Problems · Signs

A sloping floor or sticking doors: is your house subsiding?

A door that suddenly sticks or a marble that rolls away by itself can be the first signs that part of your home is sinking. But not always. This is how to tell the difference.

Report your cracks Subsidence survey

Timber façades whose lines lean away

When should you pay attention?

  • Doors or windows that used to close well and now stick
  • Gaps above a door that grow on one side
  • A floor that slopes to one side, or tiles that crack
  • Together with stepped cracks in the brickwork

Rule out other causes

Timber doors and windows can also swell with damp and shrink in dry weather. A timber floor can sag because of a weakened joist. Check whether the problem changes with the season and whether there are cracks in the walls too.

Measure it yourself

  • Place a spirit level or a marble on the floor in several rooms
  • Measure the gaps around doors and note the date
  • Monitor wall cracks with a crack gauge
  • Repeat after a few months: if it grows, have it surveyed

What if it is subsidence?

Then we first find the cause with a subsidence survey. If bearing ground lies deep, Magnum Push Piers carry the foundation down to firm ground, and where possible we lift it back in a controlled way. A sunken concrete floor we bring back to level with Slab Lift.

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 a sloping floor be levelled again?

Often, yes. A sunken concrete floor is lifted with expanding resin (Slab Lift). If the foundation is subsiding, we stabilise it with push piers and lift it back where possible.

Does a door always stick because of subsidence?

No. Damp and temperature play a part too. If cracks appear as well or the problem grows, have it surveyed.

How quickly should I act?

Do not wait until cracks are wider than a few millimetres: the earlier you act, the more limited the repair.

Not sure?

Send us a few photos of the cracks and the surroundings of your house. We will look, with no obligation, at what may be going on.

Report your cracks

Read also: An extension or conservatory that is subsiding · Screw pile or concrete foundation: which fits your project?