Garland SBS Waterproofing Installation Guidelines

Notice to the Reader: The instructions provided below are reprinted from the manufacturer's own materials which were submitted to the RoofStar Guarantee Program for inclusion in this Manual. The reader is urged to check these against current publications issued by the manufacturer, to ensure accuracy.

Manufacturer: GARLAND CANADA INC.

Contact Address: See Membership List in Section 1.

Product Group: SBS MODIFIED BITUMINOUS WATERPROOFING MEMBRANES

Country of Origin: Canada

Country of Manufacture: Canada, USA, United Kingdom

Year First Installed

B.C.: 1990

Canada: 1987

Foreign: 1974

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1 Description

Garland Canada Inc. is a leading manufacturer and distributor of high-performance roofing and waterproofing solutions for commercial, industrial, and public properties. We offer our industry's most comprehensive customer support services, including a unique Roof Asset Management Program (RAMP®). Our innovative products and facility management solutions have been extending the life cycle of buildings like yours for over a century.

1.1 GENERAL

The roofing assembly / material information published by the RCABC Roofing Practices Manual does NOT represent a complete set of the manufacturer's published data, nor does it represent a detailed specification. The preparation of a detailed specification is the responsibility of the design authority.

SYSTEM DESCRIPTION

.1 Two-ply roof membranes: the first ply consists of a base sheet; applied with hot , SBS or SEBS asphalt, fully heat welded; the second ply consists of a cap sheet applied with hot SBS asphalt or SEBS, or heat welding.

PROJECT CONDITIONS

.1 Do not apply roofing insulation or membrane to damp deck surface.

.2 Do not expose materials subject to water or solar damage in quantities greater than can be weatherproofed during same day.

MANUFACTURER'S SERVICES

.1 Applicator training: Garland membranes are applied by GARLAND APPROVED APPLICATORS ONLY.

.2 Technical service: technical representatives are available for consultation and field training; owners, architects, and engineers are assisted in the selection and proper use of Garland materials by technical representatives.

.3 Specification / Drawings: complete specifications and detail drawings are available upon request.

1.2 MATERIALS

NOTE: Regardless of the materials listed below or anywhere else in these manufacturer's guidelines, only materials accepted for use in the RoofStar Guarantee Program, or accessories associated with those materials, may be used to qualify for a RoofStar Guarantee. To see a list of the manufacturer's products accepted for use in the RoofStar Guarantee Program, click on the link above.

MEMBRANES

Consult the list of Accepted Materials by clicking on the MATERIALS link above.

RELATED MATERIALS

Flashing Bond®	Cold-applied, fibered mastic used withreinforcing fabric
Garla-Flex®	High quality flexible elastomeric asphaltic mastic
Garla-Prime®	Quick-dry asphalt cut back primer
GARLAND ALL TEMP SBS ASPHALT	Hot applied, SEBS polymer modified asphalt adhesive & waterproofer	2 or 3 ply system
GARLASTIC KMKM PLUS	Hot applied, SEBS polymer modified asphalt adhesive & waterproofer	2 or 3 ply system

ANCILLARY PRODUCTS

.1 Asphalt: Roofing asphalt conforming to ASTM D312-78 Type 4, CSA A 123.4 M < 1979 Type # on slopes less then 1:24 (1/2" in 12') (4%).

1.3 EXECUTION

PREPARATION

.1 Ensure membrane substrate is rigid, dry, smooth, compatible, free of fins and sharp edges, and clean of all

.2 Ensure all openings, walls, and projections through the roof are firmly affixed and cant strips, reglets and nailing strips are in place.

PRIMER

.1 Prime the concrete deck or the dense deck, and metal surfaces to be directly adhered with bituminous membranes; allow to dry.

APPLICATION INSTRUCTION FOR A TWO PLY WATERPROOFING SYSTEM

.1 BASE SHEET INSTALLATION (TWO PLY SYSTEM) HOT

A. Base sheet: Install one (1) SBS base sheet in twenty five (25) lbs (11.3kg) per square of bitumen of shingled uniformly over the entire prepared substrate. Shingle in direction of slope of roof to shed water on each area. Do not step on rolls until modified asphalt has cooled, fish mouths should be cut and patched.

B. Lap ply sheet ends eight (8) inches (203mm).

C. Lightly broom in base plies to assure complete adhesion.

D. Extend plies two (2) inches (50mm) beyond top edges of cants at wall and roof projections and equipment bases.

E. Install base flashing ply to all perimeter details after waterproofing membrane application.

.2 MODIFIED MEMBRANE INSTALLATION HOT

A. Solidly bond the modified membrane to the base layers with specified modified asphalt at the rate of twenty five (25) to thirty (30) lbs. (11-13kg) per 100 square feet.

B. The modified membrane roll must push a puddle of the modified asphalt in front of it with asphalt slightly visible at all side laps. Exercise care during application to eliminate air entrapment under the waterproofing membrane.

C. Apply pressure to all seams to ensure that the laps are solidly bonded to substrate.

D. Install subsequent rolls of modified membrane across the roof as above with a minimum of four (4) inch (101mm) side laps and eight (8) inch (203mm) end laps. Stagger the end laps. Apply the modified membrane in the same direction as the previous layers but stagger the laps so they do not coincide with the laps of the base layers.

E. Apply the hot modified asphalt no more than five (5) feet (1.5m) ahead of each roll being embedded.

.3 FLASHING MEMBRANE INSTALLATION

A. Seal all curb, wall and parapet flashings with an application of mastic and mesh on a daily basis. Do not permit conditions to exist that will allow moisture to enter behind, around or under the roof or flashing membrane.

B. Prepare all walls, penetrations, expansion joints [and where shown on the drawings] to be flashed with asphalt primer at the rate of one hundred (100) square feet per gallon (2.1square m per litre). Allow primer to dry tack free.

C. Use the modified membrane as the flashing membrane. Adhere to the underlying base flashing ply with specified the modified asphalt unless otherwise noted in these specifications. Nail off at a minimum of eight (8) inches (203mm) o.c. from the finished roof at all vertical surfaces.

D. Solidly adhere the entire sheet of flashing membrane to the substrate.

E. Seal all vertical laps of flashing membrane with a three-course application of trowel-grade mastic and fiberglass mesh.

F. Coordinate counter flashing, cap flashings, expansion joints, and similar work with modified bitumen roofing work.

APPLICATION INSTRUCTION FOR A TWO PLY WATERPROOFING SYSTEM - HOT WELDED

.1 BASE SHEET INSTALLATION

A. Install one layer of SBS Torch Base Sheet to a properly prepared substrate. Shingle in proper direction to shed water on each area of roofing.

OR

B. To a suitable substrate, lay out the roll in the course to be followed and unroll six (6) feet (1.8m).

C. Using a roofing torch, heat the surface of the coiled portion until the burn-off backer melts away. At this point, the material is hot enough to lay into the substrate. Progressively unroll the sheet while heating and press down with your foot to insure a proper bond.

D. After the major portion of the roll is bonded, re-roll the first six (6) feet (1.8m) and bond it in a similar fashion.

E. Repeat this operation with subsequent rolls with side laps of four (4) inches (101mm) and end laps of eight inches.

F. Give each lap a finishing touch by passing the torch along the joint and spreading the melted bitumen evenly with a rounded trowel to insure a smooth, tight seal.

G. Extend underlayment two (2) inches (50mm) beyond top edges of cants at wall and projection bases.

H. Install base flashing ply to all perimeter and projections details.

.2 MODIFIED MEMBRANE APPLICATION

A. Install HPR torch-on membrane as described below.

B. Over the SBS Torch Base Sheet underlayment(s), lay out the roll in the course to be followed and unroll six (6) feet (1.8m). Seams for the top layer of modified membrane will be staggered over the SBS Torch Base Sheet seams.

C. Using a roofing torch, heat the surface of the coiled portion until the burn-off backer melts away. At this point, the material is hot enough to lay into the substrate. Progressively unroll the sheet while heating and press down with your foot to insure a proper bond.

D. After the major portion of the roll is bonded, re-roll the first six (6) feet (1.8m) and bond it in a similar fashion.

E. Repeat this operation with subsequent rolls with side laps of four (4) inches (101mm) and end laps of eight (8) inches (203mm).

F. Give each lap a finishing touch by passing the torch along the joint and spreading the melted bitumen evenly with a rounded trowel to insure a smooth, tight seal.

.3 FLASHING MEMBRANE INSTALLATION

A. Seal all curb, wall and parapet flashings with an application of mastic and mesh on a daily basis. Do not permit conditions to exist that will allow moisture to enter behind, around or under the roof or flashing membrane.

B. Prepare all walls, penetrations, expansion joints [, and where shown on the drawings] to be flashed with asphalt primer at the rate of one hundred (100) square feet per gallon (2.1 square m per litre). Allow primer to dry tack free.

C. Use the modified membrane as the flashing membrane. Adhere to the underlying base flashing ply with specified modified asphalt unless otherwise noted in these specifications. Nail off at a minimum of eight (8) inches (203mm) o.c. from the finished roof at all vertical surfaces.

D. Solidly adhere the entire sheet of flashing membrane to the substrate. Tops of all flashings that are not run up and over curb shall be secured through termination bar 6 inches (152mm) and sealed at top

E. Seal all vertical laps of flashing membrane with a three-course application of trowel-grade mastic and fiberglass mesh. Specifier Note: Include only the following paragraphs which coordinate with details existing on the roof that you are specifying. Please delete the paragraphs that do not apply to your roof. The detail number correlates to a detail drawing that should accompany this specification. Delete the drawing number in brackets in the final edit of the specification. Contact your local Garland Representative with any questions regarding unusual or custom details.

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