Footing fit timber frame extension

Question

Hi looking to build a single story extension (timber frame with a flat roof, can anyone advise what depth footing I will need? The dimensions are 4mx5m just costing it all up atm 
Thanks

Mark · Accepted Answer

Hi, the footings will still need to be 1000mm deep at a minimum, building inspector will look at 1000mm deep and determined whether you need to go deeper.

Regards Mark

Andrew · Answer

I would advise you speak to the local building control they will be able to advise you ok

Brian · Answer

The minimum footing that building regulations allow on single story extension it 350mm but each footing is taken on the merits of the land condition ie boggy ground or trees in close location to the build but your building inspector weather it’s council or private will advise you on the correct method he will want your builder to use

Steven · Answer

1 meter min as That’s building regs and deeper if trees are within 5 meters

James · Answer

Usually local Building Control would want a 1 m dig and at least a 600mm trench field concrete footing and then dense concrete blocks underground with damp proof course at at least 150 mm above ground level then a timber soleplate would be fitted and built off of thisAs a timber frame construction.

Ralph · Answer

I would say about 0.800 to 1.000 will be more than Adequate

Danny · Answer

The footings will still need to be a min 1 metre deep, if you have trees near by you may need to go deeper to be below the roots

Aytac · Answer

It would really depend on the ground itself .

min of 750mm in low plasticity clays, 900mm depth in medium, and British Standard 8004 recommends a minimum depth of 1m for foundations in the highest risk areas. If there are, trees nearby, depths of up to 3m may be necessary

Footing fit timber frame extension

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