
Pressure treated 0.5"- 4' x 8' plywood exterior sheathing Typar house
wrap exterior envelope, sealed joints
1 x 8 pre-stained cedar channel factory applied to part external walls
INTERIOR
PARTITIONS
0.5" - 4' x 8' plasterboard on both sides
2" x 4" or 2" x 6" double top plate, single bottom
plate
2" x 6" vertical timber studs @ 16" centres
INTERNAL
JOINERY
Flat sliced red oak, hollow core interior doors and bi-folds
Hemlock jambs
Clear hemlock, door and window facings
1" x 6" vertical grain fir window sill
1" x 5" vertical grain fir window liners
Clear hemlock skirting and interior mouldings
1" x 6" Western pine liner to all vaulted ceilings
Passage and privacy - Weiser lock sets
LOFT or SECOND
FLOOR SYSTEM LOFT
0.5" plasterboard 2" x 10" floor joist @ 16" centres
2" x 10" perimeter joist 2" x 2" bridging
R28 - 8" fibreglass
5/8" T & G Plywood flooring and floor glue
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ROOF SYSTEM
½" - 4' x 8' plasterboard/1" x 6" Western pine
14" engineered rafters @ 24" o.c. Engineered Horizontal Glulam
Beams
R40 - 12" fibreglass
½" - 4' x 8' plywood roof sheathing with 'H' clips
11/8" x 14" OSB rafter box
1" x 6" & 1" x 10" pre-stained cedar Fascia / Barge
boards
1" x 6" T & G pre-stained cedar soffits
4" soffit plugs or continuous vinyl vent
2" x 6" rafter blocking
INTERIOR STAIRS
Douglas fir / Hemlock stairs
Clear cedar railings
WINDOWS and DOORS
Vinyl windows with trickle vents, Low E / Argon, rollo style opening with
insect screens on all openers
6 Panel insulated steel doors
Low E / Argon glazed insulated vinyl sliding doors
Exterior windows
and doors are factory applied (where possible)
HARDWARE
All nail joist hangers, frame anchors, glues and caulking to erect package
PLANS
Complete sets fully detailed for Planning Permission, Building Warrant and
Construction Purposes
OPTIONS
Fibreglass insulation to all interior walls, pressure treated decking with
Cedar railings, hardwood floors, 30 year fibreglass composite shingles and cedar
to all exterior walls.
An up-to-date price guide is available on request. It is not published
online because of constant currency fluctuations.
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