ᐅ Floor insulation for a hobby room: thick foil insulation, vapor barrier?
Created on: 18 Apr 2016 17:00
R
RalfKHello everyone,
I have already read a lot in this forum and other sources, but I’m still not really sure how to properly carry out our project.
Background:
We have a balcony of about 35 m² (375 sq ft), under which there is currently an unfinished space that we want to convert into a wellness and fitness room (including a sauna). This space is currently enclosed on three sides. One side wall (uninsulated) borders our driveway, the second wall is the partition wall with the neighbor (between the two walls there is about 5 cm (2 inches) of mineral wool insulation). The third wall is essentially our basement exterior wall. The fourth side is currently open to the garden and is planned to be closed off with a window and a tilt-and-turn passage door. The floor consists of a roughly 12 to 15 cm (5 to 6 inches) thick layer of gravel (washed, grain size 32), above that a PE foil, and then 15 cm (6 inches) of reinforced concrete. The ceiling (towards the balcony) consists of 15 cm (6 inches) reinforced concrete with bitumen membranes on top (for waterproofing), then an EPDM membrane and a green roof with a small terrace area.
I would now like to insulate the floor and have the following thoughts:
1. Apply a Knauf Katja waterproofing membrane on the concrete floor, pulled up 10 cm (4 inches) on the sides with appropriate sealing strips, or would a thick PE foil be better?
2. 8 cm (3 inches) insulation (Styropor or Styrodur, or is there a better alternative?)
3. 18 mm (3/4 inch) OSB3 subfloor panels, glued together as a floating floor (or should it be thicker?)
4. PVC flooring
5. If this setup makes sense, does a vapor barrier still need to be installed? If so, probably between the OSB panel and the insulation...
The exterior wall facing our driveway should receive insulation boards (similar to external thermal insulation composite system / ETICS) either from the inside or outside. I also want to insulate the ceiling with 8 cm (3 inches) of insulation and cover it below with drywall. Here too, the question is whether to use a “rigid” insulation (Styropor / Styrodur etc.) or mineral wool with a vapor retarder?
Thank you very much for your information and tips,
Ralf
I have already read a lot in this forum and other sources, but I’m still not really sure how to properly carry out our project.
Background:
We have a balcony of about 35 m² (375 sq ft), under which there is currently an unfinished space that we want to convert into a wellness and fitness room (including a sauna). This space is currently enclosed on three sides. One side wall (uninsulated) borders our driveway, the second wall is the partition wall with the neighbor (between the two walls there is about 5 cm (2 inches) of mineral wool insulation). The third wall is essentially our basement exterior wall. The fourth side is currently open to the garden and is planned to be closed off with a window and a tilt-and-turn passage door. The floor consists of a roughly 12 to 15 cm (5 to 6 inches) thick layer of gravel (washed, grain size 32), above that a PE foil, and then 15 cm (6 inches) of reinforced concrete. The ceiling (towards the balcony) consists of 15 cm (6 inches) reinforced concrete with bitumen membranes on top (for waterproofing), then an EPDM membrane and a green roof with a small terrace area.
I would now like to insulate the floor and have the following thoughts:
1. Apply a Knauf Katja waterproofing membrane on the concrete floor, pulled up 10 cm (4 inches) on the sides with appropriate sealing strips, or would a thick PE foil be better?
2. 8 cm (3 inches) insulation (Styropor or Styrodur, or is there a better alternative?)
3. 18 mm (3/4 inch) OSB3 subfloor panels, glued together as a floating floor (or should it be thicker?)
4. PVC flooring
5. If this setup makes sense, does a vapor barrier still need to be installed? If so, probably between the OSB panel and the insulation...
The exterior wall facing our driveway should receive insulation boards (similar to external thermal insulation composite system / ETICS) either from the inside or outside. I also want to insulate the ceiling with 8 cm (3 inches) of insulation and cover it below with drywall. Here too, the question is whether to use a “rigid” insulation (Styropor / Styrodur etc.) or mineral wool with a vapor retarder?
Thank you very much for your information and tips,
Ralf
Similar topics