Celcon block garage build

[diyreg]

I'm going to build one and wanted to run some ideas past you folks as a sanity check!

Foundations: Slab 45cm below ground, 35cm wide, so 12.5cm either side of blocks. Good soil and the garage will have a light flat roof

Blocks: Celcon lightweight blocks (440x215x100mm). Will be a rendered and painted finish eventually

Walls: 6m long, 4.5m wide, 2.3m high. Single block with piers at front by door opening and half way along 6m sides.

One question - with the piers (which will be 10cm wide), do I need to mkae the foundations larger at these points to spread the load or wont this matter?

 

[diyreg]

I'm going to build one and wanted to run some ideas past you folks as a sanity check!

Foundations: Slab 45cm below ground, 35cm wide, so 12.5cm either side of blocks. Good soil and the garage will have a light flat roof

Blocks: Celcon lightweight blocks (440x215x100mm). Will be a rendered and painted finish eventually

Walls: 6m long, 4.5m wide, 2.3m high. Single block with piers at front by door opening and half way along 6m sides.

One question - with the piers (which will be 10cm wide), do I need to mkae the foundations larger at these points to spread the load or wont this matter?

On the old adage of no news is good news, this presumably all looks sane

 

[Deluks]

You'd be better going for 100 or 140mm concrete blocks, more solid and much easier to render. Foundation should project by minimum of 150mm either side, and that includes around piers and projections, so yes to your question.

Ideally you should stick a pier centre of the 4.5m span too. You'd also be better off digging down to 700mm as the bottom of your foundation, which should be 225mm thick.