Carlisle TPO Membrane Installation Guidelines

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Carlisle TPO Membrane 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.


ontact Address: See Membership List in Section 1.


Country of Origin: USA

Coutnry of Manufacture: U.S.A.

Year First Installed
BC: 1998
Canada: 1996
Foreign: 1990

1 Description

Carlisle’s Sure-Weld roofing systems utilize a material which offers high resiliency and reflectivity, with the added benefits of heat-welded seams. Heat-welding fuses individual sheets of membrane, creating a monolithic assembly and a consistent, smooth appearance.

The Sure-Weld membrane provides long term ultraviolet and ozone resistance, and is environmentally friendly because it is compounded without chlorine. It is available in fully adhered and mechanically attached systems, with Factory Mutual, UL and ULC approvals.

Sure-Weld Roofing Systems utilize either a .045" or .060" thick reinforced thermoplastic polyolefin membrane. The membrane is supplied in 8 and 10 foot widths, and is available in white and grey.


The roofing system / material information published in the RoofStar Roofing Practices Manual does NOT represent a complete set of the manufacturers published data, nor does it represent a detailed specification. The preparation of a detailed specification is the responsibility of the design authority.


  1. Sure-Weld roofing systems are intended for installation on commercial, industrial, and institutional projects. These systems can be used in both new construction and re-roofing.
  2. Can be installed over most roof decks / substrates (steel, wood plank, plywood, OSB, pre-cast, poured in place and lightweight concrete, etc.).
  3. The mechanically attached system has a maximum slope limitation of 18 inches of rise in one horizontal foot. There is no maximum slope restriction on the fully adhered system.


  1. Deliver materials to the job site in the original, unopened packaging.
  2. Store Sure-Weld accessories in a dry protected areas between 60 and 80 degrees F. Lids on all containers must be securely closed. Store the Sure-Weld membrane in the original wrap.
  3. Insulation and underlayment must be stored so it is kept dry and is protected from the elements.


.1 Slopes
Minimum slope:
  • the roof system assembly should be designed to prevent ponding of water on the roof for prolonged periods (longer than 48 hours).
Maximum slope:
  • Mechanically fastened: 18" in 12"
  • Fully adhered: no restriction
.2 Application Temperature:
  • minimum: - 30 degrees C
  • maximum + 40 degrees C
The temperature range for accessory items may vary. Contact manufacturer for details.
.3 Chemical Incompatibilities:
Petroleum based products, certain chemicals and waste products may not be compatible with the Sure-Weld roofing system. Carlisle must be contacted for verification of compatibility.


  1. Factory Mutual: FM 1-60, 75, 90, 105, 120
  2. Underwriters Laboratories: Class A & B
  3. Underwriters Laboratories of Canada: Class C
For ratings on specific roof assemblies consult Carlisle SynTec Canada.


  1. Sure-Weld roofing systems are installed by Carlisle trained and authorized roofing contractors. Carlisle Technical Specialists provide contractor authorization training, upgrade training, on site training, technical assistance, and inspections.
  2. Carlisle’s technical and sales personnel are available to provide assistance to roof designers.


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.


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


Non-Reinforced Flashing
Rolls: 12 inches and 24 inches wide by 50 feet long For flashing inside / outside corners, pipes, etc.
Reinforced Flashing
Rolls: 6 inches wide by 100 feet long For flashing metal edge details.
Sure-Weld Bonding Adhesive
High strength, synthetic rubber adhesives for bonding Sure-Weld membrane to various surfaces.
Cut-Edge Sealant
Used to seal cut edges of reinforced Sure-Weld membrane.
Water Cut-Off Mastic
Mastic used to prevent moisture migration at drains, and compression type details.
CCW – 102C Sealant
Used to fill sealant pockets, and where details call for exposed caulking.
Sure-Weld Membrane Cleaner
Used to prepare membrane that has been exposed to the elements for approximately 7 days prior to welding.
Brite-Ply Splice Cement
Used for adhering flashing to metal edgings or scupper inserts.
Sure-Weld Coated Metal
Galvanized steel sheet metal with a layer of Sure-Weld for fabrication as a metal drip edges. Sure-Weld membrane or flashing can be directly heat welded to this product
Pre-Molded Accessories
Inside / Outside Corners
Pipe Flashings: available for pipes 1/2 inch to 6-1/2 inch diameter.
Sealant Pockets: available in 6 and 8 inch diameter.
HP-X Fastener: #15 threaded fastener for steel and wood
HP Concrete Spike: hammer driven, non-threaded, for use in min. 3,000 psi concrete
HP 14-10 Concrete Fastener: #14 threaded fastener, for use in min. 3,000 psi concrete
Fastening Plates
Piranha Plates - 2-3/8 inch diameter barbed fastening plate for use with the Carlisle fasteners
Insulation Fastening Plates: nominal 3 inch diameter plate for use with appropriate Carlisle fasteners.



.1 On retrofit-recover projects, cut, remove and replace wet insulation.
.2 Substrate must be even without noticeable high spots or depressions, and must be free of water, snow, and / or ice.
.3 Clear the substrate of debris and foreign material. Roof cement must be removed.


.1 Selection of suitable insulation, insulation thickness, and fastener frequency are selected based on project specifics. Options are based on Carlisle’s Design Criteria, code approvals, and project specifications. Consult Carlisle for specifics.
.2 Insulation shall be fastened in accordance with specifications.
.3 Sweep loose debris from substrate.


.1 The type of fastener and plate for securing the membrane is determined by deck type.
Consult Carlisle specification for details.
.2 Sheet size (8 and 10 foot), number of perimeter sheets, and fastener frequency are based on the specific requirements for the individual project.
.3 Position perimeter sheets along the perimeter of the roof. Five (5) foot wide perimeter sheets are used with 10’ field sheets, 4 foot perimeter sheets with 8 foot field sheets. A minimum of one (1) perimeter sheet is required.
.4 Position adjoining sheets to allow for an overlap of approximately 5-1/2" at those locations where Fastening Plates are located (along the length of the membrane), and a minimum of 2" for the splice at end of the roll.
.5 Secure the membrane at the approved fastening density with the required fastener and plate.


.1 Position Sure-Weld Membrane allowing for a minimum 2" overlap. Fold back so half of underside is exposed.
.2 Apply Sure-Weld Bonding Adhesive to both the membrane and the substrate, keeping adhesive out of the splice area.
.3 After adhesive has flashed off, roll the coated membrane into the coated substrate. Immediately brush down the bonded section to ensure full contact.


.1 Hot air weld the Sure-Weld membrane sheets using the Automatic Hot Air Welding Machine, or Hand Welder and silicone roller.
.2 Consult Carlisle specifications for details of welding procedures, requirements for test cuts, and equipment.
.3 All seams are to be probed and repairs made at the end of each working day.


.1 The membrane must be secured at the perimeter of each roof level, roof section, expansion joint, curb, skylight, or other penetration, or angle change over 2 in 12. Refer to Carlisle Sure-Weld specifications and details.
.2 Flash all wall and curbs with Sure-Weld reinforced membrane.
.3 Non-Reinforced membrane shall be limited to inside and outside corners, field fabricated pipe seals, scuppers, and Sealant Pockets where the use of pre-molded accessories are not practical.