Our high-performance hinges include heavy-duty UNIGEAR and UNIPIN continuous hinge systems built for durability in high-traffic or high-abuse areas. Both are ideal for both new construction and retrofitting damaged doors that can no longer support conventional hinges.

We also offer mortise-type cam lift hinges, both standard-weight and heavy-duty, for sound control applications or jobsite conditions requiring the door to be lifted out of the opening. Made from aluminum or flexible rubber, our child finger-guard shields mortise-type hinges for hospital and workplace, as well as childcare and school applications. Fire-rated hinges available.

Installation alignment problems and door warp from changes in temperature and humidity are common causes of performance-degrading gaps in door gasketing. ZEROA's adjustable sealing systems provide adjusting screws along the length of the door gasket that can be tightened easily using a screwdriver to restore a tight seal.

While leaky gasketing is always inefficient, adjustable gasketing delivers special value for life safety applications and other systems where optimal performance is critical. Using these systems, building owners subject to annual fire door inspections under NFPA 80 2007 can avoid expensive repairs to correct fire ratings compromised by leakage through even the smallest gaps door seals. Because unsealed gaps in sound barriers eliminate the noise-reduction benefits of even the highest-rated sound doors, adjustable gasketing is also the cost-effective answer to restoring the airtight seals needed for all sound control applications.

Available from ZERO as surface-applied door bottoms and concealed door bottoms in a range of models, all engineered with highest-quality materials for precise installation. These components are preferred for maximum service life in high-traffic applications. Our special-purpose door bottoms give optimal results to help meet the biggest challenges in sealing door perimeters, including sound control applications requiring air-tight perimeter seals to maintain STC ratings. More stringent code requirements for life safety applications now being enforced in some jurisdictions, such as pressurizing stairwells for smoke protection under NFPA 105, call for use of automatic door bottoms.

As evolving codes and standards make reliable performance more critical than ever, using the right gasketing for each application is increasingly important. Great gasketing is what first made the ZERO name synonymous with quality. Our door gaskets for protecting head, jamb and meeting stiles are designed for top performance and built to last in specific, demanding environments. From weatherstripping for climate control in all extremes, to positive-pressure fire-rated systems, to efficient solutions for LEED certification - our unequaled selection of features and options is our guarantee that "what the designer wants, the designer gets."

ZERO's top-quality materials and construction are designed to stand up to the demands of heavy traffic as well as temperature extremes. The heavy-gauge material in our saddles and thresholds allows drilling and screwing into concrete without the difficulties experienced using lighter materials, such as buckling under heavy loads or loose screws.

Our wide selection of specialized models provides maximum design and installation flexibility, including:

Energy-efficient thermal-break door saddles A,A- available with either unfinished oak inserts for staining and coating, or aluminum inserts, with options for wheelchair accessibility. Adjustable-width systems with saddle rests that interlock with various size plates. Much easier to trim and fit than conventional, single-size cast-bronze saddles, these thresholds install without exposed screws on the base for better aesthetics and durability. Adjustable-seal systems using our unique Compress-O-MaticA,® design to ensure an airtight seal even when doors are slightly warped, or misaligned because of poor installation.

Our Flood Barrier Shield protects doors and household contents from water ingress in flood-prone areas, such as wetlands or high-rainfall regions. When water from heavy rains accumulates on porches or patios, this easy-to-install, removable barrier effectively blocks up to a foot or more of flood waters from permeating door openings.

The unit complies with standards of the Federal Emergency Management Agency (FEMA) and Federal Insurance Administration (FIA) for use on doors in flood-prone areas.

"ZERO, no substitutes" is the sound-control standard for acoustical consultants nationwide and throughout most of the world. Our acoustical gasketing systems have traditionally been used to optimize high-STC applications for doors in recording studios, performance halls and other venues requiring complete noise elimination. In the fast-growing, ever-changing acoustical market, ZERO also supplies STC systems suitable for applications ranging from hotel entrances and communicating doors, to military installations and embassies. Driven by privacy and security concerns, as well as LEED certifications, demands for reliable STC-rated gasketing now span a growing range of educational, church, healthcare, courthouse and corporate facilities - and ZERO has tested systems to satisfy every need.

Traction Tread door saddles and stair nosings have profiled grooves fitted with textured inserts of specially formulated rubber for sure footing in both wet and dry conditions, indoors or outside. They also provide an aesthetic solution to ADA requirements for detectable warnings on stairs and hazardous surfaces, and are available with photoluminescent markings for use in emergency evacuations.