Hurricane Impact Interlayers – PVB or SGP?

Hurricane Impact Interlayers – PVB or SGP? Did you know going from 120" to 122" tall may increase your cost by as much as 20%? PVB interlayers are less rigid and often limited to 40–50 SF but are significantly less expensive. Depending on the pressure chart in the hurricane product approval, PVB interlayer assemblies will have maximum size cutoffs.

Going big can have major cost implications for your project, with substantial price jumps as you cross thresholds like 50 square feet. Larger panels often require SGP, and most manufacturers add 20–40% premiums for oversized glass. Breakage risk also increases with size, pushing up insurance and handling costs.

9/16" laminated impact glass weighs about 10 lbs/SF. So at 50 SF you’re handling 500 pounds—and 60 SF is 600 pounds. That’s serious weight that impacts labor, equipment, and install logistics.

Luxury impact glass can start at $100/SF, but super-sized or specialty configurations can run over $1,000/SF. Knowing your interlayer options and their limitations is critical for balancing design intent with budget realities.

Hurricane Impact Interlayers – PVB or SGP?