Gas (en)

  • Thermal Insulation

    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

    TypeInsulating materialparticularities

    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

    Insulation material overview

    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,
    core insulation

    Perlite insulation panels: flat roofs,
    covering fills

    SLS 20

    0,035 W/(m·K)

    Exterior wall: Core insulation of double-skinned
    masonry,
    insulation behind clinker brick facades using
    the blown-in process

    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)


    Under-rafter insulation, not suitable for external insulation

    Hemp

    0,040-0,045 W/(m·K)

    Between rafter insulation,
    under rafter insulation

    Neptune ball fibres

    0,045 W/(m·K)

    Blown-in insulation for cavities, roofs,
    facades, interior and exterior insulation
    Context: 
    ID: 568

Technology

RSS