Membranes

We pioneered built-up roofing systems in America more than 160 years ago. Our highly reliable waterproof membrane is field-fabricated with layers of bitumen, alternating with plies of reinforcing felts.

The redundant layers give roofs exceptional resistance to water and weather. As a result, we have long-lasting, durable and worry-free systems. Few roofing companies can claim to have created nearly one billion feet of BUR that are today under full guarantee.

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Fiber Glass-Reinforced, SBS Modified Bitumen Base or Ply Sheet

Meets the requirements of ASTM D 4601, Type II

GlasBase Plus is intended to be used as a base sheet in built up roofing or as a base or intermediate ply in modified bitumen systems.

SBS (Styrene-Butadiene-Styrene) Synthetic Rubber and High Quality Asphalt Blend: Brings elasticity and flexibility to the sheet; lays flat virtually eliminating wrinkles resulting in fast, efficient applications.

Fully-Coated Mat: No pinholes prevent asphalt bleed-through, eliminating splitting problems associated with excessive membrane attachment to nailable decks. Excellent nail retention properties and resistance to uplift forces. Virtually eliminates wrinkling, resulting in fast, efficient applications.

Non Porous Composition: Allows the product to be used as a ply sheet in systems that employ cold process mastics such as JM BUR Adhesive.

Fiber Glass Reinforcement Mat: Low moisture, excellent dimensional stability and resistance to rot make it an ideal replacement for organic base sheets. Provides a solid dimensionally stable substrate for other roofing membrane components.

Surfacing: Fine mineral parting agent

GLAS-BASE-PLUS-700x4671
Available Documents

Fiber glass-reinforced, mineral-surfaced cap sheet.

Meets the requirements of ASTM D 3909

GlasKap is used as a cap sheet in a variety of built up roofing systems.

Asphalt Coated, Fiber Glass Reinforcement Mat: Low moisture, excellent dimensional stability and resistance to rot make it an ideal replacement for organic cap sheets.

Ceramic-Coated Granules: Provide protection to the underlying bitumen and membrane, and have a low maintenance cost compared to roofs that use coatings.

GlasKap PLUS-700x4681
Available Documents

Fiber Glass-Reinforced, BUR Reflective Mineral-Surfaced, Cool Roof Cap or Flashing Sheet

Meets the requirements of ASTM D 3909

GlasKap CR G is intended to be used as a cap or flashing sheet in built up roofing systems.

Reflective Roofing Granules: Specifically engineered for high reflectivity, durability and optimal embedment in the BUR asphalt sheet.

High-Quality Asphalt Coating: Lends elasticity and flexibility to the sheet and provides waterproofing value.

Fiber Glass Reinforcement Mat: Low moisture, excellent dimensional stability and resistance to rot make it an ideal replacement for organic cap sheets.

Color: Reflective cool roof bright white roofing granules.
 

GLAWKAP-CR-G-700x4671
Available Documents

Fiber glass-reinforced, SBS modified bitumen, mineral-surfaced cap sheet.

Meets the requirements of ASTM D 3909

GlasKap Plus is used as a cap sheet in a variety of built up roofing systems.

SBS (Styrene-Butadiene-Styrene) Synthetic Rubber and High Quality Asphalt Blend: Brings elasticity and flexibility to the sheet; lays flat virtually eliminating wrinkles resulting in fast, efficient applications. Provides better elongation and cold flexibility properties than traditional asphaltic cap sheets.

Fiber Glass Reinforcement Mat: Low moisture, excellent dimensional stability and resistance to rot make it an ideal replacement for organic cap sheets.

Ceramic-Coated Granules: Provide protection to the underlying bitumen and membrane, and have a low maintenance cost compared to roofs that use coatings.

Glascap-700x468
Available Documents

Fiber glass-reinforced, asphalt-coated ply sheet IV.

Material meets the requirements of ASTM D 2178, Type IV

GlasPly IV is intended for use as an interply in any built up roofing or modified bitumen roofing system.

Excellent Porosity: Easy to handle, lays flat, minimizes workmanshiprelated problems such as fishmouths, wrinkles and ridges. Allows the product to readily accept hot asphalt and disperses it throughout the entire felt, to stabilize asphalt after cooling.

Asphalt Impregnated, Fiber Glass Reinforcement Mat: Offers consistent tensile strength and tear resistance. Low moisture, excellent dimensional stability and resistance to rot make it an ideal replacement for organic ply sheets. Provides a solid dimensionally stable substrate for other roofing membrane components.

Laying Lines: Before the product is wound into rolls, it is imprinted with laying lines on the top surface so the roofing mechanic can install the felt with the proper exposure and provide the correct number of plies.

Surfacing: Liquid parting agent eliminates sticking when the felt is unrolled.

GlasPly-IV-700x468
Available Documents

Premium fiber glass-reinforced, asphalt-coated ply sheet VI.

Material meets the requirements of ASTM D 2178, Type VI

GlasPly Premier is intended for use as an interply in any built up roofing or modified bitumen roofing system.

Excellent Porosity: Allows the product to readily accept hot asphalt and disperse it throughout the entire felt, to stabilize the asphalt after cooling.

Asphalt Impregnated, Fiber Glass Reinforcement Mat: Delivers high tensile strength to resist splitting that can be caused by rooftop stresses. Low moisture, excellent dimensional stability and resistance to rot make it an ideal replacement for organic ply sheets. Provides a solid dimensionally stable substrate for other roofing membrane components.

Laying Lines: Before the product is wound into rolls, it is imprinted with laying lines on the top surface so the roofing mechanic can install the felt with the proper exposure and provide the correct number of plies

Surfacing: Liquid parting agent eliminates sticking when the felt is unrolled.

GlasPly-Premiere-700x548

Albuquerque High School: Creative After-school Activities Go to the Roof

Solano County Government Center County Administration Building

Dura-Bar Heavy Industrial Manufacturing Facility

Available Documents

Polyester/fiber glass-reinforced, asphalt-coated base, ply or flashing sheet.

Meets the requirements of ASTM D 4601, Type II 

GlasTite Flexible is intended to be used as a base sheet, ply sheet, or flashing membrane in built up roofing systems.

Fiber Glass/Polyester Composite Reinforcement Mat: Provides superior flexibility and conformability, making it easy and quick to install. Exceptionally high tensile strength delivers superior protection against splitting as well as excellent puncture and tear resistance to prevent damage often caused by rooftop traffic.

Ideal for Flashing Systems: Superior flexibility and conformability allows the mechanics to easily and quickly install tight flashing systems and make it ideal for all roof terminations, including parapet walls, skylights, roof penetrations, drains, vents and roof edges. GlasTite Flexible does not bridge at the cant and will not pull away from the substrate after it has been installed.

Laying Lines: Laying lines are imprinted on the top surface so the roofing mechanic can install the felt with the proper exposure and provide the correct number of plies.

Surfacing: Fine mineral parting agent

GlasPly-IV-700x468
Available Documents

Polyethylene-reinforced, self-adhering SBS vapor barrier.

Tri-laminate woven polyethylene, nonslip, UV-protected top surface: Provides temporary weather protection for 90 days. Provides high tensile strength and puncture resistance.

Self-sealing, high-quality SBS rubber and asphalt blend: Provides low air and vapor permeability.

Silicone release film: Allows for ease of self-adhering installation.

Installation Guides

JM Vapor Barrier SA Installation Guide 

Available Documents

Fiber glass-reinforced, asphalt-coated lightweight base sheet.

Material meets the requirements of ASTM D 4601, Type II

PermaPly 28 is designed for use as the first or base sheet in built up roofing or modified bitumen roof assemblies.

Lightweight: Exceptionally pliable, easy to handle and lays flat.

Asphalt Coating: Makes it suitable as an intermediate or ply felt in cold-applied built-up and modified bitumen roof assemblies.

Ideal for Mechanical Attachment: Use where mechanical attachment of the membrane to the roof substrate or deck is desired.

Fiber Glass Reinforcement Mat: Low moisture, excellent dimensional stability and resistance to rot make it an ideal replacement for organic base or ply sheets. Provides a solid dimensionally stable substrate for other roofing membrane components.

Laying Lines: Laying lines are imprinted on the top surface so the roofing mechanic can install the felt with the proper exposure and provide the correct number of plies.

Surfacing: Fine mineral parting agent.

PermaPLy-700x468
Available Documents

Fiber glass-reinforced, asphalt-coated venting base sheet.

Material meets the requirements of ASTM D 4897, Type II

Ventsulation Felt may be used as a base sheet for any built up roofing or modified bitumen roofing system to be installed over a substrate that potentially contains moisture.

1" Embossed Waffle Pattern Grid Channels: Promotes moisture vapor venting. Helps prevent blistering of asphalt-based roofs when installed over potential moisture-containing substrates such as: Re-covers over existing roof membranes, lightweight insulating fill or gypsum decks.

Fiber Glass Reinforcement Mat: Low moisture, excellent dimensional stability and resistance to rot make it an ideal replacement for organic base sheets. Provides a solid dimensionally stable substrate for other roofing membrane components.

Surfacing: Coarse minerals on one side.

Vensulation-700x531
Available Documents