Flat Roofers In South West London

Rubber roofs, fibreglass roofs and felt roofs. All work guaranteed.

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Flat roofing

Flat roofing is an ideal choice for modern homes and commercial buildings. It offers a sleek, contemporary look while providing excellent durability and ease of maintenance. Unlike traditional pitched roofs, flat roofs maximize usable space, allowing for additional features such as rooftop terraces, solar panels, or even green roofs. Thanks to advanced roofing materials like EPDM, TPO, and GRP, flat roofs now offer superior weather resistance, energy efficiency, and long-lasting performance. Whether you're looking to install a new flat roof or repair an existing one, choosing the right roofing specialists is key to ensuring quality and longevity.

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Flat Roof Replacement & Repair

Over time, flat roofs can develop issues such as leaks, cracks, and water pooling, which can compromise your building’s structure and energy efficiency. Whether your roof needs minor flat roof repair or a complete flat roof replacement, choosing professional roofing specialists ensures durability, weather resistance, and long-term performance. With modern materials like EPDM, TPO, GRP, and bitumen, you can upgrade or restore your flat roof for enhanced protection and efficiency.

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Our Expert Standards

At Knights Roofing, we will work closely with you from the initial consultation, ensuring that we exceed your expectations and create a roofing structure that lasts.

We can use felt, fibreglass and rubber flat roofing materials. We guarantee our work and offer a prompt, efficient and stress-free experience.

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Common Flat Roof Issues

Ponding water

Standing water on a flat roof can lead to leaks, structural damage, and premature deterioration. Proper drainage is essential to prevent costly repairs.

Blistering

Air or moisture trapped beneath the roofing membrane can cause bubbles or blisters, weakening the roof and increasing the risk of leaks.

Buckling

Shifts in the building structure or aging materials can cause the roofing membrane to wrinkle or buckle, reducing its effectiveness and durability.

Alligatoring

Cracking patterns resembling alligator skin occur due to prolonged sun exposure and aging, signaling that the roof may need replacement

Moss and weeds

Poor drainage and accumulated debris can lead to plant growth, which retains moisture and accelerates roof degradation.

Thermal movement

Temperature fluctuations cause expansion and contraction of roofing materials, leading to cracks, weakened seams, and potential leaks over time.

Why Choose Knights Roofing?

  • Why: Flat roofs have become increasingly popular in the London area during the last 15 years. 
  • Location: Local London Roofing Company based in Battersea
  • Reputation: Excellent Craftmanship Guaranteed – 5* Reviews
  • Expertise: Competent installation ensures your roof is set up right.
  • Quality Guaranteed: Only the highest-grade materials used.
  • Longevity: Each roof is a long-term investment, lasting many years.
  • Peace of Mind: Get a guarantee between 15-25 years, depending on the material.
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Quotation Mark

Professional service repairing our roof, good value, would recommend.

Mr Bennett, Wimbledon

Complete chimney repointing and roof repair at our property to a very high Standard.

Mr and Mrs Howe, Clapham

Repaired our lead flashing and completed maintenance work to our leaking roof, great job.

Daniel, Richmond

Frequently Asked Questions

How do I know if my flat roof needs repair or replacement?

If your flat roof has frequent leaks, visible cracks, ponding water, or signs of aging like blistering or alligatoring, it may require repair or replacement. A professional inspection can determine the best solution.

What is the lifespan of a flat roof?

The lifespan depends on the material used:

  • EPDM rubber – 25-30 years

  • TPO & PVC – 20-25 years

  • GRP (Fiberglass) – 20-30 years

  • Bitumen/Felt – 10-20 years
    Regular maintenance can extend its durability.

What are the most common issues with flat roofs?

Some of the most common flat roof problems include:

  • Ponding water (standing water that can lead to leaks)

  • Blistering (bubbles caused by trapped moisture)

  • Buckling (roof membrane shifting or wrinkling)

  • Alligatoring (cracking due to aging and sun damage)

  • Moss and weed growth (causing trapped moisture and deterioration)

  • Thermal movement (expansion and contraction leading to cracks)

How much does flat roof replacement cost?

The cost varies based on the size of the roof, material used, and labor. On average, flat roof replacement can range from £50 to £120 per square meter in the UK. Contact us for a free quote!

How long does it take to replace a flat roof?

A typical flat roof replacement takes 1 to 3 days, depending on the size and complexity of the project. Repairs can often be completed in a few hours.

How can I prevent leaks on my flat roof?

  • Ensure proper drainage to prevent ponding water.

  • Schedule regular maintenance and inspections.

  • Use high-quality waterproofing materials.

  • Fix small issues like cracks and blisters early before they worsen.

Can I install a new flat roof over my old one?

In some cases, a new membrane can be installed over the existing roof if the structure is still sound. However, if there are significant issues like water damage, a full replacement is recommended.

Do flat roofs require a lot of maintenance?

Flat roofs need regular inspections (at least twice a year) and occasional cleaning to prevent debris buildup, ponding water, and early wear. Proper maintenance can prevent costly repairs.

Do you offer free roof inspections and quotes?

Yes! Knights Roofing provides free inspections and no-obligation quotes for flat roof repairs and replacements. Contact us today to schedule an appointment!