Should I be worried about cracks in plaster?

Cracks in plaster and drywall



Cracks that are horizontal or vertical are generally a sign of the plaster drying or shrinking. You’ll often see these types of cracks in newer homes or after you’ve had work done and they aren’t really anything to worry about.

When should I be concerned about hairline cracks?





Hairline cracks of less than one millimetre in width or slight cracks of between one and five millimetres are generally not a cause for concern. If you begin to notice these, they can generally be filled and painted over as they’re a crack in the plaster but not in the wall itself.

Are hairline cracks in plaster normal?

Hairline cracks in plaster can present them in different forms, patterns and lengths. In most cases, hairline cracks are not a sign of structural failure. Often, a wall or ceiling could have been freshly plastered and the hairline cracks appear due to shrinkage in the plaster.

How do you know if crack in drywall is serious?

Recurring cracks or drywall cracks larger than 1/8″ wide are usually signs of significant structural concerns that should be addressed as soon as possible. As the structural components of a home continue to settle, deflect, or deteriorate, the cracks will tend to lengthen and widen.

How can you tell if crack is structural?

As the name suggests, structural cracks occur because of poor construction sites, overloading or poor soil bearing.



Telltale signs of structural cracks in your foundation are:

  1. Stair-step cracks.
  2. Cracks on foundation slabs or beams.
  3. Vertical cracks that are wide at the bottom or top.
  4. Cracks measuring 1/8″ in width.





Can a house collapse from cracks?

The answer is yes, however, it is also not that simple. It can take years to develop a serious foundational issue that would cause your home to collapse. In most cases, if it does, it’s concentrated on a specific area of the home.

Are cracks always subsidence?

Not all cracks are due to subsidence – fine, hairline cracks are usually nothing to worry about. Subsidence cracks to be wider than a ten pence piece. Cracks caused by subsidence.

Where do subsidence cracks appear?

There are many visible signs, on both the inside and outside of a property, which suggest the existence of subsidence. The usual indications of subsidence are: Cracks in the walls, ceilings and outside brickwork.

How do you identify subsidence?



What are the tell-tale signs of subsidence?

  1. Large cracks in a wall, usually around a door or window frame, which are wider at the top than they are at the bottom. …
  2. Doors and windows sticking.
  3. Sloping floors – this is common in older properties.

What are settlement cracks?

Settlement. A home may experience some minor cracking as it settles down on its new foundations. The ground underneath the home can compact under the weight of the structure, which causes the home to move downwards. Settlement usually occurs in newer properties, but it soon stabilises.

How do you fix deep cracks in plaster walls?

Quote from the video:
Quote from Youtube video: You can't just slap it on and pull it over because you've got support keypoint extra on and pushing it in in the same place because you forcing it into the back and the plaster just helps it a.

Are cracks in walls structural damage?



Wall cracks are usually a sign of foundation movement but they don’t necessarily mean there’s structural damage. In other words, a foundation can move slightly and cause a wall crack, but that doesn’t mean there’s any structural damage requiring a foundation repair.

Do cracks mean foundation problems?

Fine, small cracks in the exterior walls or on the steps are usually nothing to worry about. Exterior cracks that are large and have a zig-zag pattern may be a sign that there’s something wrong with the foundation. Brick cracks or bricks that are protruding from the wall should be checked.

Is it normal for old houses to have cracks?

Cracks are usually caused by settlement, but not necessarily. Expansion and contraction can cause them, as can inadequate framing members. Houses move with the climate: Heat and moisture will make them expand, cold and dryness will make them contract. This movement is normal and in most cases will not cause cracks.

How wide are structural cracks?

Size of cracks



0 – Hairline cracks: Less than 0.1 mm in width. No repair action required. 1 – Fine cracks: Up to 1 mm in width. Generally restricted to internal wall finishes.

How much wall cracking is acceptable?



Foundation cracks; wall and floor cracks.



A 1/16 inch crack is quite common when a home starts to settle. These hairline cracks should be vertical and should be between 2 – 6 inches in length. Having horizontal cracks of any size will indicate that you have more than the normal settling.

How do you monitor subsidence cracks?

Crack Monitoring



We affix stainless steel studs using strong glue (so none intrusive easily removed) and measure the distance between the centre holes of the studs. This data is recorded and repeated periodically to confirm if a crack is opening or closing.

How wide are settlement cracks?

Additionally in newer properties there can be a certain period of “settlement” that the house has to go through whereby effectively everything “settles down”. This can in turn cause small cracks to appear. In terms of the size of these cracks, a settlement or shrinkage crack is really anything less than 0.5mm in width.

How does a surveyor check for subsidence?

What is involved in a subsidence survey? A specialist will come to your property to carry out an investigation into the existence and extent of subsidence. This will begin with a visual inspection to look at cracks in the walls, sticking doors and windows and other obvious signs of subsidence.

Does building insurance cover cracked walls?



Most standard building insurance policies will cover cracks in walls caused by subsidence, as long as your home hasn’t had subsidence before. If your cracks in walls aren’t caused by subsidence, it’s unlikely that your buildings insurance will pay for any repairs.