What should security secondary glazing cost in Dorchester?
Guide prices for security secondary glazing in Dorchester are £594 to £1,794 including VAT (£495 to £1,495 plus VAT) per window for supply and fitting. We confirm a fixed price in writing after a free survey, before any glass is ordered.
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 goes into security secondary glazing
- Suits sash, casement and arched openings
- Low-E glass for better insulation
- Locks and catches that open from inside without a key
- Fixed within the reveal, leaving the original window untouched
- Laminated glass in slim aluminium frames
- Colour-matched frames to suit the room
Fitting in Dorchester and nearby
Surveys in Dorchester (DT1) are booked around installer availability. We also cover nearby Weymouth (7 miles), Bridport (14 miles) and Yeovil (18 miles).
Dorset covers Bournemouth and Poole's seafront hotels, offices and shopping streets, Georgian fronts in Weymouth, and stone market towns such as Dorchester, Bridport and Sherborne.
Good candidates for security secondary glazing:
- Period sash windows with original glass
- Listed homes and buildings in conservation areas
- Offices in historic buildings
- Homes on busy roads wanting noise reduction
Before the glass is ordered
Listed building consent
Internal secondary glazing is usually seen as reversible, but consent can still be needed. Check with the conservation officer first.
Frame colour and sightlines
Slim frames that line up with the existing meeting rails make the secondary glazing almost invisible from outside.
Glazing rules in England
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.
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 Dorchester
- Accept the fixed quote
- Fitted by glaziers working under our contract
Security secondary glazing in Dorchester: questions
Can you survey in Dorchester and nearby towns?
Yes. Surveys in Dorchester, Weymouth and Bridport are booked around 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.
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.
Does secondary glazing reduce noise?
Yes, often noticeably, because of the air gap between the two panes. Laminated glass helps further.
Security secondary glazing in nearby towns
Other glazing in Dorchester
- Misted unit replacement with laminated glass
- Display case security glass
- Security glass for doors
- Counter and reception security screens
- Anti-ram-raid glazing
- Security glass for home windows
Tell us about the glazing and we will come back with a guide price.