Getting stickier

Adhesive attachment for roof insulation systems is becoming more predominant

Roofing contractors always are looking for better, quicker and easier methods to install insulation in roof systems. Sometimes, there are job-specific constraints, such as the inability to use mechanical fasteners (screws and plates) or materials that create unpleasant odors. When something like this occurs, the use of a polyurethane roof insulation board adhesive may be the solution.


There are two types of polyurethane roof insulation board adhesives used to secure elements of roof systems: one-component and two-component. One-component products generally are known as "moisture-cured" adhesives, and two-component products generally are known as "chemically cured" adhesives. Both inherently do not penetrate deck systems and are considered to be odorless or low-odor materials.

To properly activate and set, one-component adhesives rely on moisture in the air. One-component adhesives generally are sprayed from a portable, pressurized container using a wand that produces a polyurethane foam bead or poured from 1-, 2 1/2- or 3-gallon canisters in a semiliquid state. A single canister can be used to place a single bead of adhesive, or a wheeled piece of equipment capable of carrying four or more canisters of adhesive can be used to place multiple beads of adhesive at one time.