Vapor Permeable Underlayment Designed for Use on Steep-Slope Roofs

VaproShield announces the release of SlopeShield Plus Self-Adhered, a highly vapor-permeable roofing underlayment Air Barrier (AB) material. SlopeShield Plus Self-Adhered (SA), a vapor permeable roofing underlayment, is designed for use on steep slope roofs of 2:12 or greater pitch. According to the manufacturer, the roofing underlayment features the patent-pending Vapor Permeable Polymer Composite Technology (VPPCT) developed by VaproShield.

“VPPCT combines advanced polymer coatings and our proprietary adhesive to create a primerless, highly-permeable, and fully-adhered [roofing] underlayment that is revolutionary to the industry. The black color also absorbs heat from the sun (while exposed), which increases the drying process of wet sheathing and insulation,” said Kevin Nolan, Technical Director of North America. “Every part of SlopeShield Plus, including the color, was intentional.” 

The development of SlopeShield Plus Self-Adhered came from an existing market demand for a high-performance and permeable roofing underlayment. Traditional asphaltic and butyl-based peel-and-stick roofing underlayments offer liquid-water holdout but lack drying capacity due to their non-permeable nature. These underlayments inherently trap moisture, reducing insulation performance and accelerating sheathing decay-potentially causing premature roof assembly failure.

“The industry has had traditional [asphaltic and butyl-based] underlayments for years. We are always working to push the industry forward,” noted Lee Snyder, Managing Partner of VaproShield.

SlopeShield Plus Self-Adhered offers superior performance to the polypropylene tri-laminate micro-porous permeable existing roof underlayments. The superior construction technology of SlopeShield Plus Self-Adhered is a composite of polymers and polyester in a sheet good that allows vapor diffusion. According to the company, the design of SlopeShield Plus Self-Adhered eliminates the water leakage created by the concussion effect (caused by heavy rain and foot traffic) while allowing for 6-month UV and climate exposure prior to roof system installation.

SlopeShield Plus Self-Adhered is compatible with metal roofing, slate/clay tile with batten/counter-batten substructures, and cedar shingles/shakes with VaproMat. VaproShield offers SlopeFlashing in two sizes: 29.5 inches and 19 2/3 inches. SlopeFlashing is used to flash eaves, hips, ridges and valleys.

Combining SlopeShield Plus SA and VaproShield’s vapor permeable WRB/Air Barrier wall membranes will create an airtight and watertight building enclosure that offers high drying capacity for the building envelope and roofing assembly-mitigating moisture damage and saving energy for the life of the building. A National Institute of Standards and Technology (NIST) study (NISTIR 7238) showed that an effective air barrier can reduce a building’s energy costs by as much as 40 percent and electrical costs by more than 25 percent.

For more information, visit www.vaproshield.com.

Redesigned High-Temp Underlayment Offers Improved Walkability, Reduced Bleed-Through

Polyglass U.S.A. Inc. announces that Polystick MU-X self-adhered, high-temperature underlayment has been redesigned. A secondary water barrier for roof coverings, Polystick MU-X features an enhanced black polypropylene film, improving membrane walkability and reducing bleed-through.

Polystick MU-X is designed especially for high-temperature environments. It is rated as temperature resistant to 250 degrees Fahrenheit and has an exposure window of 90 days for job flexibility. Polystick MU-X features a proprietary SBS modified bitumen upper compound and patented ADESO dual-compound self-adhered technology on the bottom side of the reinforcement. A split-release film on the bottom of the roll allows for ease of application. Convenient 3-inch lay lines printed on both edges allow bi-directional installation, saving time and labor. 

“We are excited about the performance improvements we have made to the Polystick MU-X underlayment,” said Polyglass CEO Natalino Zanchetta. “We made the enhancements based on customer feedback and our commitment to adding value by meeting or exceeding customer expectations and increasing customer satisfaction.” 

For more information, visit https://polyglass.us.

Self-Adhering, High-Temperature Roofing Underlayment

MFM Building Products, a manufacturer of a full envelope of waterproofing and weather barrier products for the building industry, offers a new high-temperature roofing underlayment, Premium HT Tile & Metal.

This self-adhering roofing underlayment is composed of a high-grade, reinforced polyester fabric laminated to a high-temperature asphalt adhesive system. This premium product also has a fiberglass-reinforced core for extreme durability. Product features a 3-inch (7 cm) selvedge edge to ensure a secure, monolithic seal. The surface fabric offers excellent foot traction and for stacking tiles during construction. UV exposure is 180 days.

Premium HT Tile & Metal is intended to be used as a whole-roof underlayment. It will withstand the high temperatures created by metal and tile roofing with a high temperature rating of 250°F (121°C). The top surface bonds well with foam adhesive systems and works well with nail-down tile roofs. It may also be used underneath cedar shakes, and synthetic or asphalt shingles. Premium HT Tile & Metal is self-sealing around common roofing fasteners to ensure a complete waterproof barrier.

The underlayment has a nominal thickness of 60 mils and is available in a 36 inch x 67 feet (91 cm x 20.4 m) roll size. Product meets ASTM D 1970 and TAS 103-95 through independent, third-party testing, and has been submitted for product approvals. Premium HT Tile & Metal comes with a 30-Year Limited Warranty.

For full technical data, installation instructions or to request a free product sample, visit www.mfmbp.com

High-Temperature Self-Adhered Underlayment

Boral Roofing offers its MetalSeal UnderlaymentBoral Roofing offers its MetalSeal Underlayment, a high-temperature self-adhered underlayment designed especially for metal roofing but suitable for any roof material in any climate. A high-performance waterproofing material, Boral MetalSeal underlayment provides all season durable protection, protecting the structure against wind, rain, snow and ice dams by bonding to the base sheet or directly to the roof deck and self-sealing around every fastener penetration. According to the company, Boral MetalSeal is easy to install and eliminates the need for an excessive number of nails, reducing installation time and cost. Great surface traction also enables safer, faster and easier installation for the entire roof. The high-strength woven polyester surface remains intact under high foot traffic and provides UV resistance up to six months.

According to the manufacturer, Boral MetalSeal offers a 30-year limited warranty and may be installed in freezing or hot summer temperatures alike, ensuring the job is completed without weather-induced delay. MetalSeal meets or exceeds all National and Florida building code requirements and is rated up to 260 degrees Fahrenheit. It comes in 216 square foot rolls for a net two squares.

For more information, visit www.BoralRoof.com.

Synthetic and Peel-and-Stick Underlayments for Metal Roofing

HydraShell MAX and HydraShell Supreme SA are McElroy Metal’s new underlayments. HydraShell MAX is the standard synthetic underlayment and HydraShell Supreme SA is a peel-and-stick underlayment. HydraShell MAX has a four-layer construction and can be used under all types of finished roofing materials, including steel roofing and is suitable for roof pitches as low as ½:12. HydraShell MAX requires significantly fewer fasteners than competitive products and provides a durable deck cover. HydraShell Supreme SA is the best choice in high-temperature, self-adhering applications. The SBS modified asphalt provides excellent pliability and the cool gray surface reduces heat build-up. 

For more information, visit www.mcelroymetal.com.

Granulated Self-Adhered Roofing Underlayment Features Slip-Resistant Surface

RhinoRoof Granulated Self-Adhered Roofing Underlayment The RhinoRoof brand of synthetic roofing underlayment now includes comprehensive roof deck protection. Comprised of the most advanced formulations for self-adhered roofing technology, new RhinoRoof Granulated Self-Adhered Roofing underlayment features a granulated, slip-resistant surface. The new synthetic underlayment offering complements contractors’ safety programs by providing a slip-resistant surface material on roofs of varying slopes. When paired with RhinoRoof U20 synthetic underlayment, the Granulated Self-Adhered Roofing Underlayment provides a system approach to protecting the entire roof deck against ice dams and wind-driven rains.

“RhinoRoof Granulated Self-Adhered Roofing Underlayment provides protection in the most vulnerable areas of the roof such as eaves and valleys,” said Jim Stange, Product Manager for Self-Adhered Underlayment. He noted the “peel and stick” product offers excellent adhesion across a broad temperature range. “The new granulated self-adhesive underlayment has been tested for adhesion at 40F and 75F and exceeds D1970 standards,” he said. The product can be left exposed for up to 30 days. Even at cold temperatures, the RhinoRoof® Granulated Self-Adhered Roofing Underlayment adheres to the roof deck, supporting flexible installation during seasons when temperatures can fluctuate widely.

Accroding to the company, multiple features contribute to the performance of RhinoRoof Granulated Self-Adhered Roofing Underlayment. The granulated surface features a 3-inch taped selvage edge and a polymer modified asphalt backing. The split sheet peel-away release liner facilitates easy installation on a broad range of roof designs. The product is packaged in a shrink-wrapped poly-sleeve, making it less susceptible to damage from the elements and easy to carry on the jobsite.

For more information, visit www.eavetopeak.com.

MFM Building Products Underlayment Can Be Used in Vertical Applications

Ultra HT Wind & Water Seal MFM Building Products, a manufacturer of a full envelope of waterproofing and weather barrier products for the building industry, announces that its Ultra HT Wind & Water Seal high-temperature roofing underlayment can be used for vertical side wall applications.

This self-adhering “self-stick” membrane is composed of a cool white, cross-laminated, high density polyethylene film laminated to a high-temperature rubberized asphalt adhesive system rated to 250 degrees Fahrenheit. According to the manufacturer, this premium product is extremely tough, is self-sealing around fasteners and offers a 90-day UV exposure rating.

The company states that Ultra HT is ideal for vertical applications under metal panel systems and parapet walls capped with metal tiles. The high-temperature adhesive system withstands the high temperatures generated by these systems to ensure complete waterproofing protection. Special installation instructions must be followed for all vertical applications.

Ultra HT has a thickness of 45 mils and is available in a 12-inch, 18-inch and 36-inch by 67-foot length rolls. As a roofing membrane, Ultra HT meets ASTM D 1970, Florida Building Code FL16562, and Miami-Dade County NOA 13-1125.06. The product comes with a 10-Year Limited Warranty.

For more information, installation instructions or to request a free product sample, visit www.mfmbp.com.

High-Performance Synthetic Underlayment Designed for Durability, Traction

CertainTeed offers RoofRunner, a high-performance synthetic roofing underlayment, bringing additional versatility to CertainTeed’s roofing product line. At just 23 pounds per 250-foot roll, RoofRunner is easy to handle, according to the company, with a high-traction surface designed for wet or dry walkability.

According to the manufacturer, RoofRunner is very durable and water resistant. The product features 90-day UV exposure and resists tearing caused by stretching, high winds and foot traffic. The underlayment is designed to firmly grip to the roof deck, providing a stable surface for builders and reducing pulling against mechanical fasteners. Its light gray surface offers a cool working environment, so those working on roofs all day have fewer worries about overheating. 

RoofRunner exceeds the performance requirements of ASTM D226 and D4869, notes the company. It conforms to UL 790/ASTM E108 for Class A fire resistance, is Florida Product Control Approved, and also conforms to the ICC-ES AC188 standard. RoofRunner qualifies as a component in CertainTeed’s Integrity Roof System
RoofRunner high-performance synthetic inderlayment from CertainTeed

Synthetic Underlayments Designed to Provide Excellent Traction

Tyvek Portec UnderlaymentDuPont Tyvek offers the Protec line of roofing underlayments, which feature a unique embossed pattern allowing for better traction and grip while walking on the roof. Tyvek Protec 120, Protec 160 and Protec 200 provide increasing quality, durability, strength, warranty protection and UV resistance. The portfolio of products is suitable for use by professional roofing and exterior contractors in new construction or re-roofing projects as a secondary water barrier on steep-sloped roofs (2:12 or higher) under asphalt shingle, tile, metal, cedar or slate.