schedule surfaces

[Ahmed_K]

Hi mates, i'm new with schedules , and i encountered this issue, why it's showing 6.05 or 6.09 on a surface that would be just a 6.00m² ??
the attachement explains it better !

and what is the best method to calculate interior finishes, ??

thanks

[Barry Kelly]

It looks like you are using a 'component' schedule rather than a 'surface' schedule.
When you look at how the walls trim you will see that the skins will trim each other as in the attached image.
So one skin length will include the width of the skin x 2 (6.09), 2 skin lengths will include the width of the skin x 1 (6.05) and only on skin length will not include any extra skin width (6.00).
Your skin width must be 0.045 and is being rounded up to 0.05 due to the number of decimal places.

Barry.

[Ahmed_K]

Th anks Barry for your feedback , i got it, and i should use surface schedule instead of component,, a d it should work for slabs and roofs,