Timber Frame foundation

[firapara]

Hi Guys

Going to build a timber frame side extension on London Clay, see attached plan.

Do I need any foundation, if I do, how deep?
I currently have some patio slabs on a thin bed of concrete there. Was thinking just to do two courses of brick on top of the patio slabs and then DPC and the studwork on top?

Thanks

 

[robinbanks]

How long is this structure intended to last?

 

[^woody^]

The biggest problem with building off the slabs is if you want to change the patio in the future. Have a think, it's good to plan ahead.

 

[firapara]

How long is this structure intended to last?

As long as possible

 

[firapara]

The biggest problem with building off the slabs is if you want to change the patio in the future. Have a think, it's good to plan ahead.

I will just cut the slab with grinder around the extension

 

[freddiemercurystwin]

Obviously, typical woody overthinking things.

 

[noseall]

Going to build a timber frame side extension on London Clay, see attached plan.

I see no plan?

 

[charliegolf]

If it were me, in the absence of expertise, I would start by assuming I needed new, bespoke foundations, and work from there. Then I'd invite experts in new bespoke foundations round to quote. But hey, that's just me... Scaredy cat.

 

[Notch7]

Carpet might be a bit bumpy over paving slabs

 

[firapara]

I see no plan?

Sorry about that

Attached

 

[Notch7]

When you refer to it as an extension, do you mean a space you can access from the house, like a living room

 

[firapara]

Carpet might be a bit bumpy over paving slabs

100mm cellotex and screed will go over the slabs

 

[firapara]

When you refer to it as an extension, do you mean a space you can access from the house, like a living room

Correct

 

[robinbanks]

As long as possible

Oh well, you're definitely taking the right approach

 

[stuart45]

Are you going through Building Control?