How much does blast-resistant glazing cost in Welwyn Garden City?
Our guide range for blast-resistant glazing in Welwyn Garden City is £450 to £1,495 plus VAT (£540 to £1,794 inc VAT) per m², including fitting. The survey is free for new installations and your fixed price follows in writing.
Blast-resistant glazing is laminated glass fitted in a frame and fixing system designed to stay in the opening, or fail safely, when hit by the pressure wave from an explosion. Its purpose is to stop glass becoming high-speed fragments, which cause most injuries in a blast, and it is designed from a threat assessment rather than chosen off the shelf.
Choices you can make
- Anti-shatter film with edge-retention systems for existing windows
- Laminated glass with thick or stiff interlayers
- Sealed units with a laminated inner pane
- Work planned from the threat assessment and engineer's design
- Blast-resistant net curtains as a fragment-catching layer
- Manufacturer's test evidence supplied with your quote
Fitting in Welwyn Garden City and nearby
We can arrange blast-resistant glazing anywhere in Welwyn Garden City, and in nearby Hatfield, Hertford and St Albans. Tell us your postcode and we will offer dates.
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 blast-resistant glazing:
- Transport hubs, venues and stadium frontages
- Laboratories and industrial sites with process risks
- Embassies, courts and police premises
- Offices in city centres and near potential targets
Things to decide before you order
Frame and fixings
The frame must hold the glass and the fixings must hold the frame. Upgrading glass alone can move the failure to the frame.
Fragment hazard
Some designs accept that glass will break but keep it in place; others allow controlled failure into a catching system. Both aim to stop flying shards.
Rules that apply in England
Planning permission
Changing the glass in an existing window or shopfront does not usually need planning permission, because the building looks much the same afterwards. A new or altered shopfront, or security features added to the outside of a building, may need planning permission from the council. Bollards or barriers on the pavement need the highway authority's consent, which is normally the council.
Fire-rated glass is different
Glass in fire doors, fire screens and protected escape routes has to be fire-rated glass tested as part of that door or screen system, under Approved Document B and the fire safety duties of the building's responsible person. Laminated and security glass are not fire-rated unless the product says so. Where a pane needs both fire and security performance, it must be a product tested for both.
How it works
- Guide price online or by phone
- Survey in Welwyn Garden City
- Accept the fixed quote
- Fitted by glaziers working under our contract
Blast-resistant glazing in Welwyn Garden City: questions
Which areas near Welwyn Garden City do you cover?
We can arrange work in Welwyn Garden City and in nearby Hatfield (3 miles), Hertford (6 miles) and St Albans (6 miles). Dates depend on installer availability.
Does blast glazing affect fire doors and fire screens?
Glass in fire-rated doors and screens must stay fire-rated glass tested in that system. Blast measures there need fire-rated products or a specialist design, never a swap to plain laminated glass.
What does ER1 to ER4 mean?
They are explosion-pressure classes in BS EN 13541. Glass samples are tested in a shock tube, with higher classes meaning higher pressures. The class applies to the glass, so the frame must be designed to match.
Who decides what level of protection we need?
Your security adviser, insurer or a blast engineer, based on a threat and risk assessment. Government guidance from the National Protective Security Authority covers the approach.
Blast-resistant glazing in nearby towns
Other glazing in Welwyn Garden City
- Bullet-resistant glass
- Security glass for doors
- Commercial reglazing
- Security secondary glazing
- Security glass for home windows
- Display case security glass
Tell us about the glazing and we will come back with a guide price.