Foundation Repair: How to Spot Problems and Choose the Right Fix

If you’ve noticed cracks in walls, doors that won’t close, or floors that feel uneven, your home’s foundation might be sending a warning. Ignoring these signs can lead to bigger, costlier issues down the line. In this guide we’ll walk through the most common symptoms, simple ways to check the severity, and the repair routes you can take – whether you’re comfortable with a DIY patch or need a structural engineer.

Common Signs Your Foundation Needs Attention

First, look for hairline cracks that run horizontally across brickwork. A crack wider than 3 mm (about the thickness of a pencil) usually means the foundation is moving. Also check for doors and windows that stick – that often indicates the frame has shifted. Uneven floors, especially if you can see a clear dip or slope, are another red flag. Finally, keep an eye on external factors like nearby tree roots or drainage problems; they can accelerate foundation movement.

Repair Options and What They Cost

Once you know there’s a problem, you have three main paths: DIY sealants for tiny cracks, underpinning for bigger shifts, and chemical injection for medium‑size gaps. For a simple crack under £150 you can clean it out and fill it with hydraulic cement – make sure the cement is labeled for foundation work. Underpinning, which adds new concrete footings beneath the existing ones, typically starts around £1,500 per metre and can climb quickly if soil conditions are poor. Chemical injection, using epoxy or polyurethane, falls in the £300‑£800 range and works well for cracks up to 10 mm.

Before you spend any money, get a structural engineer to assess the situation. Their report will tell you if a DIY fix will hold or if you need a professional crew. Many engineers in the UK offer a free initial site visit, especially if you mention you’re comparing quotes.

Choosing the right contractor is about more than price. Look for companies that are members of the Federation of Master Builders, ask for references, and check that they carry public liability insurance. A reputable builder will also explain the repair process step‑by‑step and give you a written guarantee.

If you decide to go the DIY route, make sure you have the right tools: a core drill for larger holes, a sturdy mixing bucket, and a trowel for smoothing cement. Follow the manufacturer’s instructions on mixing ratios – too much water weakens the repair, too little makes it hard to work with.

After the repair, monitor your home for at least six months. Re‑measure any cracks monthly and note any new movement. Good drainage around the house, such as French drains or proper gutter slopes, can prevent future issues. Simple actions like keeping heavy loads off the ground floor and avoiding landscaping too close to the foundation also help.

In short, catching foundation trouble early saves you time, stress, and money. Use the visual cues, measure cracks accurately, get a professional opinion when needed, and pick the repair method that fits the severity and your budget. With the right approach, you can keep your home stable and safe for years to come.