Today, we have an old Skåne-length house with three walls. First, two old brick walls with an air space and inside these, a layer of lightweight concrete blocks.
I am currently fixing the old ventilation holes on the outside of the house. Some of these are filled with mortar, debris, etc. I notice that some ventilation holes only go to the first air space, just as the house was when it was built in 1910, while a few go through the inner brick wall, so they also ventilate the space between the bricks and lightweight concrete blocks.
The house is 27 m long, and there are 5-7 ventilation holes per side.
Should all go to the inner space, or is it enough with just a few? Does any need to go to the inner air space? Cold air can also blow in this way and cool the wall.
I am currently fixing the old ventilation holes on the outside of the house. Some of these are filled with mortar, debris, etc. I notice that some ventilation holes only go to the first air space, just as the house was when it was built in 1910, while a few go through the inner brick wall, so they also ventilate the space between the bricks and lightweight concrete blocks.
The house is 27 m long, and there are 5-7 ventilation holes per side.
Should all go to the inner space, or is it enough with just a few? Does any need to go to the inner air space? Cold air can also blow in this way and cool the wall.
Oki is on the same track. The problem with a cooled inner wall should probably not be that big. Better to ensure good ventilation of the air gaps that exist.
Ventilating the air gap may not always be entirely correct; stagnant air is a reasonably good insulator, while moving air will vent out the heat that leaks out and thus provide no insulation.
I could also imagine that when ventilating the air gap, cold air comes in, causing the moisture in the outer wall to freeze, leading to cracks.
D
I could also imagine that when ventilating the air gap, cold air comes in, causing the moisture in the outer wall to freeze, leading to cracks.
D