Security secondary glazing in St Albans

How much should I budget for security secondary glazing in St Albans?

Our guide range for security secondary glazing in St Albans is £594 to £1,794 including VAT (£495 to £1,495 plus VAT) per window, including fitting. The survey is free for new installations and your fixed price follows in writing.

Security secondary glazing is a separate slim window fitted on the room side of an existing window, glazed with laminated glass so it forms a second barrier. It leaves the original window untouched outside, which makes it a common choice for listed buildings, conservation areas and period sash windows.

Specification at a glance

Colour-matched frames to suit the room
Locks and catches that open from inside without a key
Suits sash, casement and arched openings
Noise and draught reduction
Low-E glass for better insulation
Fixed within the reveal, leaving the original window untouched

Fitting in St Albans and nearby

Whether you are in central St Albans or at the edge of the AL1 district, we can arrange a survey. Nearby Harpenden and Hatfield are covered too.

Hertfordshire includes the historic centres of St Albans and Hertford, post-war new towns such as Stevenage and Hatfield, and Watford's shops and office parks along the M1.

Common uses:

Listed homes and buildings in conservation areas
Offices in historic buildings
Ground-floor flats in converted townhouses
Homes on busy roads wanting noise reduction

What to think about first

Escape and ventilation

On windows used for escape, the secondary glazing must open quickly from inside without a key or tool.

Listed building consent

Internal secondary glazing is usually seen as reversible, but consent can still be needed. Check with the conservation officer first.

Consents and safety: England

England

Replacing glass in an existing frame

Replacing only the glass or sealed unit in an existing frame is generally treated as a repair in England rather than notifiable building work. Replacing a whole window or door is notifiable and is normally certified through a competent person scheme or approved by building control. Either way, new glass in a critical location should still be safety glass.

Windows needed for escape

Approved Document B expects many habitable rooms in houses, particularly upstairs, to have an escape window with a clear opening of at least 0.33 m², at least 450 mm high and 450 mm wide, with the bottom of the opening no more than 1,100 mm above the floor. Changing the glass does not alter that, but locks, secondary glazing and film must not stop the window opening. Laminated glass is hard to break through, so escape always relies on the window opening.

How it works

Postcode and a few photos
On-site survey
Fixed written price and lead time
Fit, check and explain

Security secondary glazing in St Albans: questions

Do you cover Harpenden as well as St Albans?

Yes. As well as St Albans, we can arrange surveys in nearby Harpenden, Hatfield and Hemel Hempstead. Dates depend on installer availability.

Will secondary glazing cause condensation?

A well-fitted unit usually reduces condensation on the inner pane. Some ventilation of the gap may be needed, which we discuss at the survey.

Do I need permission for secondary glazing in a listed building?

It depends on the building and the council. Internal secondary glazing usually has less impact than replacement windows, but listed building consent may still be needed. Ask the conservation officer before ordering.

Is secondary glazing safe for escape windows?

It can be, as long as it opens quickly from inside without a key. We design catches and handles for that.

Security secondary glazing in nearby towns

Other glazing in St Albans

Start with a guide price online, then we survey and fix the price in writing.