Question 1

What is secondary glazing?

Accepted Answer

A slim, second internal window fitted to the inside of your existing window, creating a double-glazed effect without damaging the original frame.

Question 2

Will it work with my listed building?

Accepted Answer

Yes — secondary glazing is the preferred solution for listed buildings and conservation areas because the original windows remain untouched.

Question 3

How much noise will it cut?

Accepted Answer

Up to 80% (over 50 decibels) with acoustic glass and an optimum 100–200mm air-gap — around 5× the performance of double glazing.

Question 4

How much warmer will my property be?

Accepted Answer

Up to 65% better thermal performance vs single glazing. U-values as low as 1.868 W/m²K are achievable.

Question 5

What glass options are available?

Accepted Answer

Standard 4mm toughened safety glass. Optional laminated, acoustic, Low-E thermal and obscure glass. Vision HD takes up to 28mm sealed double-glazed units.

Question 6

How much does it cost?

Accepted Answer

From around £163.66 per window depending on size, glass and frame style. Free detailed quote within one working day.

Question 7

Can I still clean my original windows?

Accepted Answer

Yes — most of our systems either slide or lift out, giving you full access to clean both panes.

Question 8

Do you cover commercial projects?

Accepted Answer

Yes. Offices, hotels, schools, healthcare and council buildings across South Yorkshire. Bulk pricing and out-of-hours install available.

Secondary Glazing FAQs