What Does Roof Access Hatch Mean In Construction?
What Does Roof Access Hatch Mean In Construction?
A roof access hatch is a door-like structure that provides access to a flat roof. It consists of two main components: the upstand and the cover. The upstand is installed on the roof and the cover is used to close off the upstand.
To prevent heat loss, both the upstand and cover are insulated. The level of insulation varies depending on the brand and type of roof access hatch. For instance in new-build projects such as hospitals, schools, and apartment complexes roof access hatches with high insulation values are preferred.
The insulation value of a roof access hatch is determined by factors such as the type of insulation used, insulation thickness, and thermal separation.
These hatches are usually purchased from companies that specialize in producing roofing access solutions. The roof hatch is typically installed on the roof before the roofing installation or a curb is set on the roof in preparation for the roof membrane installation.
This allows the roofer to either flash against the roof hatches itself or the installed curb. Roof hatches usually open from the inside and feature a ladder that can be raised from the last floor of the structure.
These hatches are essential for the maintenance and servicing of mechanical units located on the roof. Some roof hatches can also be equipped with smoke or fire detectors that automatically open the hatch in the event of a fire or smoke.
This helps to vent the structure and clear it of smoke. There are different types of roof hatches that can cater to different needs ranging from those that provide easy access for maintenance purposes to others that are more suitable for accessing a roof garden or patio.
Modern roof hatches are equipped with springs or hydraulic pistons for ease of opening and closing, and also feature waterproof gaskets to prevent leaks. These features ensure that the roof hatch is both functional and durable providing a safe and reliable access solution to the roof.
When Do You Need A Roof Access Hatch?
Roof access hatches are essential in various scenarios, mainly in non-residential and residential buildings. Non-residential buildings such as hospitals, offices, and industrial units need roof access hatches to perform maintenance on the roof or rooftop installations like air conditioning systems, air treatment units, etc.
In the past, caged ladders were used to access roofs, which was not only risky but also resulted in long, strenuous vertical climbs from the ground floor.
However, the installation of a roof access hatch solves this problem by providing indoor access to the roof, bridging only one floor and reducing the climb to a maximum of 2.5 to 3 meters through the roof access hatch and a ladder or staircase.
On the other hand, roof access hatches in residential buildings serve a different purpose of providing access to rooftop terraces for leisure and relaxation. Glazed roof access hatches are commonly used in residential buildings, mainly apartments, for access to roof terraces.
These hatches provide natural light to the room underneath and make the space look more attractive and spacious, with easy access through a fixed staircase.
What Are The Different Types Of Roof Hatches?
Roof hatches are generally available in galvanized steel, aluminum, aluminum cover/galvanized steel curb or stainless steel finishes.
Galvanized Steel is typically finished with a white powder coat or a cool eco white water-based paint for added protection from the elements and increased durability. Other features of roof hatches available include fire ratings, insulated or non-insulated models, self-closing springs and quick action operating mechanisms.
Different types of roof hatches may also be used for different purposes such as accessing rooftop areas for repair or maintenance work, providing terrace access or ventilation purposes.
