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Groundwork & Foundations Question
Raising level to 4 inch on existing concrete base
I have a shed whose base is concrete but have now noticed the water is sipping through corner. Seems like over the period the concrete has gone down a bit. I wanted to raise it to 4 inch on existing concrete base. I need to know how much material I need to order in bags (25 kg or 50 kg) not in jumbo bags.
The measurement of the shed is (14 foot length x 10 foot width x 4 inch depth
could anyone advise me as how much material (cement+sand+ballast) need in bags of 25 kg or 50 kg not in jumbo bags.
I'm just a plasterer and really you want to speak to a bricklayer, but im used to render and coverage upto 1 inch depth, lets say your shed base is 15 sq mtr, from my experience 1 bag of 25kg sand alone will nearly do 1 sq metre 1 inch depth, but you have 15 x 4 sq mtr.
4 inch depth means
you need about 100 kgs of material per square mtr
so thats 1500 kg of material, getting bulk delivery of pre mix concrete or bulk delivery of all loose materials in one delivery but look at or work out the price per kg on sand, loose price is far cheaper than the 25kg bags,
if you can then have a ton of sand delivered with 300 kg other material and 200kg of cement depending on your base mix, from a supplier who sells sand and aggregate loose, hope this helps
Answered 3rd Jan 2018
It may be more cost effective to shutter the existing base then get a barrow mix company in. They will barrow it in, all you do is level it and float it off. You should be looking at around 1.5 cubic meters and the barrowmix firm only charges for what you use.
Answered 15th Jul 2018