Conservatory foundation

A conservatory or veranda without a concrete foundation

A conservatory or veranda stands against your house and has a lot of glass. So it must not settle differently from the house. Screw piles down to bearing ground give a stable base, without digging along the façade.

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Timber unit with large glazing on screw piles

Why no concrete?

No digging along your façade and no soil to remove
Down to bearing ground, so it does not settle differently from the house
Ready to load at once, no weeks of curing
Level to a few millimetres, important for glass and sliding doors
Vibration-free, even right next to the existing foundation

Which foundation?

Ground screws

For a light conservatory on good ground, PRO ground screws with a head plate are often enough.

Screw piles

On clay, made ground or for a heavy glazed extension we screw down to the bearing layer.

Beam or floor frame

The conservatory rests on a beam or floor frame on the piles, at the same height as the house.

How it works

How it works on site

Setting outWe set out the piles to the plan and check for utilities.
Screwing inBy hand-held machine or compact tracked machine, even in a back garden.
To levelAll heads at the level of the house floor.
BuildingThe conservatory can go straight onto the piles.

Grid of screw pile heads in a garden — Pile heads in a grid, ready for building

Frequently asked questions

Why not just a concrete slab?

A slab needs digging along the façade and can settle differently from the house. Screw piles down to bearing ground prevent that.

Can the conservatory connect to the house?

Yes. We set the piles to the level of the house, so the floor connects neatly.

My conservatory is already subsiding: what now?

Read our article on a subsiding extension or conservatory, or report your cracks for a subsidence survey.

Ready for your project?

Send us the dimensions or a plan. We reply within two working days.

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