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


Tackling 62-Inch Ducts with Spiracoustic Plus®

Dec 9, 2025 - A sheet metal manufacturer successfully insulated massive 62-inch ducts using Johns Manville’s Spiracoustic Plus® duct liner.


NEW CDP Cable-Operated Dampers

Dec 9, 2025 - We are pleased to announce the release of the new CDP Cable-Operated Dampers for use on Titus products. 


Milwaukee Tool’s Dual-Trigger Braking Grinder Delivers Maximum Control

Dec 9, 2025 - Powered by the POWERSTATE™ Brushless Motor, the M18 FUEL™ 4-1/2" / 6" Dual-Trigger Braking Grinder delivers 13A corded performance and achieves up to 135 cuts in ½” rebar on a single charge.