Hurricane Impact Windows: The Complete Global Procurement & Engineering Guide

Standard tempered glass undergoes a controlled thermal tempering process, making it 4-5 times stronger than annealed glass; however, upon sufficient impact from flying debris, tempered glass shatters completely into blunt pebbles, creating an instantaneous breach in the building envelope. In contrast, Hurricane Impact Glass combines two or more sheets of heat-strengthened or tempered glass bonded permanently under heat and pressure with a resilient polymer interlayer (such as 1.52mm PVB or SentryGlas® SGP). Even if both glass layers shatter upon projectile impact, the elastomeric interlayer maintains structural integrity, adhering to the broken fragments, blocking gale-force winds, water ingress, and catastrophic interior air pressurization.

Design Pressure (DP) is a numerical measure of a window's structural capacity to withstand three primary forces: positive wind load (pushing toward the building), negative wind load (suction pulling away from the building), and hydrostatic water penetration resistance. Expressed in pounds per square foot (psf) or Pascals (Pa), a DP50 window is rated to survive 50 psf of uniform structural load (equivalent to approximately 225 km/h wind velocity), while high-performance DP80 or DP100 windows withstand over 300 km/h wind speeds. Our engineering department at Guangdong Dejiyoupin Doors and Windows Co., Ltd. custom calculates the required DP rating according to building elevation, coastal exposure categories (Exposure C/D), and local structural building codes.

Polyvinyl Butyral (PVB) is the standard impact interlayer suited for moderate wind conditions and standard missile criteria. However, SentryGlas® (SGP) ionoplast interlayers are 5 times tougher and up to 100 times stiffer than conventional PVB. When both glass lites break, SGP retains its structural rigidity, remaining upright and weather-tight even under continuous cyclic wind buffeting. Furthermore, SGP offers virtually zero risk of edge delamination, cloudiness, or moisture corrosion in harsh, humid coastal environments with high salt spray exposure.

Our impact window series are certified and engineered to comply with the most stringent global standards, including ASTM E1886 and ASTM E1996 (large missile impact Level D & cyclic pressure testing), Florida Building Code TAS 201/202/203, American NFRC (thermal U-factor and SHGC ratings), European CE (EN 12210 wind resistance, EN 12208 watertightness), Australian AS2047, Canadian CSA, and ISO 9001 quality management benchmarks.

Yes. The composite structure of laminated impact glass is an extraordinary acoustic damper. Standard single-pane windows offer an STC (Sound Transmission Class) of roughly 26-28 dB, whereas DERCHI hurricane impact windows achieve STC ratings between 38 dB and 45 dB, dramatically diminishing outside traffic, flight path, and storm noise. In addition, the virtually impenetrable glass-interlayer matrix combined with our patented Four-Side Six-Point locking system resists prolonged forced entry attacks with crowbars and hammers, providing 24/7 anti-theft security without ugly security bars.

For coastal and marine environments, Guangdong Dejiyoupin Doors and Windows Co., Ltd. utilizes aviation-grade 6063-T6 aluminum treated with Qualicoat Class 2 certified marine powder coatings (minimum 60-80 microns thickness) or high-grade architectural fluorocarbon (PVDF) 3-coat paints that endure 3,000+ hours of continuous neutral salt-spray (NSS) testing. All structural assembly screws, friction hinges, rollers, and lock mechanisms are manufactured strictly from 304 or 316-grade austenitic stainless steel to eliminate galvanic corrosion.

Exporting fragile, heavy impact windows across trans-oceanic routes requires specialized crating. We wrap each window sash and outer master frame in static-free protective film, insert thick corrugated protective edge-corner guards, and encase the units inside heavy fumigated solid-wood or plywood crates lined with waterproof membrane sheeting and structural steel-strapped banding. Glass panes are separated by vibration-dampening cork or rubber spacers, ensuring zero glass-on-glass abrasion or frame deformation across 30 to 50 days at sea.