Is It Normal for a Garage Roof to Have Small Leaks in Winter?

As temperatures drop and winter weather sets in, many homeowners notice damp patches or minor drips inside their garages. While it might seem common, even “small” leaks are not something that should be ignored. At KAD Roofing Bircotes, we often receive calls from property owners in Bircotes, Nottinghamshire, asking if these small winter leaks are normal — and the short answer is no. A leak is always a sign that water has found a way through your roof’s protective layers, and left unresolved, it can develop into a more serious problem.

Understanding Why Leaks Occur in Winter

Garage roofs are particularly prone to issues during cold, wet months due to temperature fluctuations and increased rainfall. These factors can cause minor weaknesses to become more visible.

1. Expansion and Contraction of Materials

When temperatures fluctuate between freezing and mild, roofing materials expand and contract. Over time, this movement can loosen joints, crack sealants, and create small gaps that allow water to penetrate.

2. Heavy Rainfall and Snow

Winter in Bircotes, Nottinghamshire, often brings extended periods of rain and occasional snowfall. Flat or low-pitched garage roofs struggle with drainage, meaning water may pool for longer periods and eventually find its way through worn felt, tiles, or flashing.

3. Blocked Gutters and Drainage Points

Debris like leaves and moss tends to build up during autumn. When gutters or outlets become blocked, rainwater can back up onto the roof, overwhelming weak spots or joints.

4. Ageing Roofing Materials

Older garage roofs, particularly those covered with traditional felt or asbestos cement sheets, naturally lose their water-resistant properties over time. When these materials age, small leaks can quickly appear — especially under the strain of winter weather.

Why Even Small Leaks Shouldn’t Be Ignored

It’s tempting to dismiss a minor drip or damp spot as “normal” winter behaviour, especially if the garage isn’t used for living space. However, even a small leak is an early warning sign that your roof’s protective layers are compromised.

Ignoring it can lead to:

• Structural damage – Prolonged moisture can rot timber supports and corrode metal fixings.
  
• Worsening leaks – What starts as a slow drip can spread as water weakens surrounding materials.
  
• Mould and damp – Moist environments promote mould growth, which affects air quality and can damage stored items.
  
• Reduced insulation performance – If your garage is insulated, trapped moisture can ruin the insulation layer, increasing energy loss.
  

At KAD Roofing Bircotes, we often find that what homeowners believe to be a “minor” issue has already caused hidden damage beneath the surface.

Common Causes of Garage Roof Leaks

Understanding where the problem originates is key to preventing it from recurring.

1. Damaged Flashing

Flashing seals the joins between roof surfaces and walls or chimneys. When it cracks or lifts due to frost or wind, it leaves the roof exposed to water ingress.

2. Cracked or Blistered Felt

Felt roofs are particularly susceptible to wear and blistering during hot summers, which then split during the colder months. These small cracks become direct entry points for rain.

3. Poor Drainage or Ponding Water

Flat roofs must be installed with a slight gradient to allow water to drain. If pooling occurs, water pressure can break down the surface over time.

4. Condensation and Poor Ventilation

Sometimes, what looks like a leak is actually condensation caused by trapped warm air meeting the cold roof surface. While this isn’t a “leak” in the traditional sense, it’s still a sign that ventilation improvements are needed to prevent moisture build-up.

Preventing Winter Roof Leaks

Garage roofs, like any other roof, benefit from proactive care. The following maintenance steps can help prevent winter leaks:

• Clear gutters regularly to ensure water can flow freely.
  
• Inspect flashing and joints before the colder months begin.
  
• Trim overhanging trees to reduce debris and prevent moss growth.
  
• Check for pooling water after heavy rain — it’s an early sign of drainage issues.
  
• Schedule professional inspections once a year to spot hidden weaknesses.
  

KAD Roofing Bircotes provides thorough roof checks for homeowners across Bircotes, Nottinghamshire, ensuring small issues are repaired before they escalate into larger concerns.

The Role of Professional Roof Repairs

While some property owners attempt DIY patching, it’s not advisable when dealing with leaks. A professional roofer can accurately identify whether the leak stems from surface damage, structural weakness, or poor installation — and ensure it’s repaired using the correct materials.

Professional attention not only resolves the immediate problem but also strengthens your roof for future seasons. Whether your garage roof is flat, tiled, or corrugated, our experienced team at KAD Roofing Bircotes ensures all work is done to withstand the challenges of the British climate.

Conclusion

No, it isn’t “normal” for a garage roof to have small leaks in winter — it’s a sign that the roofing materials or drainage systems are under strain. While these leaks may start small, they rarely stay that way. Taking quick action prevents further deterioration and protects both the structure and the contents of your garage.

KAD Roofing Bircotes, serving Bircotes, Nottinghamshire, specialises in identifying and repairing garage roof leaks efficiently and professionally. With timely maintenance and expert care, your garage can stay dry and secure throughout the harshest winter conditions.

Call us on: 01302 490 889
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