ᐅ Recommended Wall Thickness and Insulation Types for Exterior Walls
Created on: 15 Jun 2012 14:09
T
TreskowHello,
recently we have started building our own house. That means we have a plot of land and are looking for a suitable house.
This week, we spoke with several construction companies. Regarding the exterior wall of a solid masonry house, we received different information: One company said that a 36cm (14 inch) Poroton brick with 2cm (0.8 inch) thermal insulation plaster meets the thermal insulation requirements. Another company told us it must be a 20cm (8 inch) Poroton brick with 10cm (4 inch) expanded polystyrene insulation.
We tend to prefer the 36cm (14 inch) Poroton brick with thermal insulation plaster, but the differing statements have left us uncertain.
What is better in terms of insulation values? What are the advantages and disadvantages of both options? How do the costs compare?
I wish everyone a great weekend and hope for some advice to help with our decision.
Angela
recently we have started building our own house. That means we have a plot of land and are looking for a suitable house.
This week, we spoke with several construction companies. Regarding the exterior wall of a solid masonry house, we received different information: One company said that a 36cm (14 inch) Poroton brick with 2cm (0.8 inch) thermal insulation plaster meets the thermal insulation requirements. Another company told us it must be a 20cm (8 inch) Poroton brick with 10cm (4 inch) expanded polystyrene insulation.
We tend to prefer the 36cm (14 inch) Poroton brick with thermal insulation plaster, but the differing statements have left us uncertain.
What is better in terms of insulation values? What are the advantages and disadvantages of both options? How do the costs compare?
I wish everyone a great weekend and hope for some advice to help with our decision.
Angela
Hello,
The economical reduction of transmission heat loss is closely related to the chosen heating system. With conventional heat generators, somewhat better insulation is usually necessary because consumption is higher than demand. With heat pumps, it is the opposite.
Thermal insulation plaster usually offers little benefit.
Best regards
Treskow schrieb:What is the main goal? Simply meeting the requirements, an economical overall concept, or maximizing subsidies?
...We are actually leaning more towards the 36cm (14 inch) Poroton brick with thermal insulation plaster, but due to the different statements, we are now confused.
The economical reduction of transmission heat loss is closely related to the chosen heating system. With conventional heat generators, somewhat better insulation is usually necessary because consumption is higher than demand. With heat pumps, it is the opposite.
Thermal insulation plaster usually offers little benefit.
Best regards
Hello Euro,
thank you for your quick reply. But I didn’t fully understand.
It wasn’t probably a good idea to mention our preferences. Basically, it’s not about maximum subsidies. And of course, we want an economical overall concept. But I wasn’t looking to discuss our concept; I wanted to know what experiences or knowledge other homebuilders have regarding the walls mentioned. However, if this is still relevant: we want to install underfloor heating with a gas condensing boiler and heat exchanger.
I’m looking forward to more responses.
Regards, Angela
P.S. This is my first time building, and I have to work my way through a variety of new terms and requirements. So please bear with me if I ask for simple, easy-to-understand explanations.
thank you for your quick reply. But I didn’t fully understand.
It wasn’t probably a good idea to mention our preferences. Basically, it’s not about maximum subsidies. And of course, we want an economical overall concept. But I wasn’t looking to discuss our concept; I wanted to know what experiences or knowledge other homebuilders have regarding the walls mentioned. However, if this is still relevant: we want to install underfloor heating with a gas condensing boiler and heat exchanger.
I’m looking forward to more responses.
Regards, Angela
P.S. This is my first time building, and I have to work my way through a variety of new terms and requirements. So please bear with me if I ask for simple, easy-to-understand explanations.
B
Bauexperte15 Jun 2012 21:33Hello Angela,
I am actually quite sure that you have mixed up what you heard a bit. It is either a 36.5 cm (14.4 inch) monolithic wall with 1 cm (0.4 inch) interior and 2 to 2.5 cm (0.8 to 1 inch) exterior plaster or 20 cm (8 inch) masonry with 14 or 16 cm (5.5 or 6.3 inch) ETICS (external thermal insulation composite system).
Kind regards
Treskow schrieb:
... One company said that a 36 cm (14 inch) Poroton brick with 2 cm (0.8 inch) thermal insulation plaster would meet the thermal insulation requirements. Another company told us it would have to be a 20 cm (8 inch) Poroton brick with 10 cm (4 inch) polystyrene insulation.
I am actually quite sure that you have mixed up what you heard a bit. It is either a 36.5 cm (14.4 inch) monolithic wall with 1 cm (0.4 inch) interior and 2 to 2.5 cm (0.8 to 1 inch) exterior plaster or 20 cm (8 inch) masonry with 14 or 16 cm (5.5 or 6.3 inch) ETICS (external thermal insulation composite system).
Kind regards
Hello,
Understanding the overall system is usually beyond the expertise of non-professionals. Even some so-called experts face significant challenges. The interactions and sometimes conflicting requirements between the building, climate location, user behavior, and system technology are very complex. Every construction project is specific and individual. What makes sense for one case can become a costly mistake in another.
Best regards
NB: Low heating costs already start with the choice of the building site!
Treskow schrieb:Here I would strongly recommend reconsidering.
.... But I didn’t want to discuss our concept, rather to know, .... We want to install underfloor heating with a gas condensing boiler and heat exchanger.
Understanding the overall system is usually beyond the expertise of non-professionals. Even some so-called experts face significant challenges. The interactions and sometimes conflicting requirements between the building, climate location, user behavior, and system technology are very complex. Every construction project is specific and individual. What makes sense for one case can become a costly mistake in another.
Best regards
NB: Low heating costs already start with the choice of the building site!
Bauexperte schrieb:
Hello Angela,
I am quite sure that you have mixed up the information a bit. Either 36.5 meters (120 feet) monolithic with 1 cm (0.4 inches) internal and 2 - 2.5 cm (0.8 - 1 inch) external plaster, or 20 cm (8 inches) masonry with 14 or 16 cm (5.5 or 6.3 inches) external thermal insulation composite system (ETICS)?
Kind regardsIt is quite possible that I mixed something up a bit. Your description is correct.
So, what are the advantages and disadvantages of these external walls?
Best regards