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)
Sealing off and insulating a radiator recess (DIY)
Existing condition

In many buildings, old radiators have been installed in recesses. The walls are particularly thin in these areas, allowing a great deal of heat to escape.

Radiator recesses often have the following characteristics:

  1. Thermal bridges: Due to the lack of insulation, radiator recesses act as thermal bridges, which can lead to condensation and mould growth.
  2. Heat loss: The uninsulated radiator recesses result in significant heat loss
  3. Uncomfortable indoor climate: The cold surfaces of the radiator recesses can create unpleasant draughts, particularly near the radiators.
  4. Risk of mould: The combination of thermal bridges and damp promotes mould growth.
How is it insulated?

If new radiators are being installed ‘anyway’ (for example, when old ribbed radiators are being replaced with modern flat radiators), the radiator recess can be insulated.

The individual steps:

  1. The old radiator is removed (this work should be carried out by a specialist heating contractor)
  2. The radiator recess is sealed with a wood-based panel. A mat or loose-fill insulation material should be installed in the resulting cavity. Alternatively, the newly created cavities can also be filled with fibrous blow-in insulation by a specialist insulation contractor.
  3. The wood-based panel is covered on the room side with a gypsum board, onto which wallpaper, plaster or similar finishes are then applied.
  4. The heating engineer then installs the new, flat compact radiators
Insulation thickness

The thickness of the insulation depends on the cavity to be filled, which is created by removing the radiator.

Heizkörpernische dämmen
Heizkörpernische dämmen

All the benefits at a glance

Financial support: This energy-saving measure is only eligible for funding under the BEG scheme if carried out in conjunction with external wall insulation or internal wall insulation. There must be sufficient floor space available for the new radiators.

Can I install the insulation myself? Yes. If the newly created cavities are to be insulated with fibrous blow-in insulation materials, a suitable specialist contractor must be commissioned.

Insulation materials: Mineral wool, all types of blow-in insulation

Further information