Building a fire wall in an interior wall for a wall-mounted stove

[lillespillevinken]

Hello,

I am currently in the planning stage for installing a fireplace. We have purchased a wall-mounted fireplace that weighs 80 kg, requiring it to be mounted on a wall that can withstand both the weight and the heat. The chimney to be installed weighs approximately 50-60 kg in total and will be supported in the attic.

Conditions:

• The fireplace should be placed in the middle of the interior wall in the living room. The current wall is 11 cm thick and is constructed with timber studs, with gypsum on one side and gypsum + OSB on the living room side.
• The wall stands on a concrete slab.
• The living room has parquet flooring (will be protected with a glass plate under the fireplace later).
• The fireproof wall must be ~120 cm wide.

My plan:

• Remove OSB + gypsum + any timber studs that are in the way on the living room side to create an opening exactly 120 cm wide. Keep the gypsum board on the other side so that it looks nice in the room on the other side of the wall.
• Build a wall using Leca blocks, measuring 15x19x59. The entire wall up to the ceiling. Reinforce horizontally.
• The newly built wall will then protrude approximately 5 cm into the living room, which could be a nice detail.
• Plaster / putty / tile the wall when it's finished, and then hang the fireplace.

Does this sound like a good plan? Have I missed anything?

Will the wall be able to support the weight of both the fireplace and the chimney?

Would it be smart to frame around the built wall and then screw the studs into the wall to increase stability? I thought it could function as some sort of expansion joint since I don’t have any concrete to build against on the sides.

How should one think about the parquet? The wall will protrude a bit over the floor, and since the current wall stands on a concrete slab, there will be a level difference there. I don’t want mortar on the parquet either, so this part of the wall almost needs to just rest on the floor. Maybe easiest to build up so the new wall is at the same height as the parquet and let the wall extend a bit just so it looks nice against the floor?

Grateful for all responses and feedback.

 

[lillespillevinken]

Forgot to add that the wall is ~240cm high.

 

[lillespillevinken]

I've reconsidered the parquet. It's probably best to just cut the parquet so that the wall stands on the slab everywhere, and then resolve the seam with a joint / strip / tile.