Roof

roof pitch

The interior and exterior structure remains the same
Sloping roof – insulation bag method
Roof pitch – blowing insulation material against the underlay
Above-rafter insulation with or without between-rafter insulation – from the outside
Re-insulating from the inside
Roof pitch extended downwards with under-rafter insulation
Doubling the roof pitch from the inside using rafter spreaders
The interior structure remains unchanged; the exterior is being refurbished
Double up the roof using rafter extenders
Insulation between rafters with rafter raising
Above-rafter insulation with or without between-rafter insulation

Drempel

Drempel – Insulating external walls and floors
Drempel – Insulating interior walls and floors
Drempel – Filling the cavity with foam

Flat roof

Ventilated flat roof
Ventilated flat roof – timber structure
Ventilated flat roof – concrete structure
Industrial roof – insulated from above using insulation boards
Industrial roof – insulated from below
Flat roof insulation – bungalow
Unventilated flat roof (warm roof)
unventilated flat roof (warm roof), solid construction

Upper floor slab

Solid ceiling

Solid ceiling – walkable insulation
Solid ceiling – insulation not accessible to foot traffic, tradespeople
Insulating a concrete floor (DIY)

timber-beamed ceiling

Without insert
Insulation that can be laid and inflated, suitable for walking on
Blown-in insulation in a timber-beamed ceiling
Timber-beamed ceiling with insulation on top – not accessible on foot

Nail binder

Timber ceiling (nailed truss construction)

Attic conversion

Floor hatch with built-in ladder (DIY)
Floor hatch with lid (DIY)

External wall

Façade

External insulation
External thermal insulation composite system (ETICS)
Insulating plaster
External wall insulation using cavity wall insulation units
Curtain wall
Internal insulation
Compact Spray-On Process
Internal insulation: studwork filled with blown-in insulation
Internal insulation using loose-fill insulation and lightweight concrete blocks
Internal insulation using insulation boards
Aerogel insulating plaster
Retrofitting core insulation
Retrofitting core insulation to double-shell masonry
Core insulation with ETICS
Retrofitting of masonry using PUR
Double-shell masonry with partial insulation
Retrofitting insulation to a concrete façade with rear-ventilated core insulation
Special components
Radiator recess (DIY)
Roller shutter box: insulating and sealing (DIY)
Roller shutter box, decommissioned and insulated (DIY)
Sealing off and insulating a radiator recess (DIY)
Insulating behind radiators (DIY)
Internal window reveal with anti-mould board (calcium silicate)

Partition joint in a house

Internal partition wall

cellar wall

Basement wall – perimeter insulation
Basement wall – internal insulation

Ground floor

Ground floor

Blowing out the timber joist floor
Thoroughly ventilate the crawl space
Crawl spaces treated from below using PU spray technology
Ground floor insulated from above

Cellar available

Basement floor insulation

cellar ceiling

Stairway to the cellar

Insulating the basement staircase

Solid ceiling

Concrete cellar ceiling – to be insulated on the underside with panels
Concrete cellar ceiling – blown in from below using a suspension system
Concrete cellar ceiling – polyurethane foam on the underside
Ground floor ceiling, with wooden joists on top, blown-in insulation

Cap ceiling

Suspended ceiling/cellar ceiling blown out from below
Ceiling/cellar ceiling without a cavity, with suspended ceiling

Timber joist floor/cavity

Special components

Service shafts – high-rise buildings (fire safety)
Pipe insulation (DIY)
Industrial roof – insulated from below
Industriedach von unten
Which insulation materials are used?
Existing condition

Many industrial roofs currently have inadequate or outdated insulation with high U-values. There may be visible damage and leaks. They are exposed to the elements and do not meet current standards. Urgent refurbishment and insulation work are required to improve energy efficiency and minimise heat loss. A professional assessment is recommended.

How is it insulated?

The insulation process for an industrial roof with insulation applied from below is carried out in several stages. First, the roof is thoroughly prepared, during which any damage and leaks are repaired. To this end, the roof is covered from above with a new bitumen membrane or sealed with liquid polymer. 

The trapezoidal roofs are then insulated from below using sprayed polyurethane insulation. This material conforms seamlessly to the trapezoidal sheets.

Insulation thickness

As a rule of thumb, the thickness of the insulation should be selected so as to achieve a U-value of 0.1 W/(m²K). This value is often regarded as the optimum for a roof’s thermal insulation and comfort.

Industriedach von unten gedämmt
Industriedach von unten gedämmt

All the benefits at a glance

Lower heating costs: Well-planned and effective roof insulation can generally lead to savings on heating costs of around 20% to 40% – based on the roof area – or even more. However, this figure is a rough estimate and may vary depending on the specific conditions of the building and the insulation.

Further benefits: 

  • Sound insulation: Reduction in external noise.
  • Fire protection: Slows the spread of fire.
  • Heat protection in summer: A more comfortable indoor climate.
  • Preservation of value: Extends the lifespan of the roof.
  • Environmental friendliness: Reduced energy consumption and CO₂ emissions.
  • Better working conditions: A more comfortable indoor climate for staff.

Financial support: If a U-value of 0.14 W/m²K or lower is achieved, this measure is eligible for a 15 per cent grant (or even 20 per cent upon presentation of an iSPF)

Can I install the insulation myself? No.