Borgmann Aquaponics Hydroponics
Insulation materials at a glance
Context : Insulating the greenhouse can significantly reduce energy consumption. An overview of this.
All prices are based on a required heat transfer coefficient (U-value) of 0.24 watts per square meter and Kelvin. Its implementation is required by the Building Energy Act (GEG) , which, among other things, replaced the Energy Saving Ordinance (EnEV) at the end of 2020.
See also article: Thermal insulation overview
| Type | Insulating material | particularities |
Heat protection | Price, net (as of 2022) |
|---|---|---|---|---|
| Organic | Flax | Resistance to rot | bad | ca. 20 €/m 2 (17 cm) |
| Hemp (mat/plate) | Resistant to moisture and rot | bad | 33 - 53 €/m2 (18 cm / 19 cm) | |
| Wood fiber | High heat capacity | good | 8* - 20 €/m2 (ab 4 cm* / 16 cm) | |
| Wood wool | Resistance to vermin, rot and fungal attack | good | €222/m 2 (34 cm) | |
| Jute | Pollutant-free and biodegradable | good | €21/m 2 (15 cm) | |
| Coconut Fiber | Particularly break-resistant, a very good alternative to synthetic insulation materials | medium | €45/m 2 (18 cm) | |
| Cork | Open to diffusion, very pressure-resistant | medium - good | €117/m 2 (18 cm) | |
| Sheep wool | Particularly open to diffusion, cleans room air | good | €25/m 2 (16 cm) | |
| Reed | Resistance to rot and moisture | bad | €111/m 2 (27 cm) | |
| Seagras | High moisture resistance, resistant to mites, mice and other vermin | good | €20/m 2 (19 cm) | |
| Straw | Open to diffusion | good |
8 - 16* €/m2 (18 cm / ab 4 cm*) |
|
| Cellulose | Moisture regulating, mold resistant | good | €8/m 2 (16 cm) | |
| Mineral | Expanded Clay | Non-flammable, resistant to moisture and frost, good sound insulation | good | 25,00* €/m2 (ab 4 cm* / 72 cm) |
| Calciumsilikat | Highest fire protection class, alkaline properties prevent mold | medium | €366/m 2 (24 cm) | |
| Glass wool (matte) | Non-flammable, resistant to mold and vermin | medium | 10 - 25 €/m2 (24 cm / ab 4 cm*) | |
| Mineral foam | Dimensionally stable, pressure-resistant, non-flammable | good | €66/m 2 (20 cm) | |
| Perlite | Water-repellent, bug-resistant, will not rot | good | €40/m 2 (20 cm) | |
| Foam glass | Poor soundproofing, no malleability | medium | €136/m 2 (16 cm) | |
| Rock wool (mat, soft) | Non-flammable, resistant to mold and vermin | medium | 16* - €38/m 2 (14 cm) | |
| Synthetic | Extruded polystyrene (XPS) | Insensitive to water, tread-resistant, highly flammable | good | €30/m 2 (14 cm) |
| Expanded polystyrene (EPS) | High moisture resistance | good | 12 - 19 €/m2 (14 cm / ab 4 cm*) | |
| Polyurethane (PUR) | Elastic | good | €26/m 2 (10 cm) | |
| Polyisocyanurate rigid foam (PIR) | Weather-resistant, water-repellent, pressure-resistant | good | €96/m 2 (19 cm) |
Source: IpeG Institute. *= blown-in insulation; Material thickness depends on the cavity, but at least 4 cm.
Overview of insulation effect
Photo: Research Institute for Thermal Insulation eV
|
Insulating material |
Thermal conductivity |
Application |
|
Glass wool |
0,030-0,040 W/(m·K) |
Roof: insulation between rafters Ceiling: impact sound insulation Wall: ETICS, rear-ventilated insulation |
|
Rock wool |
0,030-0,040 W/(m·K) |
Roof, facade, screed |
|
Foam glass |
0,036–0,060 W/(m·K) |
Flat roof, facade, interior insulation |
|
Perlite |
0,038 – 0,050 W/(m·K) |
Expanded perlite: insulation between rafters, Perlite insulation panels: flat roofs, |
|
SLS 20 |
0,035 W/(m·K) |
Exterior wall: Core insulation of double-skinned |
|
Calcium silicate |
0,053–0,07 W/(m·K) |
Internal insulation |
|
EPS |
0,035-0,040 W/(m·K) |
Screed, facade (ETICS), flat roofs |
|
PUR rigid foam |
0,025-0,030 W/(m·K) |
Flat roof, pitched roof (over-rafter insulation) |
| XPS | 0,030-0,040 W/(m·K) | Perimeter insulation, foundation, facade (ETICS), |
|
Wood fibers |
0,040-0,055 W/(m·K) |
lightweight constructions, in connection with fills, Roof, screed, ETICS |
|
Wood wool |
0,090 W/(m·K) |
Plaster base, summer heat protection, cladding |
|
Cork |
0,045 W/(m·K) |
|
|
Cellulose |
0,040 W/(m·K) |
Between rafter insulation Wooden frame construction Wall/ceiling surfaces |
|
Flax |
0,040 W/(m·K) |
|
|
Hemp |
0,040-0,045 W/(m·K) |
Between rafter insulation, |
|
Neptune ball fibres |
0,045 W/(m·K) |
Blown-in insulation for cavities, roofs, |
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