Like all types of glass, shop window glass is tightly regulated in the UK. If your glazing isn't compliant with these regulations, you could face a fine or even imprisonment.
There are two reasons for these regulations. First, they exist to protect people who use your shop. And secondly, it's to keep your commercial property safe in the event of a break-in or act of vandalism.
This article is intended as an overview of these regulations and is in no way a substitute for the regulations themselves. Be sure to do your own research and consult an expert if you're unsure.
What Building Regulations apply to shop window glass?
Three documents from UK Building Regulations apply to shop window glass: Approved Document K (Part K), Approved Document L and Approved Document B.
Approved Document K (Part K) – safety glass in critical locations
Approved Document K (Part K) regulates the kinds of glass you can use in areas where people might collide with glazing. In these "critical locations", the glass must either be safety glass that breaks safely and resists impact or be shielded from people by a barrier.
As well as shop windows, this applies to glazing in doors, side panels next to doors, internal glass partitions and glazing near stairs and ramps.
Safety glass can either be
toughened glass (also known as tempered glass ) or
laminated glass .
Approved Document L – U-value and installation standards
Approved Document L stipulates that new or replacement shop windows must meet minimum U-values and insulation standards.
Approved Document B – fire safety
Approved Document B states that windows, walls, doors and partitions that resist fire must be fire-rated. Fire-rated glass is tested to BS EN 1363 and BS EN 1634 standards and must meet integrity and insulation ratings.
What legislation affects shop window glass?
Legislation also governs the use of glass in shop windows. The Equality Act 2010 covers accessibility requirements for people with disabilities.
Shop window glass must be clearly marked with manifestations – vinyl strips, signs or patterns at set heights – to accommodate people with visual impairments.

Fire safety is also covered by the Health and Safety at Work Act 1974.
More shop window glass FAQs
