I recently fitted a glass splashback behind my gas hob ( in the instructions it stated there must be 110mm between the splashback and the hob) , and when i measured the gap it 'looked' like 110mm, after two days the splashback cracked, I was told by the company i bought it from to photograph the damage and the distance and to take them into the store so they could send them off to the supplier.
The supplier have said it looks like 106mm on the photos,so its not their problem, and that looks like the line the shop are going down,when i measured it again its 108mm.
My question is this, would 2mm make the difference between heat cracking the splashback or not?
If its any help the splashback is to BS7449, but doesn't state if the splashback is heat resistant or not?