Wall thickness regs in scotland

6
Posted 12th Jul
We have space to side of the house which we are thinking of extending into but wondered what the wall thickness would be.

The space is 3m but would need to leave some to access back garden, so was thinking 2.10 metres for extension, but how much of that would be lost due to wall thickness?

Our current walls are about 30cm thick.

Thanks
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For masonry about 255mm depending on cavity thickness plus extra 10-20mm for internal plastering.
Should get an extra 1.8M of useful space then, but don't forget when you knock though to the main house you can gain the 30cm of the old external wall back, if the extension is to an existing room . If the extension was an extra room then you would only gain the wall thickness at the new door way.
Edited by: "yorkie12" 12th Jul
yorkie1212/07/2020 09:45

Should get an extra 1.8M of useful space then, but don't forget when you …Should get an extra 1.8M of useful space then, but don't forget when you knock though to the main house you can gain the 30cm of the old external wall back, if the extension is to an existing room . If the extension was an extra room then you would only gain the wall thickness at the new door way.


Thanks, the extension would be next to kitchen but we want to keep it closed off and not want to run into kitchen (like continous space). Idea is this additional space will be for a utility area/workshop which will be handy for storing coats, shoes, buggies, laundry, hoover, tools, etc.
ran123ran12/07/2020 09:53

Thanks, the extension would be next to kitchen but we want to keep it …Thanks, the extension would be next to kitchen but we want to keep it closed off and not want to run into kitchen (like continous space). Idea is this additional space will be for a utility area/workshop which will be handy for storing coats, shoes, buggies, laundry, hoover, tools, etc.


That sounds like what our integral garage gets used for. It makes a big difference not having to have the washer and tumble dryer in the kitchen too.
yorkie1212/07/2020 10:10

That sounds like what our integral garage gets used for. It makes a big …That sounds like what our integral garage gets used for. It makes a big difference not having to have the washer and tumble dryer in the kitchen too.


The garage was converted to office/play room so have had to store all above items in cupboards in various places around house. We have a c2m x 3m utility room stuck behind kitchen but want to incorporate that into kitchen and extend kitchen so can use as kitchen/diner and then add a sunroom leading off that.

New utility should be c1.9m by 6m so plenty space for what I need (although very narrow).
If your only doing 300 mm thick make sure u have king span insulation board on the inside of the kit if u are doing it in kit form
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