ᐅ Insulating and sealing radiator recess for new underfloor heating installation
Created on: 10 Aug 2017 17:12
S
Smutje1Hello everyone,
We are renovating a solid 1970s house, have removed the radiators, and are installing underfloor heating throughout the entire house. There are two old radiator recesses that we want to close off.
The exterior wall consists of:
24 cm (9.5 inches) pumice concrete
2 cm (0.8 inches) expanded polystyrene (EPS)
5.5 cm (2.2 inches) brick veneer
However, the heating recesses consist only of:
3 cm (1.2 inches) Heraklith board
0.5 cm (0.2 inches) expanded polystyrene (EPS)
5.5 cm (2.2 inches) brick veneer.
As far as we can tell, there isn’t even EPS insulation between them.
Our questions: How should we insulate and close these recesses without causing moisture problems inside the house? And is it advisable to over-insulate the recess? According to a U-value calculator, the exterior wall has a U-value of 0.48. Using modern insulation, this U-value would improve quite significantly.
The two recesses are 19 and 20 cm (7.5 and 7.9 inches) deep, 1.49 m (4 ft 11 in) wide, and 89 cm (2 ft 11 in) high.
We have found many solutions online for closing radiator recesses, but they all emphasize that moisture problems can be avoided by installing a new radiator. In our case, this will not apply. Additionally, a kitchen unit will be installed in front of one of the recesses.
I would really appreciate professional advice.
Thank you very much in advance!
Smutje
We are renovating a solid 1970s house, have removed the radiators, and are installing underfloor heating throughout the entire house. There are two old radiator recesses that we want to close off.
The exterior wall consists of:
24 cm (9.5 inches) pumice concrete
2 cm (0.8 inches) expanded polystyrene (EPS)
5.5 cm (2.2 inches) brick veneer
However, the heating recesses consist only of:
3 cm (1.2 inches) Heraklith board
0.5 cm (0.2 inches) expanded polystyrene (EPS)
5.5 cm (2.2 inches) brick veneer.
As far as we can tell, there isn’t even EPS insulation between them.
Our questions: How should we insulate and close these recesses without causing moisture problems inside the house? And is it advisable to over-insulate the recess? According to a U-value calculator, the exterior wall has a U-value of 0.48. Using modern insulation, this U-value would improve quite significantly.
The two recesses are 19 and 20 cm (7.5 and 7.9 inches) deep, 1.49 m (4 ft 11 in) wide, and 89 cm (2 ft 11 in) high.
We have found many solutions online for closing radiator recesses, but they all emphasize that moisture problems can be avoided by installing a new radiator. In our case, this will not apply. Additionally, a kitchen unit will be installed in front of one of the recesses.
I would really appreciate professional advice.
Thank you very much in advance!
Smutje
A moisture problem arises when the dew point is shifted into the masonry by internal insulation. However, obviously you don’t have masonry. Which I find a bit odd. Often there was then a half brick. But anyway: Just get aerated concrete blocks from the hardware store. Use the appropriate adhesive. Simply build the wall, plaster it, and that should be fine. Nothing should happen then.
Thank you for the quick response. Yes, there are many odd things about this house...
So, we shouldn’t add any more insulation? Not even the 2cm (1 inch) polystyrene outside the wall? Or will that cause exactly the issue with the dew point (I’m not familiar with this term yet, so I need to learn more) if insulation is applied within the Heraklith board?
So, we shouldn’t add any more insulation? Not even the 2cm (1 inch) polystyrene outside the wall? Or will that cause exactly the issue with the dew point (I’m not familiar with this term yet, so I need to learn more) if insulation is applied within the Heraklith board?
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