Hello,
I have a question:
My house currently has an electric underfloor heating system installed on the ground floor, first floor, and attic in all rooms. I am planning to install a heat pump and retrofit water pipes by milling channels into the screed.
According to the building documentation, there is already insulation beneath the screed. Now I wonder if it makes sense to completely remove the screed on the ground floor, install new impact sound insulation and thermal insulation, and then lay a new screed. The terraced house was built in 1990.
For the first floor and attic, I plan to only mill the water pipes into the existing screed. Would you recommend also removing the screed on the ground floor, or is it sufficient there to just mill the pipes as well?
Best regards
I have a question:
My house currently has an electric underfloor heating system installed on the ground floor, first floor, and attic in all rooms. I am planning to install a heat pump and retrofit water pipes by milling channels into the screed.
According to the building documentation, there is already insulation beneath the screed. Now I wonder if it makes sense to completely remove the screed on the ground floor, install new impact sound insulation and thermal insulation, and then lay a new screed. The terraced house was built in 1990.
For the first floor and attic, I plan to only mill the water pipes into the existing screed. Would you recommend also removing the screed on the ground floor, or is it sufficient there to just mill the pipes as well?
Best regards
N
nordanney29 Sep 2024 10:10asaid10 schrieb:
Is it enough if I only do this on the ground floor? Or should I also remove the screed on the upper floor and attic?You only need to insulate against the slab and the ground on the ground floor.You can also do it upstairs, but this is mainly because with a conventional underfloor heating installation, you need to maintain much smaller spacing than with milled channels. From an insulation point of view, it is less important, since there is also a warm ground floor beneath the heated upper floor.
Have you had a professional room-by-room heating load calculation and the underfloor heating installation planned based on your specifications, for example regarding the desired room temperature or the supply/return temperature of the heat pump? If not, that should be the first step anyway (for example, from the engineering office Heckmann).
N
nordanney29 Sep 2024 19:02asaid10 schrieb:
I’m thinking of completely removing and re-insulating the screed only on the ground floor. Or would it be enough to just mill this layer? If you want to install a heat pump, I WOULD remove the screed everywhere (sledgehammer, two friends, one Saturday) and rebuild everything to get proper installation heights.
Once again: has everything already been calculated and planned by a professional?
Yes, I have a heating load calculation that shows a total heating load of 8303 W.
I told the heating installer that I plan to mill (install underfloor heating) and he also designed a Vaillant 7.5 kW system. This is because I am also replacing the windows and front door.
However, I am now considering removing the screed and installing new insulation on the ground floor.
For cost reasons, I would still mill on the upper and attic floors since it is easier, and insulation is less important there. The company also mentioned that they could mill with a pipe spacing of 10cm (4 inches).
I told the heating installer that I plan to mill (install underfloor heating) and he also designed a Vaillant 7.5 kW system. This is because I am also replacing the windows and front door.
However, I am now considering removing the screed and installing new insulation on the ground floor.
For cost reasons, I would still mill on the upper and attic floors since it is easier, and insulation is less important there. The company also mentioned that they could mill with a pipe spacing of 10cm (4 inches).
So, I’ve now completely removed the screed on the ground floor. It turned out to be faster and easier than expected. I would just like to know exactly how the new insulation layers should be built up.
I have WLG 024 6cm (2.4 inches) foil-faced PUR insulation, with a grid foil on top.
But shouldn’t I also include an impact sound insulation layer?
I have WLG 024 6cm (2.4 inches) foil-faced PUR insulation, with a grid foil on top.
But shouldn’t I also include an impact sound insulation layer?
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