Air Tight Attic Hatch

Independent airtightness sealing system which seals the hatch frame to the surrounding timber joists noggins or the adjacent airtightness and vapour control layer.

Air tight attic hatch.

How to insulate and air seal an attic access hatch air seal the trim the first step is air sealing the finish trim and enclosure around the attic hatch. Our attic hatches include an independent airtightness sealing system which seals the frame to the surrounding timber joists noggins or adjacent airtightness and. If not insulated and air sealed properly attic hatches can represent the single largest source of heat loss in a home. Here are the readily available materials and simple techniques that the author uses to construct an attractive airtight and well insulated attic access.

To achieve this the design creates an effective seal that has been tested against aging which is maintained by means of a pre stressed spring which ensures the door remains airtight it is also important to ensure that the frame around the attic hatch is sufficiently sealed for airtightness as well as the hatch door itself. This hatch is designed specifically to meet the stringent demands new properties are subjected to ensure they are as airtight and well insulated as possible. An attic hatch can be a serious air leak. A wellhöfer airtight insulated attic hatch can be fitted in the ceiling of an airtight newbuild or refurbishment retrofit to prevent heat loss through the roof space and eliminate air leaks.

As loft or roof space access requires a large hole in the insulation and airtight layer of a building the attic hatch is critical to the effectiveness of the building s insulation and airtightness layer. Triple gaskets provide an air tight seal. In our ongoing series on air sealing we are going to focus on the dreaded attic hatch or as allison baile s of energy vanguard so eloquently calls it a mind blowing hole in your building envelope instead of crunching the numbers as he did one just needs to walk by one in a hallway during the middle of summer to know it isn t insulated. This is generally about a 22 by 30 hole in the ceiling of your house into unconditioned space so it certainly deserves some consideration.

There are hundreds of things to detail properly to achieve an airtight home but one of the most commonly overlooked in a typical new house is the attic access hatch. The hatch is available in several versions depending on the required amount of insulation in the attic. Insulated to meet part l of the building regulations the at35 is airtight in both positive and negative air pressures at 50pa. The at35 metal loft hatch is the first air tight loft hatch of its kind.

This one manufactured by battic door maintains the house s air barrier. Carefully pull down the finish trim.