Hello, we are planning to build 2 small extra bedrooms in the basement. But how should we go about it in the simplest way?
As it stands now, we have two options.
1. Keep and repair the plastered walls and paint them. Lay down carpet (like deck carpet that still breathes). Put up a partition wall.

2. Install steel studs, build new interior walls + the partition wall.
Build a proper floor from scratch.

The problem is that the rooms are already small, Room 1. 1.80x3m Room 2. 2.50x3m. And a ceiling height of 210cm.
So, in principle, it feels like option 2 will take away too many cm of space. Even though it’s probably the option that feels most homey.

If one were to choose option 1, how would you easily repair the holes in the plastered wall? Preferably something that doesn’t take several weeks to dry:) anything to keep in mind?
 
What type of house is it? Year of construction? Type of slab? Type of drainage? What type of soil is the house built on?
 
Option 1. The holes are best repaired with a similar plaster to what you currently have. I think the floor is best with tiles. Plaster takes weeks to months to dry.

Ensure there is good ventilation and review the drainage. Many basements may be unsuitable for living space.
 
H Hammarfall said:
Option 1. The holes are best repaired with similar plaster as you have now. I think the floor is best with tiles. Plaster takes weeks - months before it dries.

Make sure there is good ventilation and review the drainage. Many basements may be unsuitable as living space.
Depending on when the house was built and how, it determines which plaster should be used, and the choice of flooring depends on how the floor is constructed.
 
O Exsicco said:
Depending on when the house is built and how determines which plaster should be used, and the choice of flooring depends on how the floor is constructed.
That's right, more information is needed.
 
I have excavated our basement down to the bottom of the foundation, then built up with 100mm pordrän, 50mm cellplast, and on top of that about 80mm of reinforced concrete with water pipes. Our house was built in '44, so it was unreinforced concrete directly on the clay (old lakebed). After that, I framed up with 45mm metal studs (air gap against exterior walls) and moisture-resistant drywall against walls standing directly on the clay. The interior walls are OSB + regular drywall. For ventilation, I have installed an FTX system. It's an enormous job and costly, but in Stockholm, you can at least justify it given the average cost per m2 :) we now have a fantastic climate in the basement where there will be two bedrooms, a laundry room, a bathroom, and a wine cellar... oh yes, we also raised the house by about 30cm, which gives us a ceiling height of 235cm when everything is finished. I would not recommend anyone to undertake a similar project unless the person in question has more energy than sense...
 
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