Concrete Base Installation in Greater Manchester
A shed or garden room is only as good as the base under it. We dig out, shutter, pour and level concrete bases built to your supplier’s exact spec.
Concrete Base Installation
With so many people working from home, garden rooms and offices are going up everywhere, and every one of them needs a proper garden room base. A base that’s out of level, too thin or poured straight onto soft ground causes doors that won’t shut, floors that bounce and, in some cases, a voided warranty from the building supplier. Getting the concrete right first means everything on top goes up square.
Our process is straightforward: we dig out to the right depth, lay and compact a hardcore sub-base, set up timber shuttering to the exact footprint, fit a damp-proof membrane and reinforcement mesh where the spec calls for it, then pour, tamp and level the slab. For bigger bases we bring in ready-mixed concrete so the whole slab goes down in one go and cures even. For bigger bases we bring in ready-mixed concrete so the whole slab goes down in one go and cures even. Most garden room and shed suppliers issue a base specification with their building. Send it over and we’ll build to it exactly, so there’s no argument on installation day.
It’s not just garden rooms. A plain shed base is bread-and-butter work for us, along with bases for summerhouses, log cabins, greenhouses, garages and hot tubs, plus concrete hardstanding for a caravan or trailer. The loads vary a lot, so the slab should as well. A hot tub full of water is surprisingly heavy, and a garage base needs more depth and reinforcement than a 6x4 shed. We’ll tell you honestly what your project actually needs and what it’ll cost, and whether an existing concrete pad is up to the job before you spend money replacing it.
- Shed bases, garden room bases, offices and summerhouses
- Reinforced garage bases and hot tub bases
- Built to your supplier’s exact base specification
- Full dig-out with soil and waste carted away
- Compacted hardcore sub-base under every pour
- Shuttered, tamped and laser-levelled
How It Works
Free site visit
We measure up, check levels and access, and ask what’s going on top, because that decides the depth, mesh and finish.
Written quote
A clear, itemised price covering dig-out, sub-base, concrete, labour and waste removal. Fixed and in writing before we lift a tool.
Dig, shutter and pour
Ground dug out, hardcore compacted, shuttering set square and level, membrane and mesh fitted, then the slab poured and tamped.
Cure and handover
We protect the fresh slab, take all waste away, and tell you exactly when it’s ready to build on.
Concrete Bases FAQs
For most sheds and garden rooms, around 100mm of concrete over a compacted hardcore sub-base is the standard. A garage base, hot tub base or heavier structure usually needs 150mm with reinforcement mesh. If your building comes with a supplier spec, we build to that. It overrides any rule of thumb.
Yes, that’s exactly how we prefer to work. Most garden room and shed companies issue a base drawing with dimensions, thickness and tolerance. Send it over with your enquiry and we’ll quote against it, so the installers have nothing to complain about when they arrive.
You can walk on fresh concrete after a day or two, but most suppliers want the base cured for around five to seven days before a building goes up, and concrete keeps gaining strength for weeks after that. We’ll give you a straight answer on timing when we pour, based on the weather and the load going on top.
Usually no. A shed base the exact footprint of the building, or fractionally smaller, lets rainwater drip past the walls instead of pooling and soaking back into the timber. Some suppliers specify a small margin, so we always work from their drawing where one exists.
Yes. The dig-out, the old surface if there is one, and all spoil removal are included in the quote. We also compact a proper hardcore sub-base before any concrete goes in, because pouring a concrete pad straight onto soil is how bases crack.
Concrete Bases Near You
We provide concrete bases across Leigh and the surrounding towns. Pick your area for local details.