BUR-5.1 General
.1
Primary insulation is the system component that
provides the major portion of the thermal performance of the
roofing system. The location of the primary insulation can vary
depending on the roofing system design type.
.2
For ARCA Warranty Ltd. acceptance,
insulation products must be tested by a certified testing agency,
approved by the Standards Council of Canada, such as the
Underwriters’ Laboratories of Canada (ULC) or a Canadian
Construction Materials Centre (CCMC) evaluation listing to verify
compliance to an existing insulation standard. Third party
certified thermal insulation products are accepted by specific
manufacturer and product name, and are not accepted generically for
inclusion under the Warranty Certificate Program.
Revised
2012-03
.3
To eliminate confusion during the tendering
process, it is recommended that the design authority specify roof
insulation by the type and thickness of insulation to be used.
Specifying insulation by thermal resistance values may lead to
confusion during the construction process as insulation thickness
affects the design heights of other building components, such as
perimeters, curbs and sleepers.
.4
Roof insulation shall be protected during
shipping and site storage to prevent moisture infiltration and
damage. No insulation material, either primary or secondary, is to
be installed when its moisture content exceeds the manufacturer’s
stated equilibrium moisture content. Surface moisture should be
allowed to dry. Wet or damp insulation that cannot be dried must be
removed and replaced with dry insulation.
.5
When specifying plastic foam insulation, the
design authority must ensure compliance with Alberta Building
Standards relative to the use of thermal barriers, as this falls
outside the expertise of the roofing contractor.
.6
Only new insulation shall be installed in
new conventional insulated roofing assemblies.
Added
2017-11
BUR-5.2 Insulation Blocking for Sloped Decks
.1
To prevent primary membrane movement or
displacement, continuous wood nailers or blocking shall be
mechanically fastened to the decking when deck slopes exceed 1:8
(1.5”/ ft.) when using organic felt or 1:12 (1”/ ft.) when using
inorganic felt. The design of the insulation blocking system is the
responsibility of the design authority and is not covered by the
Warranty Certificate.
.2
When insulation blocking is required, all
roofing system components shall be uniformly adhered to each other
and to their supporting substrate. Multiple layers of primary
insulation require multiple layers of insulation blocking. The
upper nailers shall be oriented perpendicular to the direction of
the primary membrane.
.3
The size and spacing of the blocking
shall match the primary insulation board dimensions and shall
provide for the back nailing of the primary membrane. The maximum
spacing permitted between the blocking is 1200mm (4 ft.). The top
surface of the primary insulation shall be flush with the top of
the blocking.
Revised
2010-06
.4
The secondary insulation shall be adhered to the
primary insulation and shall be mechanically fastened to the
blocking.
BUR-5.3 Primary Insulation
.1
The primary insulation shall be uniformly
adhered to the vapour retarder in a full application of hot
bitumen, with an approved adhesive or mechanically fastened through
the vapour retarder to the structural deck.
.2
Primary insulation boards shall be tightly
butted together. Gaps at board joints greater than 6.4mm (1/4”) in
width shall be filled with insulation. Primary insulation joints
may be aligned.
.3
When multi-layers of primary insulation are
specified offset board joints by a minimum distance of 150mm (6”)
from the preceding insulation layer.
.4
When insulation is adhered with adhesive or hot
bitumen, restrict board size to no greater than 1200mm x 1200mm (4
ft. x 4 ft.) dimensions for proper adhesion.
BUR-5.4 Secondary Insulation
.1
The primary insulation shall be covered
with a minimum 12.7mm (1/2”) thick layer of coated fiberboard or
perlite roof insulation. The secondary insulation provides a
preferred substrate for the adhesion of the primary membrane as
well as provides some additional thermal resistance.
Revised
2012-03
.2
Secondary insulation shall be uniformly adhered
to the primary insulation in a full mopping of hot bitumen, an
adhesive approved by the primary membrane manufacturer or
mechanically fastened to the structural deck.
.3
Secondary insulation joints shall be staggered
and offset a minimum distance of 150mm (6”) from the joints of the
underlying primary insulation.
.4
For proper adhesion when using hot bitumen, the
secondary insulation boards shall not exceed 1200mmx2400mm (4 ft. x
8 ft.) in size.
.5
Secondary insulation boards exceeding
1200mmx2400mm (4 ft. x 8 ft.) in size shall be mechanically
fastened to the decking.
.6
For hot applied membranes, the top
surface of standard fiberboard or stone wool secondary insulation
shall be manufactured with an asphalt coating. Wax or asphalt
impregnated fiberboard need not be asphalt coated.
Revised
2012-03
.7
When polystyrene insulation forms the primary
insulation layer, the secondary insulation shall be comprised of a
single layer of 25mm (1”) thick shiplap edged or two (2) 12.7mm
(1/2”) thick layers of butt edged impregnated/coated fiberboard or
perlite roof insulation. Each secondary insulation layer shall be
adhered with hot bitumen using the "mop and flop" back coating
application method.
BUR-5.5 Asphalt Core Boards
.1
Asphalt core board may be substituted for
the secondary insulation layer over selected primary roof
insulation when its application is approved by the primary membrane
manufacturer.
Added
2013-10
.2
Polystyrene insulation forms the primary
insulation layer, the asphalt core board shall be comprised of two
(2) 3.2mm (1/8”) thick layers of butt edged asphalt core boards.
Each cover board layer shall be adhered with hot bitumen using the
“mop and flop” back coating application method. Offset board joints
of the board a minimum of 150mm (6”) from the underlying
layer.
.3
One layer of minimum 3.2mm (1/8”) thick asphalt
core board is acceptable over faced insulations that are not heat
sensitive for direct mopping application.
BUR-5.6 Accepted Roofing Insulation
BUR-5.6.1 Primary Insulation
.1
Each listed insulation manufacturer has
confirmed third party product certification by an accredited
independent testing agency, in accordance with ARCA Warranty Ltd.
insulation acceptance criteria.
.2
The design authority shall obtain long term
thermal resistance (LTTR) values from the insulation manufacturer
and shall specify primary insulation by thickness.
-
Polyisocyanurate Roof Insulation
-
Atlas Roofing Corporation
- AC Foam-11
-
Firestone Building Products Canada
- ISO 95+
-
IKO Industries Ltd.
- IKOTHERM
-
Hunter Panels LLC (Carlisle)
- H-SHIELD Polyisocyanurate added June 2015
- Carlisle Polyisocyanurate added March 2012
-
Sika Sarnafil Canada Inc.
- Sarnatherm
Added
2014-11
-
Soprema Inc
- Sopra-ISO (e) added January 2016
- Sopra-ISO (s) added January 2016
- Sopra-ISO (r) added January 2016
- Sopra-ISO added October 2016
- Sopra-ISO Plus added October 2016
-
-
Expanded Polystyrene Roof Insulation
-
Beaver Plastics Ltd.
- Terrafoam Type 1
- Terrafoam Type 2
-
Plasti-Fab Ltd.
- Plasti-Span Type 1
- Plasti-Span Type 2
- Plasti-Span Type 3
-
EPS Molders
- Type 1
- Type 2
Added
2015-04
-
-
Extruded Polystyrene Insulation
-
Owens Corning Canada
- Foamular C-300 & 350
Revised
2010-12
-
Dow Canada
- DeckMate Type 2
- DeckMate 200 Type 3
- RoofMate Type 4
- Deckmate PLUS FA added 2016-01
-
Soprema
- Sopra XPS 35
- Sopra XPS 40
- Sopra XPS 60
Added
2018-10
-
-
Mineral Fiber Roof Insulation
-
Soprema
- Soprarock DD (Plus)
-
-
Fiberboard Roof Insulation
-
MSL Louiseville Fibreboard Inc.
- Wood Fibreboard Insulation
Revised
2015-07
-
International Bildrite Inc.
- RoofRite Coated Fiberboard
Added
2011-04
-
BUR-5.6.2 Secondary Insulation
.1
Acceptances of secondary insulation products by
ARCA Warranty Ltd. is on an individual product basis. The
insulation acceptance criteria provide for specific manufacturing
or application parameters pertaining to each listed product.
-
MSL Louiseville Fibreboard
- Wood Fibreboard Insulation
Revised
2015-07
-
International Bildrite Inc.
- RoofRite Coated Fiberboard
Added
2011-04
BUR-5.6.3 Asphalt Core Boards
-
IKO Industries Ltd.
- min 3.0mm thick PROTECTOBOARD
-
Soprema Inc.
- min 3.2mm thick SOPRABOARD
-
Hal Industries Inc.
- min 4.5mm thick PERMA-BOARD
Added
2013-10
BUR-5.7 Polyurethane Foam Adhesive for Insulation and Asphalt Core Board
BUR-5.7.1 General
.1
A primary membrane manufacturer’s accepted
low-rise two component, chemical cure, polyurethane foam adhesive,
when used in compliance with the manufacturer’s written application
instructions, may be used to uniformly adhere accepted insulation
and asphalt core boards to one another, to accepted vapour
retarders, insulation and substrates.
.2
The primary membrane manufacturer's insulation
adhesive(s) have been evaluated by ARCA Warranty Ltd. for specific
applications and are not accepted as general purpose roofing
adhesives and are not to be substituted for other accepted primary
membrane manufacturers insulation adhesives.
.3
Prior to dispensing foam, store adhesive at
recommended application temperature and ensure adhesive shelf life
date has not been exceeded.
.4
Foam insulation adhesives may be dispensed to
clean moisture free substrates by wand or spray equipment applied
in accordance with adhesive manufacturer’s application rates. For
wand applications, maintain proper adhesive ribbon size and spacing
for roof field, perimeter and corners. When spraying, maintain
minimum coverage rates.
.5
Protect newly applied foam adhesive from
contamination prior to bonding roofing components. Follow adhesive
manufacturer’s post application requirements for weighting, rolling
or walk-in insulation boards into the uncured adhesive to prevent
air gaps from forming between insulation boards and their
supporting substrate.
.6
When polyisocyanurate roof insulation
forms the primary insulation layer, insulation boards shall not
exceed 1200mmx1200mm (4 ft. x 4 ft.) in size.
Added
2015-01
BUR-5.7.2 Accepted Roof Insulation Adhesives
.1
The adhesives listed below by membrane
manufacturer have been evaluated and accepted for specific
applications. Accepted adhesives are not general purpose roofing
adhesives and are not interchangeable amongst membrane
manufacturers.
-
Polyurethane Foam Insulation Adhesive
Two component low-rise, chemically cured urethane foam adhesive for the attachment of selected rigid roof insulation and cover boards to one another and to fully adhered vapour barriers.
-
Carlisle (Approved Carlisle Systems Only)
- FAST ADHESIVE Dual Cartidge
Revised
2016-04
-
Firestone (Approved Firestone Systems Only)
- I.S.O. TWIN PACK Insulation Adhesive
Revised
2016-04
-
IKO Industries Ltd. (Accepted IKO Systems Only)
- Roofcraft Roofmix Two Part Insulation Adhesive
- Millennium Adhesive Products, Weather-Tite One Step Foamable Adhesive
Added
2010-06
-
Soprema Inc. (Approved Soprema Systems Only)
- DUOTACK Roof Insulation and Coverboard Adhesive
- DUOTACK 365 Roof Insulation and Coverboard Adhesive added October 2016
Revised
2016-04
-
-
Other Insulation Adhesives
When approved for application by the membrane manufacturer and accepted by ARCA Warranty Ltd. on a project by project basis.
-
Dow Canada (As Approved by Dow Technical Services)
- Insta-Stik Professional Roofing Adhesive (one component polyurethane foam)
Added
2010-06
-
Siplast Canada Inc. (Approved Siplast Systems Only)
- PARASTIK Adhesive
Revised
2016-04
-