Trikåfabriken

The Building

Building pre-intervention

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Building pre-intervention: Malmo_Solution_avant_01.png

Building pre-intervention: Malmo_Solution_avant_02.png

Building post-intervention

This knitwear factory was built in early 20th century in Malmö. Knitted underwear for ladies was made there. It has been converted into a sustainable office building in 2022.

More Details

The Solution

Solution post-intervention

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What is the Solution?

The solution consists in replacing the inner sash of the box-type window with double glass.

Why Does it work?

The building is not listed, but it is subject to the chapter 8 of the Swedish Planning and Building Act (2010). This act mentions that "A building that is particularly valuable from a historical, cultural-historical, environmental or artistic point of view may not be defaced.". To preserve its façades, it was decided to only modify the interior side. The original exterior windows were maintained, while some of the inner were improved with new sashes including double glazing. As the inner windows were not original, it was not necessary to keep glazing bars.

PROS

Preservation of the historic window frames from the exterior, including profiles and proportions
Improvement of energy performance.
Improvement of airtightness.

CONS

Replacement of historic sashes

Window Type before retrofit

Box Type Window

Window glass type

Modern double glass

Window frame material

Wood

Window position

Inside

Shading

No shading.

Health issue

There is no real health issue in this case for the carpenters. The only risk is the rise of the moisture load, that can be easily controlled by opening windows or installing mechanical ventilation.

Technical drawings

Additional documentation

Installation Method

The windows were remove from the wall and restored by carpenters.

Moisture Management and Technical Compatibility

Moisture management has not been addressed in this restoration. Therefore, when the glass is replaced, less moisture will be able to condense on it, resulting in a higher moisture load in the room. This can be compensated for by installing mechanical ventilation to reduce the load. Another problem is the transfer of moisture in the box of this box-type window. However, as no sealant has been installed in the outer window, the moisture will be able to escape easily.

Airtightness

The airtightness was improved by replacing the inner sashes. This led to normal use of this historic window.