XSPECT® the Unexpected With This Rooftop Ductwork Insulation Solution

XSPECT® ISOfoam APF is a durable, lightweight board insulation designed to simplify fabrication and installation while maximizing versatility. It’s easy to fabricate and install – and now it comes in both flat and tapered options to help ensure

Article content provided by Johns Manville.

After years of patching a failing high school rooftop duct insulation system, a local Chicago-based installer was finally able to completely replace the system, putting XSPECT® ISOfoam APF board to work for a solid and long-lasting solution.

Bonded to a foil facer on both sides, XSPECT is a closed-cell polyisocyanurate foam core board. The foil facer acts as an excellent vapor-retarder and together with the closed cell foam, the product creates a tightly sealed system. Lightweight and easy to install, XSPECT is perfect for applications such as rooftop ducts, HVAC equipment, refrigerated transportation, railcars and storage vessels.

Learn more about XSPECT ISOfoam APF board and its benefits.

Visit the Johns Manville website.

Have a question for Johns Manville? Contact Johns Manville here.

Johns Manville supports contractors with productivity-enhancing and performance-enhancing mechanical products, including duct, pipe, and building insulations.


Mar 28, 2024 Products & Services Update

Latest Articles


Exploring Phenolic Ductwork Systems for Energy Efficiency

Jul 10, 2025 - As the construction industry continues to prioritize energy efficiency and sustainability, pre-insulated duct systems like Kingspan KoolDuct offer a transformative approach to air distribution.


Rapid Loading, Connections, and Savings with Rapidmate

Jul 10, 2025 - The new Rapidmate® Corner lineup from Ductmate is the most advanced design, labor-saving corner system in the industry that saves time and money in both the shop and the field!


A.M. Best® Favorably Rates Federated Mutual Group and Federated Life Insurance

Jul 10, 2025 - A.M. Best Company, the most widely recognized provider of insurance industry ratings & financial data, confirmed its A+ (Superior) rating for Federated Mutual Group and Federated Life® in April 2025