Tremco Hybrid EPDM 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: TREMCO CANADA

Contact Address: See Membership List in Section 1

Product Group: REINFORCED SINGLE-PLY MEMBRANE: Hybrid Bituminious EPDM Systems

Country of Origin: Canada

Year First Installed

1980

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1 TRA with THERMastic 100

1.1 Description

The TREMLINE ROOF ASSEMBLY (TRA) utilizes TRA elastomeric sheet and THERMastic 100, a proprietary hot applied elastomeric modified bitumen adhesive for fully adhering the TRA Sheet. TRA sheet is formulated from a select composition of polymers, reinforced with scrim.

1.1.1 GENERAL

The roofing assembly / material information published in 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. TRA Fully-Adhered: Install TRA sheeting into a 2.5 to 3.4 L / m² (5 to 7 gal / square) coat of THERMastic (B); overlay and adhere laps of adjacent TRA sheets with THERMastic (B); apply reflective coating to entire membrane; surface with polyethylene prior to installing polystyrene insulation, scrim and ballast.
2. TRA Partially-Adhered: Install TRA sheeting; overlap and adhere laps of adjacent TRA sheets with THERMastic (B) at the rate of 2.5 to 3.4 L / m² (5 to 7 gal / square) ensuring THERMastic (B) extends beyond lap onto a substrate 178 mm to 203 mm (7" to 8") to provide partial bond; over pour laps with THERMastic (B); install ballast; surface with polyethylene prior to installing polystyrene insulation, scrim and ballast.

DELIVERY, STORAGE AND HANDLING

1. Deliver and store materials in original packages with manufacturers' seals and labels intact.
2. Keep roofing materials dry; protect frpm.rcabc.org conditions.

SITE CONDITIONS

1. Slope Limitations:
   • Minimum recommended slope 1:50 (1/4" in 12")
   • Backnail each sheet on slopes over 1:6 (2" in 12")

MANUFACTURER'S SERVICES

1. Applicator Training: available.
2. Technical Service: representatives are available for design consultation and assistance.
3. Specification / Drawings: provided on all applications.

1.1.2 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.

TRA MEMBRANE

1. Tremco TRA Elastomeric single-ply membrane – typical physical property information available from the manufacturer, Tremco Ltd.
2. THERMastic 100 meets requirements of ASTM D6152. Other physical properties available from the manufacturer, Tremco Canada.

ANCILLARY PRODUCTS

1. Cutback Primer: Tremprime Q.D. or Tremprime LV
2. Reinforcing Membrane: BURmesh woven glass

1.1.3 EXECUTION

PREPARATION

1. Ensure surfaces receiving membrane are smooth, clean and dry.
2. Ensure wood blocking, curbs and cant strips are solidly secured and reglets and nailing strips are in place as required.
3. Prepare substrate and apply roofing membrane in accordance with good roofing practices as outlined by RGC for the specific desk type.

APPLICATION

THERMastic 100 Preparation:

Preparation of THERMastic 100:hot applied elastomeric modified bitumen . THERMastic 100 is to be heated in a conventional roofing kettle, equipped with accurate thermometers and a circulating pump. During heating, material temperature is not to exceed +260°C (+500°F), and must be applied at not less than +218°C (+425°F).

TRA Sheet Application

1. Placement
   • Plan the placement of TRA sheets to facilitate the fabrication of the least number of seams; starting at the low point, position the uppermost to overlap the adjacent sheet by 102 mm (4") + 3 mm (1/8").
2. Fully-Adhered: Apply THERMastic 100 at the rate of 1.2 kg / m² (25 lb / square) to substrate and along the inside edge of the adjacent TRA sheet ensuring the THERMastic 100 extends onto the adjacent sheet 102 mm to 127 mm (4" to 5"): immediately roll out the top sheet into the hot THERMastic 100; roll or broom the sheet to ensure that it is properly embedded, without wrinkles, blisters or fishmouths.
   • Apply THERMastic 100 over the lap at the rate of 1.2 kg / m² (25 lb / square) such that the THERMastic extends 51 mm to 76 mm (2" to 3") on either side of the leading edge.

Flashings

1. Ensure continuity of air / vapour seal at all changes in direction.
2. Install one ply of TRA sheeting into THERMastic 100; overcoat all lap edges with THERMastic 100.
3. Ensure that flashing membrane extends onto roof membrane a minimum of 150 mm (6") and terminates a minimum of 200 mm (8") above roof membrane on walls.
4. Mechanically fasten flashing membrane 200 mm to 300 mm (8" to 12") on centre along outside fascia and along upper edge of wall flashing.

SURFACING

1. Install 300 mm (12") strips of polyethylene on the cured overpours of the installed TRA. Place the specified thickness of extruded polystyrene insulation, woven polyolefin scrim fabric and ballast at the rate of 49 kg / sqm (1000 lb / square).

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1.2 Membrane Assemblies

1.2.1 Protected Membrane Roof Assemblies

ROOF ASSEMBLY
Components	Options	Comments or Cautions
Roof Deck	Plywood / Wood	Prime surfaces to be adhered with hot bituminous material. Tape plywood joints if mopped with hot adhesive. Wood decks require a nailed separation sheet. Steel decks require a levelling underlay.
	Concrete
	Steel
Underlay	Gypsum	Minimum 12.7 mm (1/2") thickness required, mechanically fasten to steel deck under PMR assemblies.
	Plywood
Thermal Barrier	Gypsum	Minimum 12.7 mm (1/2") may be required between steel deck and roof system using combustible insulations. (See Building Code).
MEMBRANE
Base Sheet	BURmastic (cold process felt)	Mechanically fasten to wood decks.
Roof Membrane	TRA sheet	Install TRA sheet into THERMastic 100 applied at the rate of 1.2 kg/m2 (25 lb / square).
	THERMastic 100
Flashings	TRA sheet	Install TRA sheet into THERMastic 100.
	THERMastic 100	Adhere and over pour all laps and leading edges with THERMastic 100.
Separation Sheet	4 mil polyethylene	Place polyethylene separation sheet between THERMastic 100 and polystyrene insulation.
Insulation	Extruded polystyrene	Loose lay over roof membrane.
Filter Fabric	100% Polyolefin	Loose lay over insulation.
Ballast	19 mm to 38 mm (3/4" to 1 1/2") round, graded gravel	Deck must be capable of withstanding required loading. Install according to manufacturer's recommendations for specified insulation thickness.
	Pavers

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2 TRA - LRM

Manufacturer: TREMCO CANADA

Contact Address: See Membership List in Section 1

Product Group: REINFORCED SINGLE-PLY MEMBRANE: TRA - LRM

FULLY-ADHERED (PROTECTED MEMBRANE ASSEMBLY)

Country of Origin: Canada

Year First Installed

1999

2.1 Description

TRA-LRM utilizes TRA elastomeric sheet and Tremlar LRM (aka TP60), a cold applied, bitumen modified, moisture curing polyurethane elastomer used to adhere and seam the TRA sheet.

2.1.1 GENERAL

SYSTEM DESCRIPTION

1. Install TRA sheeting into a notched squeegee coat of Tremlar LRM applied at the rate of 1.2 sqm / litre (2 gal / sq): overlay and adhere laps of adjacent TRA sheets with Tremlar LRM; topdress all laps with Tremlar LRM (Vertical Grade) then when cured, surface laps with polyethylene, prior to installing polystyrene insulation, scrim and ballast.
2. Range of Application: TRA-LRM can be used wherever a protected membrane roofing assembly is required.

DELIVERY, STORAGE AND HANDLING

1. Deliver and store materials in original packages and containers with manufacturers' seals and label intact.
2. Keep roofing materials dry; protect from adverse weather conditions.
3. Store rolls on end.

SITE CONDITIONS

1. Slope Limitations:
   • Minimum recommended slope 1:50 (1/4" in 12")
   • Backnail each felt on slopes over N/A

MANUFACTURER'S SERVICES

1. Applicator Training: available.
2. Technical Service: representatives are available for design consultation and assistance.
3. Specification / Drawings: provided on all applications.

2.1.2 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.

1. TRA Elastomeric single-ply membrane – typical physical property information available from the manufacturer, Tremco Canada.
2. Tremlar LRM, a cold applied, bitumen modified, moisture curing polyurethane elastomer, meeting the requirements of ASTM C836-89.

ANCILLARY PRODUCTS

1. Reinforcing Membrane: Burmesh woven glass
2. Flashing Membrane: Tremco TRA Sheeting / Tremlar LRM (Vertical Grade)

2.1.3 EXECUTION

PREPARATION

1. The deck must be properly designed and constructed to support and secure the TRA – LRM roof system.
2. The surface to which the roofing system is to be installed must be smooth, clean and dry.
3. Ensure wood blocking, curbs and cant strips are solidly secured and reglets and nailing strips are in place as required.
4. Prepare substrate in accordance with good roofing practices as outlined by RGC for the specific deck type.

MEMBRANE APPLICATION

1. Plan the placement of TRA sheets to facilitate the fabrication of the least number of seams; starting at the low point, position the uppermost to overlap the adjacent sheet by 102 mm (4").
2. Apply Tremlar LRM (horizontal grade) by notched squeegee to the substrate at the minimum rate of 1.2 sqm / litre (2 gal / sq). Immediately roll the TRA into the Tremlar, ensuring the sheet is fully adhered without wrinkles, blisters or fishmouths.
3. Apply Tremlar LRM over the 100 mm (4") lap of the first sheet and out onto the substrate of the second sheet. Install the second sheet.
4. Apply Tremlar LRM (vertical grade) and Burmesh over all laps such that the Tremlar extends 50-75 mm (2-3"). on either side of the leading edge.
5. Install the third and succeeding rolls as outlined above.
6. Fit plies into roof drain rims, reinforce with elastomeric sheeting adhered with Tremlar.
7. Extend plies only to top edges of can strips along bases of parapets, walls and skylights.

FLASHINGS

1. Ensure continuity of air / vapour seal at all changes in directions.
2. Install one ply of TRA Sheeting into Tremlar LRM (vertical grade).
3. Ensure that flashing extends onto roof membrane a minimum of 150 mm (6") and terminates a minimum of 200 mm (8").above roof membrane.
4. Mechanically fasten flashing membrane 200-300 mm (8-12") on centre, along outside fascia and along upper edge of wall flashing.
5. Install metal counterflashing or apply One-Coat Aluminum as a protective reflective coating at the rate of 0.8 litres / sqm (2 gal / 100 sq. ft).

SURFACING

1. Install 300 mm (12") strips of polyethylene on the cured overpours of the installed TRA. Place the specified thickness of extruded polystyrene insulation, woven polyolefin scrim fabric and ballast at the rate of 49 kg / sqm (1000 lb / square).

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2.2 Membrane Assemblies

2.2.1 Fully Adhered Protected Membrane Roof Assemblies

ROOF ASSEMBLY
Components	Options	Comments or Cautions
Roof Deck	Wood / Plywood	Prime surfaces to be adhered (with Tremlar LRM) with Tremlar LRM thinned 20% with xylene. Tape plywood joints. Wood decks require a nailed separation sheet. Steel decks require a levelling underlay.
	Concrete
	Steel
Underlay	Gypsum	Minimum 12.7 mm (1/2") thickness required, mechanically-fasten to steel deck under PRM assemblies.
	Plywood
Thermal Barrier	Gypsum	Minimum 12.7 mm (1/2") may be required between steel deck and roof system using combustible insulations. (See National Building Code).
MEMBRANE
Base Sheet	Composite Ply	Mechanically fasten to wood decks.
Roof Membrane	TRA sheet	Install TRA sheet into Tremlar LRM applied at a rate of 1.2 sqm / litre (2 gal / sq). Adhere all laps with Tremlar LRM. Overpour all leading edges with Tremlar LRM (vertical grade) and Burmesh.
	Tremlar LRM
Flashings	TRA sheet	Install TRA sheet into Tremlar LRM applied at the rate of 1.2 sqm / litre (2 gal / sq). Adhere all laps with Tremlar LRM. Overpour all leading edges with Tremlar LRM (vertical grade) and Burmesh.
	Tremlar LRM (V)
Separation Sheet	4 mil polyethylene	Place polyethylene separation sheet between cured Tremlar LRM and polystyrene insulation.
Insulation	Extruded polystyrene	Loose lay over roof membrane.
Filter Fabric	100% Polyolefin	Loose lay over insulation.
Ballast	19 mm to 38 mm (3/4" to 1 1/2") round river gravel	Deck must be capable of withstanding required loading. Install according to manufacturer's recommendations for specified insulation thickness.
	Pavers

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