Hello everyone,
After this year’s hot summer, the topic of “summer thermal protection” has become increasingly important in our house planning. We were recommended a build with T10 bricks, as they are supposedly much better at providing summer thermal protection than the “newer” highly insulating hollow and solid bricks.
However, aside from this statement, I cannot find any real specifications. On the website of a relevant manufacturer, perlite-filled bricks are even advertised as having good summer thermal protection.
So, what is the truth here, and which type of brick would you choose regarding summer thermal protection?
Best regards,
ufr123
After this year’s hot summer, the topic of “summer thermal protection” has become increasingly important in our house planning. We were recommended a build with T10 bricks, as they are supposedly much better at providing summer thermal protection than the “newer” highly insulating hollow and solid bricks.
However, aside from this statement, I cannot find any real specifications. On the website of a relevant manufacturer, perlite-filled bricks are even advertised as having good summer thermal protection.
So, what is the truth here, and which type of brick would you choose regarding summer thermal protection?
Best regards,
ufr123
Well, then let me try to explain the principle:
Solid bricks are nowadays used as exterior wall materials mainly for decorative purposes (especially as facing bricks). For structural applications, if bricks are used, they are generally cellular bricks with chambers.
These chambers are always filled with something – if filled with air, they are called "unfilled," because this filling is easily changeable and equalizes with the surrounding air, including its temperature.
Chambers filled with "materials" provide a more consistent contrast to the properties of the brick webs – this alternating "stop and go" of heat flow through different materials creates a slowing effect, reducing heat transfer. The effect is stronger the greater the difference in properties (especially density) between the materials; and the more consistent the insulation effect, the more stable the properties of the filling material are – air filling is the most variable in this respect.
What I call "creme fillings" refer to foamed materials with granules embedded in the foam that maintain their position, whereas loosely poured granules tend to settle over time, reducing their density. However, this settling in the chambers of individual bricks only occurs up to the next bed joint, while blown-in insulation in an air cavity between two wall layers can settle more extensively over time. For this reason, blown-in insulation is typically used only for retrofitting, while for new construction, mat-shaped insulation fillings are preferred.
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https://www.linkedin.com/company/bauen-jetzt/
Solid bricks are nowadays used as exterior wall materials mainly for decorative purposes (especially as facing bricks). For structural applications, if bricks are used, they are generally cellular bricks with chambers.
These chambers are always filled with something – if filled with air, they are called "unfilled," because this filling is easily changeable and equalizes with the surrounding air, including its temperature.
Chambers filled with "materials" provide a more consistent contrast to the properties of the brick webs – this alternating "stop and go" of heat flow through different materials creates a slowing effect, reducing heat transfer. The effect is stronger the greater the difference in properties (especially density) between the materials; and the more consistent the insulation effect, the more stable the properties of the filling material are – air filling is the most variable in this respect.
What I call "creme fillings" refer to foamed materials with granules embedded in the foam that maintain their position, whereas loosely poured granules tend to settle over time, reducing their density. However, this settling in the chambers of individual bricks only occurs up to the next bed joint, while blown-in insulation in an air cavity between two wall layers can settle more extensively over time. For this reason, blown-in insulation is typically used only for retrofitting, while for new construction, mat-shaped insulation fillings are preferred.
https://www.instagram.com/11antgmxde/
https://www.linkedin.com/company/bauen-jetzt/
Most of the heat entering a house comes through the windows and especially the roof. The roof tiles play a rather minor role.
Since the thermal insulation value of unfilled tiles can be just as good as that of filled ones, it does not matter whether the tiles are filled or unfilled.
For the roof, the thermal phase shift plays a major role. For the tiles, it is less relevant.
Since the thermal insulation value of unfilled tiles can be just as good as that of filled ones, it does not matter whether the tiles are filled or unfilled.
For the roof, the thermal phase shift plays a major role. For the tiles, it is less relevant.
Filled blocks can be better than unfilled ones. That is the reason they exist.
However, the thermal transmittance (U-value) is the same measurement that keeps heat inside during winter and prevents heat from entering during summer. The mass and heat capacity of the different Poroton types are also very similar and therefore should not make a difference.
However, the thermal transmittance (U-value) is the same measurement that keeps heat inside during winter and prevents heat from entering during summer. The mass and heat capacity of the different Poroton types are also very similar and therefore should not make a difference.
Snowy36 schrieb:
I don’t quite understand your answer. That’s the nice thing about the internet: you can read more slowly than I write ;-)
Snowy36 schrieb:
Is air-filled then worse or better than, for example, perlite when it comes to thermal insulation? With air, the density difference between the brick web and the cavity is greater, but it varies.
Snowy36 schrieb:
What would be your suggestion to the original poster? I am explaining the principle neutrally so that everyone can draw their own conclusions.
And don’t forget: I have explained the principle generally for heat transfer; here it is specifically about protection against incoming heat. That’s why @Bookstar rightly points out that repelling heat entry is more effective than relying on quick heat dissipation. Especially since you can easily change tires between summer and winter, but you cannot change walls ;-)
https://www.instagram.com/11antgmxde/
https://www.linkedin.com/company/bauen-jetzt/
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