Not only does this not work properly but you have just created an unsafe.
Air tight attic hatch.
An attic hatch can be a serious air leak.
Insulated attic hatch vs non insulated attic hatch thermal bridging analysis.
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.
We supply attic hatches that have been tested to stringent standards including passivhaus certification and offer the highest level of airtightness ensuring that your energy usage is not affected due to a poor fitting or draughty attic hatch.
Attic ladders and hatches our insulated airtight attic ladders provide convenient access to an attic without compromising a building s thermal performance.
For advice on which airtightness product is best for your project please contact us on 01484 461705.
Certified airtight and pre insulated attic door from wellhofer.
What follows then is a simple 10 step guide to building your own airtight attic access hatch for very little cost a few hours of your time easily available materials and.
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.
The image above shows an uninsulated airtight hatch and the impact on the loft insulation.
This one manufactured by battic door maintains the house s air barrier.
Unique design features also make them easier to install more reliable and more attractive than traditional attic ladders.
Installing an airtight attic hatch the right product and careful installation preserve the air barrier and save energy.
An attic hatch is usually located in a hallway or closet where the homeowners see it daily.
Even though attic hatches can be huge air leaks and sources of radiant heat loss they are rarely fixed.
My favorite ones are the ones with an attached ladder they install the foam between the ladder the hatch.
Having searched online for a simple design in the past i knew that there was literally not a single good article or resource on constructing a truly airtight attic hatch.
Why well the first big issue is if it is done properly you wouldn t be able to open it as it needs to be air tight.
Why an airtight loft hatch the at35 metal loft hatch is the first air tight loft hatch of its kind.
Wellhofer airtight attic hatch.
Insulated to meet part l of the building regulations the at35 is airtight in both positive and negative air pressures at 50pa.
Yet i mean once the homeowners fire up a blower door and whip out their infrared camera the problems with attic hatches are pretty obvious.
The hatch is available in several versions depending on the.
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.
The whole hatch is a thermal bridge with the situation at the junction with the ceiling a particularly weak point.
