Frequently Asked Roofing Questions Answered By Expert London Roofer

 

What is a flat roof?

A flat roof is a roof that has a slight slope to allow water to drain. They are typically less than 10 degrees and are commonly used on commercial buildings and some modern residential buildings because of their cost-effectiveness. There are different types of flat roofs, including warm and cold. Some materials we may use include felt and asphalt. Learn about how we install flat roofs.

 


 

How much does a flat roof cost in London, UK?

The cost of a flat roof in London varies depending on the materials used, the size of the roof, and labour costs. N.H.R.B.S. offers competitive, transparent pricing, including a 10 year insurance-backed guarantee on all roof replacements.

 


 

What is a pitched roof?

A pitched roof has a steep slope, typically greater than 10 degrees, and is designed for efficient water run-off. It is a common choice for residential properties in London and around the UK, providing excellent durability as well as potentially offering space for an attic or loft.

 


 

Do you need planning permission for a pitched roof?

In most cases, replacing or modifying a pitched roof on an existing building does not require planning permission. However, when replacing more than 25% of a roof, we are required to inform the local council with a building notice, which we will handle for you. You will then receive a a building control compliance certificate from council after they check our work. If you have a historical listed building and have concerns, we have extensive experience working on these type of properties and can advise you.

 


 

How do you install lead flashing on a pitched roof?

Lead flashing is installed by cutting grooves into the mortar joints, inserting the lead, and securing it with clips or wedges. The flashing is then dressed into the roof's surface and sealed to ensure it is watertight. Lead is a durable material, making it ideal for roofing. Learn more about how we use lead for our roofs.

 


 

How do you calculate the pitch angle for a roof?

To calculate the pitch angle, you need to measure the "rise" (vertical height) and "run" (horizontal length) of the roof. Divide the rise by the run, and then take the inverse tangent of the result to find the angle in degrees. We are experienced at this and always confirm our calculations before beginning construction of your roof replacement. Read more about our quality policy to find out about our workmanship.

 


 

Do I need special permission to repair or replace the roof on a listed building?

Yes, listed buildings in the UK are protected by strict regulations, and you may need approval from your local planning authority before carrying out repairs or replacements. Our team can guide you through the process and ensure all work meets legal requirements.

 


 

What materials are used for listed building roof repairs and replacements?

We use traditional materials such as Welsh slate, clay ridge tiles, lead for flat roofs and gutters, and lime render on brickwork to preserve the historic character of the building. Our expertise ensures that any repairs or replacements blend seamlessly with the original structure.

 


 

Does N.H.R.B.S. offer guarantees on listed building roof replacements?

Yes, all our full roof replacements come with a 10-year insurance-backed guarantee, giving you peace of mind that the work is high quality and built to last. Our experienced team ensures that all replacements meet the necessary requirements for listed buildings.

 


 

Why is a professional roof survey important when buying a home?

A professional roof survey helps identify any potential issues before you purchase a home, ensuring you’re aware of necessary repairs or replacements. This can prevent unexpected costs and give you peace of mind about the property’s condition.

 


 

How does N.H.R.B.S.'s roofing survey differ from other roof inspections?

Unlike many companies that rely on drone footage, we personally inspect your roof up close using ladders to provide a detailed and accurate assessment. This hands-on approach allows us to identify issues that might be missed from a distance.

 


 

Do I get the cost of the roof survey back if I use N.H.R.B.S. for repairs?

Yes, if you proceed with a full roof replacement through us after purchasing the home, we will refund the cost of the home buyers roof survey. This ensures you get the most value from your inspection.


 

 


 

 


Get Your Quote or Call Mark On: 020 7828 2181

Over 36 years of knowledge and experience in the roofing profession

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