PIMA Issues Technical Bulletin on High-Density Polyiso Cover Boards

The Polyisocyanurate Insulation Manufacturers Association (PIMA) announced the release of a new technical bulletin detailing the advantages of high-density polyiso cover boards. High-density polyiso cover boards are an important component in roof systems, providing a substrate for roofing membranes and protection for underlying insulation.

“PIMA’s new technical bulletin illustrates that high-density polyiso cover boards perform well with less structural loading and improved long-term maintenance when compared to other options,” said Justin Koscher, President of PIMA. “We see broad acceptance of these high-density boards in both new construction and the retrofitting of existing roofs.”

According to the technical bulletin, high-density polyiso cover boards, when compared to other options offer project teams many advantages:

  • Can be shipped with approximately three times more square feet per truck load.
  • Are significantly lighter than alternatives of the same thickness.
  • Require less crane time and are easier to maneuver around the roof which can decrease the
    hoisting, loading and staging costs.
  • Are virtually dust-free during the cutting process, eliminating itchy residue.
  • Can be cut without specialized tools.
  • Can be lifted by a single worker.
  • High-density polyiso cover boards also provide high R-value, superior water and mold resistance while boasting impressive long-term durability and service life, according to the association. Their compressive, flexural and tensile strength provide impact resistance from foot traffic, hail and other extreme weather. These boards also contribute toward meeting or exceeding the newest continuous insulation standards and can qualify buildings that use them for preferred insurance ratings.

    “In terms of both installation and effectiveness over time, high-density polyiso cover boards provide savings and deliver superior results from installation through the life of the roof,” added Koscher.

    The new technical bulletin with full details can be found along with other information about polyiso products on PIMA’s website

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    SPRI Distributes ‘PV Ready’ Technical Bulletin

    Waltham, Mass.-based SPRI’s Technical Committee and board of directors have approved and distributed to the organization’s members Technical Bulletin 1-13A, “Summary of SPRI Membrane Manufacturer Photovoltaic (PV) Ready Roof Systems and Services”. The bulletin contains general guidelines from SPRI related to “PV Ready” roof assemblies and services designed to provide maximum protection for the roof (and maintain its warranty coverage). SPRI represents sheet membrane and component suppliers to the commercial roofing industry.

    “Commercial rooftops are a convenient platform for installing solar photovoltaic systems,” says SPRI Technical Director Mike Ennis. “However, it’s important to remember that the roof’s primary function is to protect the building’s contents and its people from the elements.”

    Technical Bulletin 1-13 raises important considerations for the building owner, such as the added weight of a PV array and the impact of wind and fire approvals. The bulletin also lists potential PV system-specific requirements from manufacturers to maintain existing warranties; project documentation forms frequently required to install the PV system over an existing warranted roof; and general issues and additional services offered by manufacturers, such as single-source warranties for the roof system and solar integration.

    SPRI gathered the information included in Technical Bulletin 1-13 from a survey of information available on websites and literature of SPRI member membrane manufacturers. As such, the bulletin serves as a summary of the PV-ready products, requirements and services currently offered by SPRI members and is available for distribution to customers.

    “Each SPRI member may have its own PV ready program, and no SPRI member may necessarily be considered to have all program elements,” Ennis adds. “The building owner should always consult the manufacturer of the roof system specified for the new construction or reroofing project prior to the installation of a PV system on a warranted roof.”

    In addition, Ennis writes about PV Ready rooftop considerations in “Tech Point”.