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uPVC Bay or Bow windows


  • Delivery in approx. 7-10 working days*

  • Compliant with Document 'L' (Part 'L') of Building Regulations

  • Internally Beaded

    = Security & Ease of Installation
  • 5 Chamber System

    = Strength & Thermal Efficiency
  • Planibel 'A' Glass

    = High Thermal Efficiency
  • 28mm Double Glazing

    = incorporating Warm Edge Spacer Bars = Sound Insulation & Excellent Thermal insulation properties
  • 70mm Profile Thickness

    = Ease of Installation
  • Key Locking Handles

    = Security
  • Bay Windows:

    supplied with Load Bearing Poles. Jacking Points and Head Plates available for a small charge, if requested.
  • Bow Windows:

    = External Trims
  • 10 Year Guarantee

    (Please see our Terms and Conditions)
  • Windows and Doors Installation Instruction Windows and Doors Installation Instruction
Installation of Bay and Bow windows is a complicated procedure and should only be attempted by somebody with extensive knowledge of the practises required to install such an item.

* Dear Customer,

Due to the complexities of Bays and Bows, all submissions will be checked by our estimating department for correctness of details and costing.
Reasons to buy
Dunster House
Windows and
Locking -

"Mushroom head"
bolts for security.
5 Chamber System -
Internal chambers make it
harder for warm air to
Low Level Gasket
seals -
Less visible
and look neater.
100% Virgin uPVC -
So will not discolour
over time.
Fully Welded -
Provides a more
attractive finish.
Other Dunster House Products