Double Glazing

Double Glazing is basically two panes of glass sealed together, separated by a thermal spacer bar and an air space between them filled with Argon gas – more commonly known as Double Glazed Sealed Units. Double glazed sealed units are glazed within window frames, making a thermal efficient window. These windows are specifically designed to improve heat retention in homes and buildings, other benefits include;

• Reducing condensation

• Noise reduction

• Increase in security

• Reduces energy usage

• Easy maintenance

• Adds to the value of your home

Whether you are looking to reduce your energy bills, keep your home quieter or warmer, Crownhill Glass can recommend and provide the best combination of glass types to suit your specific needs. We provide a wide range of secure and thermally efficient double glazed products, some of which include;

• uPVC Double Glazed windows and doors

• Aluminium Double Glazed windows and doors

• uPVC / Aluminium vertical double glazed sliders

• Timber casement and sash windows

• Double Glazed bi-folding doors

• Double Glazed horizontal sliding doors

Replacing Glass

Replacing Double Glazed Units

Boarding Up

Secondary Windows

Secondary Glazing involves installing a fully independent single glazed window on the inside of your existing window. It is designed to provide additional insulation and soundproofing to your windows whilst retaining the external character of your home or building. 


Secondary glazing is ideal for public places, listed buildings, conservation areas and domestic homes where addition insulation is required, without damaging or changing the appearance of the existing windows. The secondary glass acts as an internal form of double glazing, trapping air between itself and the existing window.

Advantages of secondary glazing are

• Improves sound insulation

• Improves thermal insulation

• Improves heat retention, which can lead to lower energy bills

• Improves security

• Reduces draughts and condensation

• Hardly noticeable when fitted

Crownhill Glass offers the following services

• Supply and install of various types of secondary glazing

• Horizontal sliding secondary glazing

• Vertical sliding secondary glazing

• Top / Side hinges secondary glazing

• Lift out Secondary glazing

Get Your Quote or Call: +44 20 8459 8765

We look forward to hearing from you.