1) Where lumber, wood shingles, shakes, fibre-cement
shingles, planks and sheets, plywood, OSB, waferboard,
hardboard, vinyl, aluminum or steel, including trim and
soffits, are installed as cladding on wood-frame walls
exposed to precipitation, the cladding assembly shall comply
with
a)Subsections 9.27.2. to 9.27.13., or
b)Part 5.
2) Where stucco is installed as cladding on
wood-frame or masonry walls exposed to precipitation, the
cladding assembly shall comply with
a)Subsections 9.27.2. to 9.27.4., and Section 9.28., or
b)Part 5.
3) Where masonry serves as cladding on wood-frame or
masonry walls exposed to precipitation, the cladding
assembly shall comply with
a)Subsections 9.27.2. to 9.27.4., and Section 9.20., or
b)Part 5.
4) Where asphalt shingles are installed as cladding
on wood-frame walls exposed to precipitation, the cladding
assembly shall comply with
a)Subsections 9.26.7. and 9.27.2. to 9.27.4., or
b)Part 5.
5) Where cladding materials other than those
described in Sentences (1) to (4) are installed, or where the cladding materials described in Sentences (1) to (4) are installed on substrates other than those identified in Sentences (1) to (4), the materials and installation shall comply with Part 5.
1) Except where exterior walls are protected from
precipitation or where it can be shown that precipitation
ingress will not adversely affect occupant health or safety,
exterior walls shall be designed and constructed to
a)minimize the ingress of precipitation into the assembly, and
b)prevent the ingress of precipitation into interior space.
(See Appendix A.)2) Except where exterior walls are protected from
specific mechanisms of deterioration, such as mechanical
impact and ultraviolet radiation, exterior walls shall be
designed and constructed to minimize the likelihood of their
required performance being reduced to an unacceptable level
as a result of those mechanisms.
(See Appendix A.)
1) Except as provided in Sentence (2), a cladding assembly is deemed to have a
capillary break between the cladding and the backing
assembly, where
a)there is a drained and vented air space not less than 10 mm deep behind the cladding, over the full height and width of the wall (see also Article 9.27.5.3.),
b)an open drainage material, not less than 10 mm thick and with a cross-sectional area that is not less than 80% open, is installed between the cladding and the backing, over the full height and width of the wall,
c)the cladding's components are non-insulating type, hollow-backed aluminum or vinyl and are horizontally oriented and loosely fastened to the backing substrate.
[Rev. 1, B.C. Reg. 108/2007.]
d)the wall is a masonry cavity wall or the cladding is masonry veneer constructed according to Section 9.20.
2) The drained and vented air space, and drainage
material described in Sentence (1) may be interrupted by
a)penetrations for windows, doors and services,
b)flashing, and
c)furring, provided the furring does not make up more than 20% of the furred area.
3) Where a construction projects over the top of the
drained and vented air space described in Clause (1)(a) or over the drainage material described in
Clause (1)(b), the air space or drainage material
shall not be contiguous with concealed spaces in the
projecting construction.
4) Exterior walls exposed to precipitation shall be
protected against precipitation ingress by an exterior
cladding assembly consisting of a first plane of protection
and a second plane of protection, where such walls enclose
spaces of residential occupancy or spaces that directly serve spaces of residential occupancy.
5) Except as provided in Sentence (6), exterior walls exposed to precipitation shall
be protected against precipitation ingress by an exterior
cladding assembly consisting of a first plane of protection
and a second plane of protection incorporating a capillary
break, where
a)the number of degree-days is less than 3 400 and the moisture index is greater than 0.90, or
b)the number of degree-days is 3 400 or more, and the moisture index is greater than 1.00.
(See Sentence 1.1.3.1.(1) and Appendix C for information on the moisture index.)6) In exterior walls described in Sentence (5), the first and second planes of protection need
not incorporate a capillary break, where
a)it can be shown that omitting the capillary break will not adversely affect the performance of the building assemblies,
b)the building is an accessory building, or
c)the wall
i)is constructed of non-moisture-sensitive materials, and intersecting or supported floors are also constructed of non-moisture-sensitive materials, or
ii)is constructed as a mass wall of sufficient thickness to minimize the transfer of moisture to the interior.
1) Where walls required to provide protection from
precipitation comprise cladding assemblies with first and
second planes of protection,
a)the first plane of protection shall
i)consist of cladding with appropriate trim, accessory pieces and fasteners, and
ii)be designed and constructed to minimize the passage of rain and snow into the wall by minimizing holes and managing precipitation ingress caused by the kinetic energy of raindrops, surface tension, capillarity, gravity, and air pressure differences (see Subsection 9.27.4.),
b)the second plane of protection shall be designed and constructed to (see Subsection 9.27.3.)
i)intercept all rain and snow that gets past the first plane of protection, and
ii)effectively dissipate any rain or snow to the exterior, and
c)the protection provided by the first and second planes of protection shall be maintained
i)at wall penetrations created by the installation of components and services such as windows, doors, ventilation ducts, piping, wiring and electrical outlets, and
ii)at the interface with other wall assemblies.
1) A clearance of not less than 200 mm shall be provided
between finished ground and cladding that is adversely affected
by moisture, such as untreated wood, plywood,
OSB, waferboard and hardboard.
2) A clearance of not less than 50 mm shall be provided
between a roof surface and cladding that is adversely affected
by moisture, such as untreated wood, plywood,
OSB, waferboard and hardboard.
1) The second plane of protection shall consist of a
drainage plane having an appropriate inner boundary and
flashing to dissipate rainwater to the exterior.
2) The inner boundary of the drainage plane shall
comply with Articles 9.27.3.2. to 9.27.3.6.
3) The protection provided by the second plane of
protection shall be maintained
a)at wall penetrations created by the installation of components and services such as windows, doors, ventilation ducts, piping, wiring and electrical outlets, and
b)at the interface with other wall assemblies.
4) Flashing material and its installation shall
comply with Articles 9.27.3.7. and 9.27.3.8.
1) Sheathing membranes shall conform to the performance
requirements of CAN/CGSB-51.32-M, “Sheathing, Membrane, Breather
Type.”
1) Except as provided in Articles 9.27.3.4. to 9.27.3.6., at least one layer of sheathing membrane shall be applied beneath cladding.
2) Sheathing membrane required in Sentence (1) shall be applied so that joints are lapped not less than 100 mm.
3) Where sheathing membrane required in Sentence (1) is applied horizontally, the upper sheets shall overlap the
lower sheets.
1) Where non-wood-based rigid exterior insulating
sheathing, or exterior insulating sheathing with an integral
sheathing membrane is installed, a separate sheathing membrane
is not required.
2) Where insulating sheathing is installed as provided in
Sentence (1),
a)sheathing panels subject to moisture deterioration shall be sealed at all joints, and
b)the joints of sheathing panels not subject to moisture deterioration shall be
i)sealed at all joints, or
ii)lapped or tongue and groove, and detailed to ensure drainage of water to the exterior.
(See Appendix A.)1) Except as provided in Article 9.27.3.6., where no sheathing is used, at least 2
layers of sheathing membrane shall be applied beneath the
cladding. (See Article 9.23.16.1. and Appendix A.)
2) All joints in the sheathing membrane required in
Sentence (1) shall occur over framing, and the membrane shall be
fastened to the framing with roofing nails or staples spaced not
more than 150 mm along the edges of the outer layer of sheathing
membrane.
3) Wall sheathing is permitted to be used in lieu of one
layer of sheathing membrane required in Sentence (1), and its thickness need not conform to Table 9.23.16.2.A.
1) Sheathing membrane is permitted to be omitted beneath
cladding when the joints in the cladding are formed to
effectively prevent the passage of wind and rain in conformance
with Sentences (2) or (3), as applicable.
2) Cladding consisting of sheets of plywood, hardboard,
OSB, waferboard or fibre cement is considered
to meet the requirements of Sentence (1), provided the cladding is applied so that
a)all edges are directly supported by framing,
b)the vertical joints between adjacent sheets are sealed and
i)covered with battens,
ii)shiplapped, or
iii)otherwise matched to provide weathertight joints, and
c) the horizontal joints between adjacent sheets are sealed and
i) shiplapped, or
ii) otherwise matched to provide weathertight joints.
3) Metal siding consisting of sheets of metal is
considered to meet the requirements of Sentence (1) where the joints between sheets are of the locked-seam type.
1) Flashing shall consist of not less than
a)1.73 mm thick sheet lead,
b)0.33 mm thick galvanized steel,
c)0.46 mm thick copper,
d)0.46 mm thick zinc,
e)0.48 mm thick aluminum, or
f)1.02 mm thick vinyl.
1) Except as provided in Sentence (2), flashing shall be installed at
a)every horizontal junction between cladding elements,
b)every horizontal offset in the cladding, and
c)every horizontal line where the cladding substrates change and where
i)the substrates differ sufficiently for stresses to be concentrated along that line, or
ii)the installation of the cladding on the lower substrate may compromise the drainage of moisture from behind the cladding above.
(See Appendix A.)2) Flashing need not be installed as described in
Sentence (1)
a)where the upper cladding elements overlap the lower cladding elements by not less than 25 mm,
b)where
i)the cladding above and below the joint is installed outboard of a drained and vented air space (see Clause 9.27.2.2.(1)(a)), and
ii)the horizontal detail is constructed so as to minimize the ingress of precipitation into the air space, or
c)at horizontal construction joints in stucco, where
i)the joint is finished with an expansion-contraction strip, and
ii)the cladding is installed outboard of a drained and vented air space (see Clause 9.27.2.2.(1)(a)).
3) Except as provided in Sentence (6), flashing shall be installed over exterior wall
openings where the vertical distance from the bottom of the eave
to the top of the trim is more than one-quarter of the
horizontal overhang of the eave. (See Appendix A.)
4) Flashing described in Sentences (1) and (3) shall
a)extend not less than 50 mm upward inboard of the sheathing membrane or sheathing installed in lieu of the sheathing membrane (see Article 9.27.3.4.),
b)have a slope of not less than 6% toward the exterior after the expected shrinkage of the building frame,
c)terminate at each end with an end-dam
i)with a height in millimetres not less than 25 mm or 1/10 the value of the 1-in-5 driving rain wind pressure in Pa, and
ii)at the height defined in Subclause (c)(i), extending to the face of the adjacent cladding,
d)lap not less than 10 mm vertically over the building element below, and
e)terminate in a drip offset not less than 5 mm outward from the outer face of the building element below.
(See Appendix A.)5) Except as provided in Sentence (6), where the sills of windows and doors installed
in exterior walls are not self-flashing, flashing shall be
installed between the underside of the window or door and
the wall construction below. (See Appendix A.)
6) Where a window or exterior door is provided with
an integral exterior flange and is designed to be installed
on the exterior of essentially flat lock-seam metal cladding
without a head or sill flashing, the flange shall be
a)bedded into a non-hardening sealant material, and
b)screwed down over the sealant through to the wall framing to form a waterproof joint.
(See Appendix A.)1) Caulking shall be provided where required to prevent
the entry of water into the structure.
2) Caulking shall be provided between masonry, siding or
stucco and the adjacent door and window frames or trim,
including sills, unless such locations are completely protected
from the entry of rain.
3) Caulking shall be provided at vertical joints between
different cladding materials unless the joint is suitably lapped
or flashed to prevent the entry of rain. (See Articles 9.7.4.2., 9.20.13.12. and 9.28.1.5.)
1) Caulking shall be
a)a non-hardening type suitable for exterior use,
b)selected for its ability to resist the effects of weathering, and
c)compatible with and adhere to the substrate to which it is applied.
2) Caulking shall conform to
a)CGSB 19-GP-5M, “Sealing Compound, One Component, Acrylic Base, Solvent Curing,”
b)CAN/CGSB-19.13-M, “Sealing Compound, One-Component, Elastomeric, Chemical Curing,”
c)CGSB 19-GP-14M, “Sealing Compound, One Component, Butyl-Polyisobutylene Polymer Base, Solvent Curing,” or
d)CAN/CGSB-19.24-M, “Multicomponent, Chemical-Curing Sealing Compound.”
1) Except as permitted by Sentences (2) to (7), cladding shall be fastened to the framing members or
furring members, or to blocking between the framing members.
2) Vertical lumber and stucco lath or reinforcing are
permitted to be attached to sheathing only where the sheathing
consists of not less than
a)14.3 mm lumber,
b)12.5 mm plywood, or
c)12.5 mm OSB or waferboard.
3) Vertically applied metal siding and wood shingles and
shakes are permitted to be attached to the sheathing only where
the sheathing consists of not less than
a)14.3 mm lumber,
b)7.5 mm plywood, or
c)7.5 mm OSB or waferboard.
4) Fibre-cement shingles are permitted to be
attached to the sheathing only when the sheathing
consists of not less than
a)14.3 mm lumber,
b)9.5 mm plywood, or
c)9.5 mm OSB or waferboard.
5) Where wood shingles or shakes are applied to sheathing
which is not suitable for attaching the shingles or shakes, the
shingles or shakes are permitted to be attached to a wood lath
not less than 38 mm by 9.5 mm thick securely nailed to the
framing and applied as described in Article 9.27.7.5.
6) Where fibre-cement shingles are applied to
sheathing that is not suitable for attaching the
shingles, the shingles are permitted to be fastened to a
wood lath not less than 89 mm by 9.5 mm thick securely
nailed to the framing.
7) Lath referred to in Sentence (6) shall be applied so that it overlaps the preceding shingle
course by not less than 20 mm.
1) Blocking for the attachment of cladding shall be not
less than 38 mm by 38 mm lumber securely nailed to the framing
and spaced not more than 600 mm o.c.
1) Except as permitted in Sentences 9.27.5.1.(5) and (6), furring for the attachment of cladding shall be not less than
19 mm by 38 mm lumber when applied over sheathing.
2) When applied without sheathing, furring referred to in
Sentence (1) shall be not less than
a)19 mm by 64 mm lumber on supports spaced not more than 400 mm o.c., or
b)19 mm by 89 mm lumber on supports spaced not more than 600 mm o.c.
3) Furring referred to in Sentence (1) shall be
a)securely fastened to the framing, and
b)spaced not more than 600 mm o.c.
1) Nail or staple size and spacing for the attachment of
cladding and trim shall conform to Table 9.27.5.4.
| Table 9.27.5.4. Attachment of Cladding Forming Part of Sentence 9.27.5.4.(1) |
|||
| Type of Cladding | Minimum Nail or Staple Length, mm | Minimum Number of Nails or Staples | Maximum Nail or Staple Spacing, mm (o.c.) |
|---|---|---|---|
| Wood trim | 51 | — | 600 |
| Lumber siding or horizontal siding made from sheet material | 51 | — | 600 |
| Metal cladding | 38 | — | 600 (nailed to framing) |
| 400 (nailed to sheathing only) | |||
| Wood shakes | |||
| up to 200 mm in width | 51 | 2 | — |
| over 200 mm in width | 51 | 3 | — |
| Wood shingles | |||
| 200 mm in width | 32 | 2 | — |
| over 200 mm in width | 32 | 3 | — |
| Asbestos-cement shingles | 32 | 2 | — |
| Panel or sheet type cladding | |||
| up to 7 mm thick | 38 | — | 150 (along edges) |
| more than 7 mm thick | 51 | — | 300 (along intermediate supports) |
1) Nails or staples for the attachment of cladding and
wood trim shall be corrosion-resistant and shall be compatible
with the cladding material.
1) Fasteners for metal or vinyl cladding shall be
positioned to permit expansion and contraction of the cladding.
1) Fasteners for shakes and shingles shall penetrate
through the nail-holding base or not less than 19 mm into the
framing.
2) Fasteners for cladding other than that described in
Sentence (1) shall penetrate through the nail-holding base or
not less than 25 mm into the framing.
1) Lumber siding shall be sound, free of knot holes,
loose knots, through checks or splits.
1) Drop, rustic, novelty, lapped board and vertical wood
siding shall be not less than 14.3 mm thick and not more than
286 mm wide.
2) Bevel siding shall be
a)not less than 5 mm thick at the top, and
b)not less than
i)12 mm thick at the butt for siding 184 mm or less in width, and
ii)14.3 mm thick at the butt for siding wider than 184 mm.
3) Bevel siding shall be not more than 286 mm wide.
1) Lumber siding shall prevent water from entering at the
joints by the use of lapped or matched joints or by vertical
wood battens.
2) Siding shall overlap not less than 1 mm per 16 mm
width of lumber, but not less than
a)9.5 mm for matched siding,
b)25 mm for lapped bevel siding, or
c)12 mm for vertical battens.
1) Shingles and shakes shall conform to
a)CSA O118.1, “Western Cedars Shakes and Shingles,” or
b)CSA O118.2-M, “Eastern White Cedar Shingles.”
2) Western cedar shakes shall be not less than No. 1 or
Handsplit grade, and western cedar shingles not less than No. 2
grade, except that No. 3 grade may be used for undercoursing.
3) Eastern white cedar shingles shall be at least B
(clear) grade, except that C grade may be used for the lower
course of double course applications.
1) Shingles and shakes shall be not less than 65 mm or
more than 350 mm wide.
1) Shingles or shakes shall be fastened with nails or
staples located approximately 20 mm from each edge and not less
than 25 mm above the exposure line for single-course
applications, or approximately 50 mm above the butt for
double-course applications.
1) In single-course application, joints in succeeding
courses shall be offset not less than 40 mm so that joints in
any 2 of 3 consecutive courses are staggered.
2) In double-course application, joints in the outer
course shall be offset from joints in the under-course by not
less than 40 mm, and joints in succeeding courses shall be
offset not less than 40 mm.
1) When lath is used with double-course application (see
Sentence 9.27.5.1.(5)), it shall be spaced according to the
exposure and securely fastened to the framing.
2) The butts of the under-course of the application
referred to in Sentence (1) shall rest on the top edge of the lath.
3) The outer course of the application referred to in
Sentence (1) shall be fastened to the lath with nails of
sufficient length to penetrate through the lath.
4) The butts of the shingles or shakes shall be so
located that they project not less than 12 mm below the bottom
edge of the lath referred to in Sentence (1).
5) If wood lath is not used, the butts of the
under-course shingles or shakes of the application referred to
in Sentence (1) shall be located 12 mm above the butts of the outer
course.
1) The exposure and butt thickness of shingles and shakes
shall conform to Table 9.27.7.6.
| Table 9.27.7.6. Exposure and Thickness of Wood Shingles and Shakes Forming Part of Sentence 9.27.7.6.(1) |
|||
| Shake or Shingle Length, mm | Maximum Exposure, mm | Minimum Butt Thickness, mm | |
|---|---|---|---|
| Single Coursing | Double Coursing | ||
| 400 | 190 | 305 | 10 |
| 450 | 216 | 356 | 11 |
| 600 | 292 | 406 | 13 |
1) Asbestos-cement shingles and sheets shall conform to
a)CAN/CGSB-34.4-M, “Siding, Asbestos-Cement, Shingles and Clapboards,”
b)CAN/CGSB-34.5-M, “Sheets, Asbestos-Cement, Corrugated,”
c)CAN/CGSB-34.14-M, “Sheets, Asbestos-Cement, Decorative,”
d)CAN/CGSB-34.16-M, “Sheets, Asbestos-Cement, Flat, Fully Compressed,”
e)CAN/CGSB-34.17-M, “Sheets, Asbestos-Cement, Flat, Semicompressed,” or
f)CAN/CGSB-34.21-M, “Panels, Sandwich, Asbestos-Cement with Insulating Cores.”
1) Asbestos-cement shingles shall weigh not less than
8.06 kg/m2.
2) Asbestos-cement sheet shall be not less than
a)4.75 mm thick where applied to studs spaced not more than 400 mm o.c., and
b)6 mm thick where applied to studs spaced not more than 600 mm o.c.
3) Where applied over sheathing, the thickness of
asbestos-cement sheet shall be not less than 3.15 mm.
1) Asbestos-cement shingles shall be fastened with nails
located not less than 25 mm above the exposure line.
1) Asbestos-cement shingles shall be installed so that
vertical joints in succeeding courses are staggered.
2) Asphalt-coated backer strips shall be installed behind
each vertical joint.
3) Shingles referred to in Sentence (1) shall have not less than a 25 mm head lap.
1) Vertical joints of asbestos-cement panels shall be
protected with batten strips, caulking or other suitable method.
2) Horizontal joints of asbestos-cement panels shall be
lapped, flashed, caulked or otherwise suitably protected.
1) Plywood cladding shall be exterior type conforming to
a)CSA O115-M, “Hardwood and Decorative Plywood,”
b)CSA O121-M, “Douglas Fir Plywood,”
c)CSA O151, “Canadian Softwood Plywood,” or
d)CSA O153-M, “Poplar Plywood.”
1) Plywood cladding shall be not less than 6 mm thick
when applied directly to sheathing.
2) When applied directly to framing or over furring
strips, plywood cladding thickness shall conform to Table 9.27.9.2.
| Table 9.27.9.2. Minimum Plywood Cladding Thickness Forming Part of Sentence 9.27.9.2.(2) |
||
| Spacing of Supports, mm | Minimum Thickness, mm | |
|---|---|---|
| Face Grain Parallel to Supports | Face Grain Right Angles to Supports | |
| 400 | 8 | 6 |
| 600 | 11 | 8 |
3) The thickness of grooved or textured plywood cladding
shall be measured at the point of least thickness.
1) The edges of plywood cladding shall be treated with a
suitable paint or sealer.
1) Plywood applied in panels shall have all edges
supported.
2) Not less than a 2 mm gap shall be provided between
panels referred to in Sentence (1).
3) Vertical joints in cladding referred to in Sentence (1) shall be protected with batten strips or caulking when the
plywood joints are not matched.
4) Horizontal joints in cladding referred to in Sentence (1) shall be lapped not less than 25 mm or shall be suitably
flashed.
1) Plywood applied in horizontal lapped strips shall have
not less than a 2 mm gap provided at the butted ends, which
shall be caulked.
2) The horizontal joints of siding described in Sentence (1) shall be lapped not less than 25 mm.
3) Wedges shall be inserted under all vertical butt
joints and at all corners when horizontal lapped plywood is
applied without sheathing.
1) Factory-finished hardboard cladding shall conform to
CAN/CGSB-11.5-M, “Hardboard, Precoated, Factory Finished, for Exterior
Cladding.”
2) Hardboard cladding that is not factory finished shall
conform to Types 1, 2 or 5 in CAN/CGSB-11.3-M,
“Hardboard.”
1) Type 1 or 2 hardboard cladding shall be not less than
a)6 mm thick when applied over sheathing that provides continuous support, and
b)7.5 mm thick when applied over furring or framing members not more than 400 mm o.c.
2) Type 5 hardboard cladding shall be not less than 9 mm
thick when applied over sheathing that provides continuous
support or over furring or framing members spaced not more than
400 mm o.c.
3) Where hardboard cladding is grooved, the grooves shall
not extend more than 1.5 mm into the minimum required thickness.
(See Appendix A.)
1) Hardboard cladding applied in panels shall have all
edges supported with not less than a 5 mm gap provided between
sheets.
2) Vertical joints in cladding described in Sentence (1) shall be protected with batten strips or caulking when the
joints are not matched.
3) Horizontal joints in cladding described in Sentence (1) shall be lapped not less than 25 mm or shall be suitably
flashed.
1) Hardboard applied in horizontal lapped strips shall
have not less than a 5 mm gap provided at the butted ends, which
shall be caulked or otherwise protected with suitable mouldings.
2) The horizontal joints of siding described in Sentence (1) shall overlap not less than 1 mm per 16 mm width of siding board
but not less than 9.5 mm for matched joint siding or 25 mm for
lapped siding.
1) Not less than 3 mm clearance shall be provided between
hardboard cladding and door or window frames.
1) OSB and waferboard cladding shall conform to CSA O437.0, “OSB and
Waferboard.”
1) OSB conforming to O-2 grade shall be not less than 6.0
mm thick where applied directly to sheathing.
2) OSB conforming to O-2 grade applied directly to
framing or over furring strips shall conform to the thickness
shown for plywood in Table 9.27.9.2. (See Appendix A.)
3) OSB conforming to O-1 grade and waferboard conforming
to R-1 grade shall be not less than 7.9 mm thick where applied
directly to sheathing.
4) Where applied directly to framing or over furring
strips, OSB conforming to O-1 grade and waferboard conforming to
R-1 grade shall be not less than
a)9.5 mm thick on supports spaced not more than 400 mm o.c., and
b)12.7 mm thick on supports spaced not more than 600 mm o.c.
1) OSB and waferboard applied in panels shall have all
edges supported and treated with a primer or sealer.
2) Not less than a 3 mm gap shall be provided between
sheets in cladding described in Sentence (1).
3) Vertical joints in cladding described in Sentence (1) shall be protected with batten strips or caulking when the OSB
and waferboard joints are not matched.
4) Horizontal joints in cladding described in Sentence (1) shall be lapped not less than 25 mm or shall be suitably
flashed.
1) Not less than a 3 mm clearance shall be provided
between OSB and waferboard cladding and door or window frames.
1) Horizontal and vertical strip steel siding, including
flashing and trim accessories, shall conform to CAN/CGSB-93.4,
“Galvanized Steel and Aluminum-Zinc Alloy Coated Steel Siding,
Soffits and Fascia, Prefinished, Residential.”
2) Steel sheet cladding shall have a minimum thickness of
0.3 mm and conform to CAN/CGSB-93.3-M, “Prefinished
Galvanized and Aluminum-Zinc Alloy Steel Sheet for
Residential Use.”
3) Horizontal and vertical strip aluminum siding,
including flashing and trim accessories, shall conform to
CAN/CGSB-93.2-M, “Prefinished Aluminum Siding,
Soffits and Fascia, for Residential Use.” (See
Appendix A.)
4) Aluminum sheet cladding shall conform to CAN/CGSB-93.1-M, “Sheet,
Aluminum Alloy, Prefinished, Residential,” and shall
have a thickness of not less than 0.58 mm, except that siding
supported by backing or sheathing shall have a thickness of not
less than 0.46 mm. (See Appendix A.)
1) Vinyl siding, including flashing and trim accessories,
shall conform to CAN/CGSB-41.24, “Rigid Vinyl Siding, Soffits and
Fascia.”
1) The attachment of vinyl siding shall conform to the
requirements in Subsection 9.27.5. for metal siding.