planning:thermal_protection:integrated_thermal_protection
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planning:thermal_protection:integrated_thermal_protection [2017/11/30 17:18] – [See also] kdreimane | planning:thermal_protection:integrated_thermal_protection [2019/01/31 11:04] – cblagojevic | ||
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What does this imply for the insulating building envelope? | What does this imply for the insulating building envelope? | ||
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==== Insulating materials ==== | ==== Insulating materials ==== | ||
- | Such low U-values can only be achieved with very well-insulating materials. | + | |
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+ | Such low U-values can only be achieved with very well-insulating materials. | ||
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The table graphically demonstrates that: | The table graphically demonstrates that: | ||
* Building envelope areas with reasonable component thicknesses are only possible if the insulating effect is mostly achieved with good insulating material. | * Building envelope areas with reasonable component thicknesses are only possible if the insulating effect is mostly achieved with good insulating material. | ||
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* All materials listed in the lower part of the table are ideal for this. Combined structures with other building materials are possible, and in some cases necessary: e.g. a concrete wall insulated on the outside, or a monolithic wall consisting of porous concrete and mineral foam insulation panels. The lower the thermal conductivity of the insulation material used is, the thinner the superstructures will be. | * All materials listed in the lower part of the table are ideal for this. Combined structures with other building materials are possible, and in some cases necessary: e.g. a concrete wall insulated on the outside, or a monolithic wall consisting of porous concrete and mineral foam insulation panels. The lower the thermal conductivity of the insulation material used is, the thinner the superstructures will be. | ||
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-> State of the art vacuum insulation materials allow for very slender, yet highly insulated, building elements.\\ | -> State of the art vacuum insulation materials allow for very slender, yet highly insulated, building elements.\\ | ||
-> “Semi-translucent envelopes" | -> “Semi-translucent envelopes" | ||
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- | |{{: | + | ---- |
- | |// | + | |
- | superstructures suitable for Passive Houses**// | + | |
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==== What about affordability? | ==== What about affordability? | ||
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The values for a typical wall of an old building, which is not even poorly insulated, are given in the first row. The occupants will spend about € 644 each year just to compensate for the heat losses through 100 m² of this wall. Applying insulation according to the Passive House standard, heat losses will decrease by a factor of 10; the annual costs for the energy loss through the external wall are reduced to less than 64 €/year. This means: | The values for a typical wall of an old building, which is not even poorly insulated, are given in the first row. The occupants will spend about € 644 each year just to compensate for the heat losses through 100 m² of this wall. Applying insulation according to the Passive House standard, heat losses will decrease by a factor of 10; the annual costs for the energy loss through the external wall are reduced to less than 64 €/year. This means: | ||
- | |€ 580 savings in heating costs every year!| | + | **€ 580 savings in heating costs every year!** |
What should be done in order to achieve these savings? | What should be done in order to achieve these savings? | ||
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//Our suggestion//: | //Our suggestion//: | ||
* Wait until it's time to repaint the external wall or repair the plaster – it won't be too long unless you’ve already just done it. The scaffolding and for painting the facade will end up costing you around € 2,500, an investment you will have to make anyways. | * Wait until it's time to repaint the external wall or repair the plaster – it won't be too long unless you’ve already just done it. The scaffolding and for painting the facade will end up costing you around € 2,500, an investment you will have to make anyways. | ||
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* Next, you should ask your bank for a mortgage loan which you can pay off in instalments of 580€/yr including interest and repayment, over a period of 20 years. | * Next, you should ask your bank for a mortgage loan which you can pay off in instalments of 580€/yr including interest and repayment, over a period of 20 years. | ||
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Existing Passive Houses illustrate that thicker layers of insulation required for conventional insulation materials can easily be realised: | Existing Passive Houses illustrate that thicker layers of insulation required for conventional insulation materials can easily be realised: | ||
* Most constructions provide **plenty of space for insulation**. | * Most constructions provide **plenty of space for insulation**. | ||
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* Thicker layers of insulation are easy to handle; applying them required hardly more effort than that needed for thinner layers, provided that it is applied properly. | * Thicker layers of insulation are easy to handle; applying them required hardly more effort than that needed for thinner layers, provided that it is applied properly. | ||
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* Passive-House-suitable components for building envelopes are available for **all types of constructions**. | * Passive-House-suitable components for building envelopes are available for **all types of constructions**. | ||
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* Measurements in completed Passive Houses have shown that the insulation effect of "thick insulation layers" | * Measurements in completed Passive Houses have shown that the insulation effect of "thick insulation layers" | ||
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- | > Due to the low heat losses, **interior surface stay at the same pleasant temperature year round** – even without heating surfaces in the components. | + | Due to the low heat losses, **interior surface stay at the same pleasant temperature year round** – even without heating surfaces in the components. |
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- | | {{ : | + | [{{ : |
- | |//**Thermography (infrared image) of the base point of a\\ | + | |
- | Passive House taken at the inside of an external wall\\ | + | |
- | Average surface temperature approx. 20°C\\ | + | In warmer climates or during summer months the interior surface temperature is also close to the indoor air temperature which means that it is lower than that of poorly insulated components which allow heat to be transported from the outside towards the inside. Highly insulated constructions have a **high temperature amplitude attenuation** reducing the temperature fluctuation of external building components, even with very small masses (e.g. double plaster board). |
- | Minimum temperature at the edge 19°C** | + | |
- | //|\\ | + | To a certain extent, highly insulated components mitigate any **remaining thermal bridges** compared with moderately insulated components – this is particularly important in [[planning: |
- | \\ | + | |
- | > In warmer climates or during summer months the interior surface temperature is also close to the indoor air temperature which means that it is lower than that of poorly insulated components which allow heat to be transported from the outside towards the inside. Highly insulated constructions have a **high temperature amplitude attenuation** reducing the temperature fluctuation of external building components, even with very small masses (e.g. double plaster board). | + | |
- | \\ | + | ---- |
- | > To a certain extent, highly insulated components mitigate any **remaining thermal bridges** compared with moderately insulated components – this is particularly important in [[planning: | + | |
===== See also ===== | ===== See also ===== | ||
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[[planning: | [[planning: | ||
- | [[planning: | + | [[planning: |
[[planning: | [[planning: | ||
- | [[planning: | + | [[planning: |
[[basics: | [[basics: | ||
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[[basics: | [[basics: | ||
- | [[phi_publications: | + | [[phi_publications: |
===== Multimedia ===== | ===== Multimedia ===== | ||
[[http:// | [[http:// |
planning/thermal_protection/integrated_thermal_protection.txt · Last modified: 2021/06/11 15:28 by nsukhija