Garage concrete floor

[Clamps]

Hi all,
I am about to embark on a workshop/garage and was wondering do i really need to lay hardcore before the concrete slab. The workshop is to be used for restoring a land rover.

My thoughts are that i will need 4" of hardcore and 4" of concrete, but i would welcome constructive advice - thanks

 

[RonnyRaygun]

Hi all,
I am about to embark on a workshop/garage and was wondering do i really need to lay hardcore before the concrete slab. The workshop is to be used for restoring a land rover.

My thoughts are that i will need 4" of hardcore and 4" of concrete, but i would welcome constructive advice - thanks

Don't forget you will be putting some concentrated loads onto the garage floor, especially with jacks, axle stands etc.

With that in mind, here's a good spec from a document I downloaded a while ago...

Garage concrete floor.
Power floated 150 mm thick concrete slab (concrete mix should be in accordance with BS 8110, BS 5328, mix type ST2 or GEN1), with 1 layer A252 steel mesh positioned mid span of slab on 1200g visqueen dpm/radon barrier on sand blinding on min. 150 well consolidated sulphate free clean hardcore.(no reclaimed demolished material is permitted).
1:80 fall on floor from back of garage to front garage door, floor to be thickened to 300mm at garage entrance.

http://www.fdean.gov.uk/media/Asset...ocuments/NEW_DWELLINGS_GUIDANCE_EDITION_5.pdf

 

[Clamps]

Thanks - i knew this was the right place to come - sensible and helpful advice for newbees.