100mm building blocks measuring as 90mm, why is this?

[nuzuki]

Has anyone else noticed blocks advertised as 100mm are actually nearer 90mm. Why is this? I feel Ive been short changed.

Thanks for the replies

 

[Ian H]

That's a bonus, your room will be 10mm bigger.

 

[stuart45]

90mm is the minimum width for the leaf of a cavity wall.

 

[StudWall]

usually because

"sizes quoted include 10mm mortar joint"

apparently to make it easier for you to calculate how many you need

 

[Charlie George]

If within tolerance they should be no less than 95 mm, otherwise classed as seconds, bet you did'nt pay seconds price though.
Jim

 

[^woody^]

The merchant have you a 10% discount.

 

[nuzuki]

Thanks for your replies. I did the job over a year ago now and blocks are doing ok. This was Jewsons selling these blocks. I shant be using them again.

 

[freddiemercurystwin]

Is it a bit late to be worrying now?

 

[nuzuki]

I had an idle mind and fingers yesterday and the girlfriend was out so I thought id put them to use here