Security secondary glazing in Harpenden

How much does security secondary glazing cost in Harpenden?

Our guide range for security secondary glazing in Harpenden 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.

What you can specify

Suits sash, casement and arched openings
Locks and catches that open from inside without a key
Noise and draught reduction
Vertical sliding, horizontal sliding, hinged and lift-out styles
Colour-matched frames to suit the room
Laminated glass in slim aluminium frames

Fitting in Harpenden and nearby

We arrange surveys and fitting in Harpenden and across the AL5 postcode district, as well as in nearby St Albans (5 miles) and Luton (5 miles). Dates depend on installer availability.

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.

Typical places for security secondary glazing:

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

Things to decide before you order

Escape and ventilation

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

Frame colour and sightlines

Slim frames that line up with the existing meeting rails make the secondary glazing almost invisible from outside.

Rules that apply in England

England

Listed buildings and conservation areas

In England, listed building consent from the council may be needed to replace historic glass such as crown or cylinder glass, or to alter glazing bars, sashes and frames. Historic England publishes guidance on traditional windows. Secondary glazing and window film are often easier to agree because they can be removed later, but the council's conservation officer makes the decision.

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.

How it works

Guide price online or by phone
Survey in Harpenden
Accept the fixed quote
Fitted by glaziers working under our contract

Security secondary glazing in Harpenden: questions

Do you cover St Albans as well as Harpenden?

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

Can I still open my sash windows?

Yes. Secondary glazing slides, hinges or lifts out so the original window can be opened and cleaned.

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.

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.

Security secondary glazing in nearby towns

Other glazing in Harpenden

Tell us about the glazing and we will come back with a guide price.