Flat roofs are a popular choice for both domestic and commercial properties due to their modern aesthetic, ease of access, and efficient use of space. However, one of the most common issues with flat roofs is water ingress and leaks.
A leaking flat roof can cause extensive damage if left unaddressed, including structural issues, water stains, and even mould growth. Knowing what to do if your flat roof is leaking is crucial to prevent further damage and protect your property.
At Apex Roofing, we provide professional assessment and repair work for flat roofs across Newcastle-Upon-Tyne and the North East. Our expert team can identify the root cause of flat roof leaks and implement a long-term solution using high-quality roofing materials.
Signs of a Leaking Flat Roof
The first step in addressing a flat roof leak is recognising the signs. Leaking flat roofs often display visible indicators that require immediate attention. Some common warning signs include:
- Water stains on ceilings or walls
- Pooling water on the roof surface after heavy rain
- Small cracks or gaps in the roofing membrane
- Blistering, sun damage, or wear and tear of the flat roof surface
- Damaged or poorly installed lead flashing and roofing vents
If you notice any of these signs, it’s essential to contact a professional roofer for a professional assessment. Attempting to repair a flat roof leak without understanding the underlying issue can lead to poor installation, further water ingress, or even structural issues.
Immediate Steps to Protect Your Property
While waiting for a professional assessment, there are several steps you can take to minimise damage:
- Remove Pooling Water: Using a sturdy ladder and safety equipment, carefully remove standing water from the affected area. Pooling water accelerates wear and tear on the roofing membrane and can cause further damage.
- Protect Interior Areas: Place buckets or protective covers beneath leaks inside the property to prevent water stains or damage to furniture.
- Inspect the Roof Surface: Carefully examine your flat roof from a safe vantage point. Look for visible cracks, damaged roofing felt, or areas where the existing membrane is lifting. Avoid walking directly on fragile sections to prevent further damage.
Identifying the Cause of Flat Roof Leaks
Understanding the cause of flat roof leaks is essential for effective repair work. Flat roofs can leak for a variety of reasons, including:
- Poor detailing around roof edges, parapets, or roofing vents
- Worn or damaged roofing materials, including bitumen roof sealant, asphalt roofs, or roofing felt
- Sun damage leading to small cracks and weakening of the roof surface
- Heavy storms or persistent rain, which can exacerbate water pools on a poorly sloped roof
- Improper installation or poorly applied roofing membranes
A professional roofer will conduct a thorough water test and inspection to identify all affected areas. This includes measuring the roof, assessing structural integrity, and checking for extensive damage that may require a new layer of roofing material.
Temporary Repairs for Leaking Flat Roofs
While a long-term solution is preferable, temporary repairs can reduce immediate water ingress and prevent further damage. Common temporary measures include:
- Roof sealant: Applying a roof sealant or bitumen primer to small cracks or gaps can temporarily prevent leaks. Follow the manufacturer’s instructions carefully for correct application.
- Self-adhesive flashing tape: Useful for sealing joints around roofing vents, nearest walls, and other vulnerable areas.
- Roof repair kits: Fibreglass repair kits, roofing cement, or flat roof repair kits can patch small leaks until professional repair work is carried out.
Temporary measures should only be used as a stopgap. Poor detailing or incorrect application may worsen the leak, so it’s vital to contact a reliable roofer to implement a permanent solution.
Professional Flat Roof Repairs
For a lasting fix, professional roofer intervention is essential. Depending on the type of flat roof, the repair approach will vary:
Fibreglass Flat Roofs
Fibreglass flat roofs require specialist materials such as chopped strand mat, chopped strand matting, fiberglass mesh, and fibreglass resin. The repair process typically involves:
- Cleaning the roof surface and removing any debris or water pools
- Cutting a piece of chopped strand mat to fit the affected area
- Applying resin according to the manufacturer’s instructions
- Embedding the mat into the resin and allowing it to cure
- Applying a reflective coating for UV protection and long-term durability
A fibreglass repair kit ensures that the roof remains watertight and prevents further water ingress.
Asphalt or Bitumen Roofs
Flat roofs with asphalt or bitumen membranes require careful repair to avoid hot flames or naked flames that may damage the roofing surface. Repair work may include:
- Applying bitumen roof sealant or torch on roofing felt over the repair area
- Using roofing cement to fill small cracks or gaps
- Laying a new layer of roofing membrane over larger affected areas
- Sealing edges around roofing vents, nearest walls, and lead flashing correctly
Correctly applied materials prevent water ingress and ensure a long-term solution.
Concrete Flat Roofs
Concrete flat roofs can develop small cracks, leading to leaks. Professional assessment and repair may involve:
- Filling cracks with roofing cement or bitumen primer
- Applying a new layer of flat roofing membrane over the affected area
- Ensuring proper drainage to prevent pooling water and future leaks
Ensuring Long-Term Protection
Repairing a flat roof leak is only part of maintaining a reliable roof. To prevent recurring issues, consider these long-term measures:
- Regular inspections: Check for signs of wear and tear, poor detailing, or water pools
- Routine maintenance: Replace damaged roofing felt, apply roof sealant, and maintain lead flashing
- Professional installations: For new flat roofs or extensive repairs, hire a professional roofer to install roofing membranes, torch-on roofing, or fibreglass layers according to best practice
By taking proactive measures, you can prevent leaks, extend the lifespan of your flat roof, and avoid costly emergency repairs.
When to Call a Professional Roofer
After you manage to contain the leak as much as possible and limit damage to your property, it’s time to call a professional roofer. Get in touch with us as soon as you see:
- Extensive damage across the roof surface
- Water stains appearing inside your property
- Pooling water that doesn’t drain properly
- Poorly installed roofing materials or membranes
- Structural issues caused by prolonged water ingress
A reliable roofer will carry out a professional assessment, recommend the most appropriate repair work, and ensure the roof is watertight for the long term.
Flat Roof Repairs From Apex Roofing
A leaking flat roof can quickly escalate into a serious problem if left untreated. Immediate action, temporary repairs, and a professional assessment are essential to prevent water ingress, structural damage, and further repair costs. Whether your flat roof is made from fibreglass, asphalt, concrete, or bitumen, Apex Roofing provides expert flat roof repair services across Newcastle-Upon-Tyne and the wider North East area.
Our professional team uses high-quality roofing materials, including fibreglass repair kits, roofing membranes, bitumen primers, and roof sealant, to ensure a long-term solution. We follow manufacturer’s instructions, carry out careful measurements with tape measures, and apply all materials correctly to prevent future leaks.If you have a leaking flat roof, don’t wait for the damage to worsen. Contact Apex Roofing today for a professional assessment, free quote, and reliable roof repair services tailored to your property’s needs.