Width of foundation

Question

Roughly how wide should my foundation be the wall will be a course of brick backed up by a block

Darren · Accepted Answer

600mm wide. So thats 100mm of brick, 100mm cavity, 100mm block = 300mm + 150mm bearing either side of the wall = 600mm

Jason · Answer

Hi there, Generally minimum width of the foundation would be 450mm

Ed · Answer

600mm is standard if having a 100mm cavity. if your not having a cavity then 400-500mm should be fine.

Many thanks, 
Ed.

Lucan · Answer

It will be around two brick in line as your wide guideline.

Karl · Answer

It should be around 10inch wide and 2ft down this allows for the brick and block with a small cavity

Sebastian · Answer

Will depend on what your plans are to build there, need more info to give you an answer

Richard · Answer

The width of the foundation depends on the local soil type, but generally the minimum is 450mm. The concrete used in the conservatory foundations should have a minimum depth of 225mm.

Bobby · Answer

For a light garden wall, a trench 30 cm (12 inch) deep should be sufficient if the soil is firm and well drained. But on unstable or weak ground, make it 46 cm (18 inch) deep.

Andrew · Answer

A foundation of 1.2m deep by .6m wide is recommended

Keith · Answer

The foundations need to be at least 3 times the width of a half brick wall (i.e. 34 cm/13.5 inch) or at least twice the width of a one brick wall (i.e. 45 cm/18 inch).

Width of foundation

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