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.

VaproShield’s Self-Adhered System Obtains a Declare Label

VaproShield announces the WrapShield SA Self-Adhered System has completed the process of obtaining a Declare label. The Declare program was launched in 2014 by the International Living Future Institute (ILFI), founder of the Living Building Challenge, to promote greater transparency in the building products industry. Referred to as a “nutrition label” for building products, Declare labels list all of the materials found in a given product, as well as its assembly site, life expectancy, and other key details to facilitate informed decisions toward positive human and environmental health. The Declare program aims to give people and businesses greater power when deciding what products to surround themselves with in their home or office.

“While VaproShield products undergo numerous internal and external audits to ensure overall healthfulness and sustainability, finally the Declare label makes it easy to present this information in a tangible way,” says Phil Johnson, managing partner. “We are excited to give our business partners the power to know exactly what goes into the product that is held within the walls of their structure.”

WrapShield SA Self-Adhered System is the first water-resistive barrier (WRB)/air barrier self-adhered sheet good membrane system to earn a Declare label placing the system at the forefront of the transparency movement. In order to qualify for a Declare label, a building product must either be free of, or declare any harmful Red List chemicals, and meet all Appropriate Sourcing Imperatives as determined by the ILFI. WrapShield SA Self-Adhered required no changes to its formulation or material components, because it was designed to be free of harmful ingredients.

“We are excited to participate in such an innovative program,” says Johnson. “It embodies our own sustainability philosophy in that [VaproShield] believes sustainability is as much about creating positive environmental impacts as it is about reducing negative ones.”

Domestically produced in the Midwest, the WrapShield SA Self-Adhered System creates a breathable, energy-efficient, continuous air barrier system that helps prevent moisture from becoming trapped in the building envelope. This can reduce instances of mold, mildew and rot, while helping maintain better indoor air quality and a more enduring building structure. An entirely self-adhering product, WrapShield SA Self-Adhered allows for quick installation that never requires the use of chemical primers.

VaproShield Used on Housing Prototype Commissioned by New York’s Office of Emergency Management

VaproShield was honored to have WrapShield SA Self-Adhered Water Resistive Vapor Permeable Air Barrier Sheet selected for use on an experimental, post-disaster housing prototype located in Brooklyn, N.Y. In development since 2008, the prototype was commissioned by New York’s Office of Emergency Management (OEM) with funding from FEMA. The U.S. Army Corps of Engineers (USACE) was designated as project manager for the prototype’s construction. Designed by Garrison Architects, the “townhouse” style post-disaster housing consists of five modular units—fabricated by Mark Line Industries—which are stacked on top of each other.

“This is an exciting innovation,” comments Phil Johnson, VaproShield Managing Partner. “These [post-disaster housing] units have the potential to provide safe, reliable housing to the victims of natural disaster as they work to rebuild their communities. VaproShield is a proud contributor.”

While the post-disaster prototype will be on-site in Brooklyn for a year, the modular units are designed to be mobile. The modular units were constructed for easy installation, deconstruction and transport.

“The idea is that no matter where a disaster occurs, these modular units can be placed on a truck and taken there,” says Johnson. “The units need to perform well in every climate, as there is no telling where they may end up, and WrapShield SA Self-Adhered helps with that.”

WrapShield SA Self-Adhered Water Resistive Vapor Permeable Air Barrier Sheet helps to regulate air flow to keep units cool in the summer and warm in the winter, thus reducing energy costs. WrapShield SA Self-Adhered was selected for use on this initial prototype as it provides superior weather protection as well as the durability to withstand exposure in a wide variety of climates.