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yeah of course. All the shuttering was spare wood lying around my shed or garden and so were the bricks and paving slabs so no cost there. I also have a plasterers float and various tools etc already.
The size of the extension is circa 2' 6" wide by 6' long by 6" deep (sorry it's not in metric) and took 4 bags of cement (£20) plus 16 bags of ballast (£36) to fill.
The greenhouse was free too so total cost was nominal. Don't think I'm missing anything.
You might need to hire a mixer cos this makes it ten times easier but if you can beg, steal or borrow one that is the ideal result.
Would you mind posting the total cost when done?
Always curious how it stacks up with the other options.