E
erbsendorf4 Dec 2011 18:42Hello everyone,
we are planning a KfW 70 single-family house of about 140sqm (1507 sq ft) without a basement. Various construction companies have given us quotes, and now we are uncertain which material to use for the roof insulation in the exposed rafter roof structure.
The options are expanded polystyrene (EPS) or blown-in insulation Isofloc.
Which material would you choose and why?
Thank you
Klaus
we are planning a KfW 70 single-family house of about 140sqm (1507 sq ft) without a basement. Various construction companies have given us quotes, and now we are uncertain which material to use for the roof insulation in the exposed rafter roof structure.
The options are expanded polystyrene (EPS) or blown-in insulation Isofloc.
Which material would you choose and why?
Thank you
Klaus
B
Bauexperte4 Dec 2011 22:10Hello Klaus,
Neither of those...
Mineral wool has very positive insulation and handling properties, is resistant to moisture and aging, and also meets fire protection requirements. Its production is not very sustainable, but the energy balance becomes positive after a short period. Health risks are minimized by strict legal regulations and the use of protective workwear.
Properties:
Mineral wool is an insulating material with very low thermal conductivity. With sufficiently thick thermal insulation, the energy demand of a building—whether for heating in winter or cooling in summer—can be significantly reduced.
Mineral wool is easy to install and stands out due to good material characteristics and versatile applications. It protects against heat and cold, insulates sound, and is resistant to mold, rot, and pests. Compared to other insulation materials, mineral wool is aging-resistant and relatively easy to handle economically.
Stone wool additionally provides good fire protection, as it has a high melting point, is non-combustible, and does not release toxic smoke gases. Because melting of glass wool during a fire can significantly impact, for example, the load-bearing capacity, stone wool is often required for structural verification.
The environmental footprint of mineral wool is not optimal because of its nearly non-renewable raw materials, generation of fiber dust during processing, and poor recyclability. The production of stone wool also requires a lot of energy (due to high melting temperatures). Additionally, stone wool’s high bulk density leads to greater dead load on the overall structure (roof, wall) and disadvantages in transportation. Nevertheless, mineral wool has a positive energy and emissions balance. The energy required for production is recovered within a few months through its use as thermal insulation; the energy balance evens out after a few weeks.
.... continuation on the DENA page
Source: German Energy Agency
Kind regards
erbsendorf schrieb:
We are planning a single-family house, KFW70 standard, about 140sqm (1506 sq ft) without a basement. Several construction companies have given us offers, and now we are unsure which material we should use for roof insulation under the exposed roof structure. Our options are polystyrene or blown-in insulation, isofloc. Which material would you use and why?
Neither of those...
Mineral wool has very positive insulation and handling properties, is resistant to moisture and aging, and also meets fire protection requirements. Its production is not very sustainable, but the energy balance becomes positive after a short period. Health risks are minimized by strict legal regulations and the use of protective workwear.
Properties:
Mineral wool is an insulating material with very low thermal conductivity. With sufficiently thick thermal insulation, the energy demand of a building—whether for heating in winter or cooling in summer—can be significantly reduced.
Mineral wool is easy to install and stands out due to good material characteristics and versatile applications. It protects against heat and cold, insulates sound, and is resistant to mold, rot, and pests. Compared to other insulation materials, mineral wool is aging-resistant and relatively easy to handle economically.
Stone wool additionally provides good fire protection, as it has a high melting point, is non-combustible, and does not release toxic smoke gases. Because melting of glass wool during a fire can significantly impact, for example, the load-bearing capacity, stone wool is often required for structural verification.
The environmental footprint of mineral wool is not optimal because of its nearly non-renewable raw materials, generation of fiber dust during processing, and poor recyclability. The production of stone wool also requires a lot of energy (due to high melting temperatures). Additionally, stone wool’s high bulk density leads to greater dead load on the overall structure (roof, wall) and disadvantages in transportation. Nevertheless, mineral wool has a positive energy and emissions balance. The energy required for production is recovered within a few months through its use as thermal insulation; the energy balance evens out after a few weeks.
.... continuation on the DENA page
Source: German Energy Agency
Kind regards
erbsendorf schrieb:
...Which material would you use.... Stone wool, wood fiber! Besides the winter thermal insulation (energy saving regulations/building codes), summer thermal protection is becoming increasingly important!Best regards
E
erbsendorf6 Dec 2011 18:51Thank you for your clear answers regarding mineral wool and wood wool.
Could you provide me with information about blown-in insulation materials like isofloc, etc.?
I have appointments with different builders in the coming days and would like to have arguments ready for my discussions.
These are small builders who will likely accommodate my preferences.
In our area, blown-in insulation is currently used a lot in private new builds, but since no one has much experience here, information would be very helpful for me.
Could you provide me with information about blown-in insulation materials like isofloc, etc.?
I have appointments with different builders in the coming days and would like to have arguments ready for my discussions.
These are small builders who will likely accommodate my preferences.
In our area, blown-in insulation is currently used a lot in private new builds, but since no one has much experience here, information would be very helpful for me.
A
ansgarm746 Dec 2011 20:36Hello,
we are currently building a house with natural insulation materials, meaning the internal insulation consists of hemp mats. Advantages:
- natural material
- easy to work with
- manufacturer HOCK Dämmstoffe from Nördlingen
The rest of the insulation was blown in and consists of wood chips coated with clay.
The insulation performance is really good, almost too warm.
Best regards
A. Müller-Wissmann
we are currently building a house with natural insulation materials, meaning the internal insulation consists of hemp mats. Advantages:
- natural material
- easy to work with
- manufacturer HOCK Dämmstoffe from Nördlingen
The rest of the insulation was blown in and consists of wood chips coated with clay.
The insulation performance is really good, almost too warm.
Best regards
A. Müller-Wissmann
Similar topics