Knowledge · Injection

Lifting a sunken driveway, patio or garage floor

A concrete driveway sinking towards the garage, a patio tilting away from the house or a garage floor that sounds hollow: often there is a void underneath or the ground has settled. With expanding resin we bring the slab back to level without breaking it out.

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Green laser line on a staff while a floor is being lifted

Do you recognise this?

  • Water running towards the house or garage
  • A step appearing at the front door or garage
  • Slabs that sound hollow or rock
  • Cracks or open joints between slabs
  • A patio tilting away from the house

How it works

We drill 12 to 16 mm holes in the slab and inject an expanding resin. It first fills the voids, then compacts the ground and lifts the slab under continuous laser control. After about 15 minutes the resin has 90% of its final strength.

Why not pour a new slab?

Resin injectionBreak out and re-pour
DemolitionNone, only small drill holesWhole slab removed
UsableAfter about 15 minutesAfter weeks of curing
GroundCompacted at the same timeUnchanged without extra work
FinishHoles are sealedNew slab or paving

When not?

For loose tiles or pavers laid on sand, relaying them is often simpler. Resin injection is meant for concrete slabs and floors that have to stay in one piece.

With serious damage, have a structural engineer assess the situation. Soiltek is a specialist contractor: we record, measure, propose a technique and carry out the repair, in consultation with your engineer.

What can we do?

Deep Lift

Expanding resin strengthens the ground under the foundation, without digging.

Slab Lift

Sunken concrete floors back to level.

Frequently asked questions

Can I drive on it straight away?

After about 15 minutes the resin has 90% of its final strength. We agree when the driveway is free again.

Will I still see the holes?

The holes are 12 to 16 mm and are sealed afterwards.

How far can the slab be lifted?

Usually a few millimetres to a few centimetres, until it is level. We have already lifted floors by up to 25 cm.

A project in mind?

Send us photos, a plan or the dimensions of the area. We reply within two working days.

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Read also: Lifting a subsided industrial floor without shutting down your operation · Is injection resin safe for the soil and groundwater? · In which soils does resin injection work?