KCV B911, KCV B901 Uw1.0W/m2K


KCV B911, KCV B901 Uw1.0W/m2K

With conservation compliance, Dakea’s conservation roof windows are ideal for installations in conservation areas. They include a beautiful wooden frame that looks natural and simple to suit listed or heritage buildings. They’re affordable, provide good insulation and are highly effective.

Conservation roof window features:

  • Designed with conservation compliance, making them appropriate for conservation areas and heritage buildings.
  • An affordable roof window which doesn’t compromise on quality. Ideal for “small budget” projects.
  • A simple but efficient way to add light, ventilation and insulation in an attic room or loft conversion. Gain additional living space under one roof at an affordable cost.
  • Dakea Conservation is a center-pivot roof window construction, based on a solid wooden frame with two layers of varnish.
  • Available in natural or white-painted pine
  • Consists of a ventilation valve and a handle with two additional locking positions for passive ventilation. The window enables comfortable room ventilation to reduce the risk of condensation.
  • Dakea Conservation comes with an external black metal covering (RAL 9005).
  • Covered with a 20-year guarantee thanks to our commitment to excellent quality.
  • Dakea Conservation roof windows can be installed in all roofing materials, in a roof pitch between 15 to 90 degrees, recessed into slate.
  • Proper installation requires original Dakea flashing which is available for all common roofing materials including plain tiles.
  • It’s also available with black cladding and a glazing bar

If you’re looking for roof windows or rooflights, also known as skylights, then view our full range online.


Technical Specs

Thickness of glazing (mm) 24
Pane construction from inside (Resistance to snow load) 4-16-4H
Pane technical construction (for internal use) 4V6-16G1-4HV6
Thermal Transmittance glazing Ug (W/m²K) 1.0
DOP webpage Dakea
Reaction To Fire (Class) C-s1, d0
External Fire Performance -
Impact Resistance -
Load Bearing Capacity -
Noise reduction Rw (dB) 32 (-1;-5)
Thermal Transmittance window Uw (W/m²K) 1.3
Total solar energy transmittance 0.55
Light Transmittance (Tv) 0.79
NB Reaction to fire 1415
NB Thermal window 1390
NB Solartransmittance 0757
NB LightTransmittance 0757
NB All 0757, 1390, 1415
UV-transmittance 0.19


Colour External Black (RAL 9005)
Colour Internal Pine
Design Centre pivot
Easy-to-Clean coating No
Extra IFC free of charge No
Extra RUC free of charge No
Extra sound reducing foil No
Frame style Standard
Gas Argon
Handle Dakea-Pro (J2A)
Lacquering Two layers of water based lacquer
Low-E coatings 2
Material Product Wood
Pane Laminated No
Toughened external glass
Ventilation positions via handle 2
Ventilation Valve
Wood treatment Fungicide protection

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