Royal Putty Line Windows

Our slimmest aluminium steel replacement window The Royal Putty-Line, designed and manufactured to replicate the Steel windows of yesteryear with a 45° putty line detail on the window sashes. Almost identical in looks to the original steel windows it is hard to tell them apart, with many benefits over the original including enhanced security, thermally broken frame and Krypton gas filled sealed double glazed units, exceeding building regulations for new builds and renovation projects alike.

Our Royal Putty-Line windows offer a huge improvement over steel in terms of thermal performance corrosion resistance and security. A perfect replacement option that are simple to replace and cost much less than original steel windows.




  • Design to look and feel like traditional steel windows.
  • 33mm slim frame depth, thermally broken aluminium profile.
  • Reduced costs compared to steel windows.
  • Thermally efficient suitable for refurbishment and new build.
  • Highly secure multi point locking system.
  • Enhanced thermal performance thanks to the thermal break and krypton gas filled units.
  • Suitable for installation into brickwork and existing timber sub frames.
  • Low maintenance polyester powder coated finish.


Glass Options

Standard clear glazing

Planitherm Total +, argon filled double glazing with a warm edge spacer. Centre pane U-value of 1.2 W/M2k.

Square Leaded

Traditional lead lights also known as lead lites combine small pieces of glass with lead detailing to create decorative panels.

Diamond Leaded

Manufactures in the same way as our square leaded glazing, our diamond leaded glass option give achieves a different look to the squre leads.

Horizontal Flat Astragal Bars

Our horizontal bars are designed to replicate traditional Georgian bars popular on 1930's art deco styled steel windows.

Overlapped Astragal Bars

Designed to replicate traditional Georgian bars, the vertical bars overlap the horizontal bars, and are fixed to the outside of the glass for an authentic look.

Butted Astragal Bars

Similar in design to our overlapped astragal bars, out butted astragal bars are meet in a cross to give a flush look.

Self Cleaning Glass

True self cleaning glass manufactured with a dual action coating. The dual action coating users UV rays to break down dirt and then utilises rain to wash it away.

Textured / Obscure Glass

Pilkintons textured and obscured glass available in a wide range of patterns.

Colour Options

Standard White
(KL9010 Gloss)

Standard Black
(KL9005 Matt)

Standard Brown
(KL8014 Matt)

RAL Example - Red
(RAL 3011 Matt)

All of our aluminium windows are polyester powder coated for a hard wearing low maintenance finished, complete with a 10 year guarantee.

Our Heritage windows are available in three standard colours including white, black and brown as weel as dual colour options. Our windows are also available in a single or dual colour RAL colour options giving you hudereds of options. We also can supply a silver annodised finish and some Hammerite style textured paint finishes.

Hardware Options

Classic Straight

Classic scroll

Traditional pegstay


Art Deco Handle

Dummy Parliament Hinges

Dummy butt hinge

Working Butt Hinge