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    Credit: Noah Kalina

SecurShield HD Composite by Carlisle SynTech consists of a 1/2"-thick, high-density polyisocyanurate cover board laminated to rigid polyisocyanurate roof insulation. It can be used on single-ply membrane systems for new and retrofit installations. Available in 4'-by-4' and 4'-by-8' panels, the 2"- to 4"-thick system provides R-values between 11.5 and 27.2. With respective compressive strengths of 100 and 20 psi, the cover board and insulation board achieve an FM 1-90 wind uplift rating. • carlislesyntec.com