Intensive core insulation

In times of rising raw material and energy prices, modern windows help to noticeably reduce heating costs. This means that building owners and renovators can look forward to further price increases for heating oil or gas with peace of mind. Because the intensive core insulation IKD® is a decisive step towards optimising the thermal insulation properties of windows. This means that you can already meet tomorrow's state thermal insulation requirements today.

Benefits for window construction

Reduced workload

Outstanding heat insulation no longer requires fitting the profiles with inserts by hand. The profiles are supplied pre-filled with foam.

No additional investment

The foam is injected into the profile chamber in the extrusion plant. The window manufacturer then receives the finished foam-filled profile off the shelf.

Easy recycling

The foam is kept in place inside the profile by pressure and not surface bonding. When the window sections are cut into pieces, the foam falls out of the profile and can be recycled separately.

Increased heat insulation

Sash profiles with IKD® technology can achieve Uf values of < 0.89 W/(m²K) when used in combination with STV® static dry glazing.

No steel stiffening elements

When used together with STV® technology, standard element sizes do not need steel stiffening elements. This saves weight, reduces transportation costs and makes installation easier.

Normal production process

The profiles can be cut, heat sealed and finished as normal.

Windows in a class of their own

IKD®: GEALAN's pioneering role


 GEALAN is a pioneer in factory foam filling of profiles and launched the first foam-filled   window and accessory profiles back in 2010.

Knowledge born of experience

Today GEALAN has a wealth of expertise in how to incorporate this technology into profile production.

Further benefits

  • The profiles are foam-filled in the factory for GEALAN customers.
  • No additional investment is required on the part of the fabricator.
  • No changes required to the customer's production process.
  • IKD® profiles can be recycled.

Systematic use

GEALAN uses IKD® foam technology in a targeted manner in various systems, products and new developments to increase the heat insulation.


For the first time, GEALAN's IKD® intensive core insulation offers window manufacturers an efficient and economic way of producing windows that satisfy the highest demands in terms of heat insulation.


IKD® intensive core insulation does not require any investment in new machines. The foam is injected into the profile chamber in the extrusion plant.

The window manufacturer then receives the finished foam-filled profile off the shelf. Watch our film about window production with IKD®.
Are you looking for window manufacturers in your area?

Use our manufacturer locator.


Talk to us


The GEALAN ACADEMY offers market-oriented seminars on topics like construction law, sales and window technology.

Do not miss any news!

I want to receive newsletter "Reference Building of the Month" and GEALAN news via E-Mail (approx. twice a month) - free of charge and terminable at any time.


The GEALAN corporate group is of Europe's leading manufacturers of vinyl profiles for windows and doors.

©2024 GEALAN Fenster-Systeme GmbH