Allder Group - Glass and Locks

Allder Group - Glass & Locks

Residential - Replacement Windows & Doors


Over the last 20 years we have installed thousands of windows and doors. As a 24 hour emergency contractor we are often called out to the aftermath of a burglary. Clearly when someone has been unfortunate enough to be a victim of such a crime we need to do all we can to prevent a re-occurrence should they choose us to replace the frame for them.

We have carried out extensive market research and product testing and believe the Kommerling product to be far superior to others available. So confident in their locking system the manufacturer will pay £1000 compensation should anyone gain entry by jemmying open a fully locked window.

The windows are fully re-inforced and are fitted with high performance Argon cavity filled double glazed units creating a U value of 1.3 making them A rated.

They are available in standard white, and foil wrapped and grained in the following:

  • White ( RAL9010)
  • Cream (9001)
  • Black
  • Light oak
  • Irish Oak
  • Rosewood
  • Grey (7016)
  • Light Green (6019)
  • Dark Green (6009)

All these are available with white finish inside. Entrance doors are available in many different styles. Call us for a brochure or they can be viewed on

We are also now offering GRP windows. They look just like ALU clad from outside and they come in any colour, BRE 'A' rating, very low u-values and 25 year warranty. In addition we can supply and fit aluminium, steel or wooden windows and doors.

Traditional properties may benefit aesthetically choosing either aluminium or steel as they are more slim line. Even steel windows can be supplied double glazed these days, even powder coated in any RAL colour of your choice.

Whilst there are still wooden windows and doors available as "standard sizes" we do also have a joinery shop where we can manufacture bespoke products in either hardwood or softwood. We also have a spray shop facility so can paint in any RAL colour to a factory finish.

Aluminium windows can be viewed on


For the discerning customer, who wants to add more than just any new windows and doors to their home, there's the option of either the Kömmerling C70 or O70 door systems and there's a range of options for both inward and outward opening residential (front/back), French and even stable doors.

These specific door profiles have been designed and engineered with the same key features and benefits of the C70 and O70 systems.

Kömmerling Door System specification:

  • Option of chamfered (C70) or ovolo (O70) door frames, sashes and mullions
  • Residential door options - either high performance door panels or composite doors
  • Designed for high security applications
  • Handle colour options even remote locking
  • A number of glass options including safety glass