Short answer: YES ,but only at the right stage of production.
When a Glass Splashback Can Be Cut
Glass splashbacks are cut to size before toughening, not after.
During manufacturing, the glass is:
Measured and cut to exact dimensions
Shaped for sockets, switches, or cut-outs
Edge-polished for safety and finish
Then toughened to increase strength and heat resistance
Once this toughening process is complete, the glass becomes extremely strong—but also impossible to modify. Any attempt to cut or drill it afterward will cause it to shatter.
This is why made-to-measure suppliers like DIY Splashbacks emphasize accuracy at the ordering stage.
Why Glass Can’t Be Cut After Toughening
Toughened glass is designed to be under internal tension. This is what gives it its durability and safety performance. However, that same tension means:
It cannot be resized
Holes cannot be added later
Edges cannot be trimmed
This isn’t a limitation—it’s a safety feature that’s been standard in the glass industry for decades.
What This Means for Customers Measuring at Home
For customers measuring themselves, precision is critical. Even small errors can lead to:
Poor fit
Installation stress
The need to reorder panels
That’s why suppliers such as DIY Splashbacks provide clear measuring guidance and recommend double-checking all dimensions before placing an order.
Can Installers Cut a Splashback On-Site?
No. Installers do not cut toughened glass on-site. Any splashback that requires trimming after delivery will need to be remade.
This is also why glass splashbacks differ from tiled alternatives. Tiles allow for adjustment during installation; glass relies on upfront accuracy instead.
Why Custom Cut Splashbacks Are Still the Best Option
Although the process demands precision, custom-cut glass splashbacks deliver:
Seamless, grout-free finishes
Perfect alignment with sockets and appliances
Faster, cleaner installation
Long-term durability
From a value and performance standpoint, custom sizing has become the modern extension of traditional craftsmanship.
Final Takeaway
Yes, a glass splashback can be cut to size—but only before it is toughened.
Once manufactured, the dimensions are fixed, making accurate measurements essential.
By working with experienced suppliers like DIY Splashbacks, customers ensure their splashbacks are produced correctly the first time—saving time, cost, and unnecessary stress.