Basement Flat Roof Escape Hatch, Roof Aluminum Alloy Security Door Multiple Size Options for Rooftops, Passageways, Skylights(55x55cm/21.65x21.65in)

Brand：HSOQNThe aluminum alloy roof cover is specially designed for safe and convenient passages. It uses hydraulic power-assisted opening and internal locking design to save worry and effort every time you enter and exit. It provides reliable load-bearing and wind and rain protection to ensure your indoor safetyProduct name: Aluminum alloy roof access coverMaterial: aluminum alloyColor: dark grayAluminum alloy thickness: 1.2mm/0.047inFunction: protection/security/anti-theft/energy savingFeatures: Strong, high strength, weather-resistant, anti-fadingInnovation: Hydraulic support rod/internal locking/cover wider than chassis (waterproof)Size: Provide common inner diameter sizes and support customizationPackage contents: 1×roof access cover, 4×boltsMeasurement tips: The inner diameter of the chassis ≥ the wellhead opening sizeBottom frame and cover frame: cover outer frame size = bottom frame inner diameter size + 11cm / 4.33inchThings to note:1. Please measure the opening accurately before installation and leave a gap of 1 to 2 cm around for installation2. If you need to improve the sealing, you can use sealant to fill the gap3. Do not place heavy objects or stand on the surface of the cover. The maximum load-bearing limit is 66 lb

• Weatherproof Roof Hatch: Constructed from thickened aluminum alloy, this roof access hatch is durable and resistant to hail, heavy rain, and high winds. Strong load-bearing capacity, not easy to deform after long-term use
• Secure Lockout: Aluminum Access Roof Covers are designed to provide convenient and economical access to the roof of a building. Equipped with an internal locking device that supports quick locking from the inside, effectively preventing illegal intrusion and ensuring the safety of roof access
• Sealing and energy saving: The door frame is equipped with high-performance sealing strips, which effectively blocks rainwater leakage, enhances indoor climate stability, reduces heat loss, helps reduce heating energy consumption, and improves overall energy efficiency
• Easy to install: Each access roof window cover comes with pre-drilled mounting holes and expansion screws for direct installation. You can also use sealant to further fill in the gaps to further enhance the waterproofing properties
• Versatility: Not only provides convenient roof access for various environments such as factories, warehouses, workshops and businesses. Can also be used as attic skylight cover, emergency hatch cover, basement exit cover, basement cover, manhole cover