H-Shield HD Composite CG is composed of two products, H-Shield HD – a 1⁄2″ hi-density polyiso cover board – manufactured on-line to H-Shield CG – a premium performance faced polyiso – creating a monolithic composite panel. This product is ideal for commercial roofing projects that require high thermal efficiency combined with maximum durability in both new construction and retrofit applications. R-value is optimized with a thinner profile than any other insulation available on the market.