Flat Roof Replacement Cost in Birmingham | Average Prices & Quotes

Residential areas of Birmingham have plenty of houses with garages and home extensions. And, because it’s the UK, there’s plenty of wind and rain.

Most garages and house extensions have flat roofs, as do front porches and bay windows, and this is because they are practical and cost-effective.

If you’re wondering about the cost of replacing a flat roof in Birmingham, the average cost is £1675, but reading this guide will tell you what you need to know about the cost of labour and materials, any additional costs you may need to add to your budget and how to find flat roof installers easily.

It’s important to compare multiple quotes to ensure you receive the most competitive pricing for your flat roof replacement.

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How Much Does Flat Roof Replacement Cost in Birmingham?

In Birmingham, the average rate is between £275 and £355 and installing a roof will normally take 2 professionals to complete the job.

The hourly rate for a roofer in Birmingham is about £32 to £44. Labour charges typically cover tasks such as the removal of the old roof, the installation of new materials, and finishing work, and may vary depending on the complexity of the project.

Costs by Flat Roof Material

This table gives you an at-a-glance comparison of the cost of the materials for a flat roof per m².

Birmingham Flat Roof Prices

Flat Roof Replacement Materials and Labour Costs in Birmingham

Here are some average costs of a flat roof replacement that include materials and labour:

• Double garage (30m²): Between £1,050 and £1,590
• Extension Roof (40m²): Between £1,400 and £2,120
• Front Porch (3m²): Between £275 and £355
• Lead roof on bay window (3m²): Between £402 and £426
• Flat roof on modern home (80m²): Between £2,800 and £4,240

The final price will depend on the project scope, including whether you need a complete roof replacement, partial repairs, or additional upgrades.

If you are looking for a flat roof replacement on a budget, then a felt roof is your cheapest option at between £35 and £50 per m².

Owners of bay windows often choose lead because of its durability, but this is the most expensive option at around £134–£142 per m². Other types of material, such as fibreglass, rubber and a green roof, will cost you between £38 and £150 per m².

Prices for materials only are:

Prices can vary depending on the roof types involved, such as garages, extensions, or bay windows.

• Double garage (30m²): Between £170 and £440
• Extension Roof (45m²): Between £253 and £653
• Front Porch (3m²): Between £20 and £300
• Lead roof on a bay window (3m²): £600
• Flat Roof on modern home (80m²): Between £450 and £1,108

Labour costs at Birmingham rates:

• Double garage (30m²): 2 to 3 days will cost between £608 and £912
• Extension Roof (40m²): 2 to 3 days will cost between £608 and £912
• Front Porch (3m²): 1 day will cost between £275 and £355
• Lead roof on a bay window: 1 day will cost between £275 and £355
• Flat Roof on modern home (80m²: 6 to 7 days will cost between £1,824 and £2,128

For larger projects, such as full home re-roofing or jobs exceeding 80m², completion may take longer, and you may be eligible for special financing options or longer-term payment plans.

Additional Costs to Consider

When you are working out a budget for your roof replacement, remember to add on any additional costs.

These could include:

• Roof Insulation: Materials between £7 and £15 per m². Homeowners may be eligible for insulation grants, which can help reduce the upfront cost of insulation upgrades.
• Scaffolding hire: Between £800 and £1,000 per week
• Waste removal/Skip hire: Around £220
• Roof windows/Skylights: Between £755 and £3,470
• Emergency work/Same day callouts: £100 to £300

Factors Affecting the Cost of Replacing a Flat Roof in Birmingham

There are several factors that will affect the total cost of replacing a flat roof in Birmingham, and they include:

• The size of the roof – Materials are sold by square metre (m²). Prices vary, typically ranging from £35 to £150 per m^2.
• The type of material: Whether you choose a cost-effective felt or the more expensive fibreglass, or something in between, prices vary depending on your selection.
• Labour rates in Birmingham. Per day, the rate is between £275 and £355 for installing a roof. The hourly rate for a roofer in Birmingham is about £32 to £44.
• Complexity of the installation: Is access easy, or is scaffolding required? The scope of roofing work, including any required permits or surveys, can affect the cost. The cost of scaffolding on average is between £800 and £1,000 per week.
• Condition of the old roof: Does it need removal and disposal? Assessing and potentially repairing underlying structures can impact the total cost. Skip hire costs on average £220.
• Insulation to comply with building regulations

Condition of the Old Roof

If your old roof isn’t sagging, leaking or pooling water, then you may be able to install a new flat roof on top of the old one (sometimes referred to as the current roof). Skip hire will add around £220 to your overall costs.

A roof in poor condition, though, may have to be removed, and this should include the removal and inspection of the existing roof in the quote from the roofer. What might not be included is disposal.

Insulation to Comply with Building Regulations

Although laying a new flat roof doesn’t need planning permission (unless you live in a listed building or in a conservation area), there will be conditions under building regulations which your roofing contractor should adhere to.

Insulation is sometimes required on new or replacement flat roofs unless it covers an unheated building like a detached garage.

The location of the insulation depends on whether you choose to have a cold or a warm flat roof.

Insulation is placed between the rafters in a cold flat roof, which is less expensive to install, but it must also have adequate ventilation to prevent moisture build-up and condensation.

The insulation in a warm flat roof is placed beneath the waterproof layer on the outside of the roof. It doesn’t need ventilation, and less heat is lost to the outside, so it is more energy efficient.

Upgrading your loft insulation at the same time as a flat roof replacement can further improve energy efficiency, help reduce heating costs, and ensure compliance with building regulations.

How Long Does a Flat Roof Replacement Take?

On average, most jobs will take a professional Birmingham roofer around 2 to 3 days to complete. Delays are usually caused by bad weather.

Scheduling flat roof replacement in early spring can help avoid peak demand, resulting in faster completion and better availability of contractors. Larger jobs that need scaffolding or are difficult to access may take longer. Materials also need time to dry or cure.

Flat Roof Lifespan and When to Replace

If a roof has a lot of water pooling on its surface, or large cracks or tears in the material, then the roof will probably need replacing. If you have minor damage that isn’t causing too many problems, then it may just need a repair.

However, before installing new roofing materials, it is important to complete any necessary repairs to the underlying structure to ensure durability and waterproofing.

Most homeowners will eventually face the decision to repair or replace their flat roof, as most roofs have a limited lifespan and are affected by weather conditions over time.

In some cases, re-roofing can be a cost-effective option to improve energy efficiency and extend the life of the roof. If your roof has become discoloured, replacing tiles can restore its appearance and enhance your home's curb appeal.

A complete roof replacement is necessary when there is severe damage, such as after a major storm, or when the roof has reached the end of its lifespan. Roof replacements offer long-term benefits, providing better protection and reducing the need for repeated repairs.

Typical lifespans for flat roofs are:

• Felt: 10-30 years
• EPDM: 25-30 years
• Fibreglass (GRP): 20–30 years
• Lead: 100 years plus
• Green Roofing: 30–50 years

Keep in mind that actual lifespans can vary depending on weather conditions in Birmingham, such as heavy rain and wind, which may impact the durability and longevity of flat roofs.

Finding a Roof Specialist in Birmingham

Consider replacing your flat roof before problems get more serious and water penetration ends up ruining valued possessions or expensive items of furniture.

The easiest way to find flat roofers in Birmingham is to use MyJobQuote. Post your job description on our website, and you’ll be matched with roofers in your local area.

Get at least 3 quotes and compare each one to find the one that suits you best. Using an experienced roofer means you don’t have to worry about building regulations or getting the work done to a professional standard.

Choosing professional roofing services ensures high-quality workmanship and peace of mind. For any concerns about your flat roof replacement, drainage requirements, or planning permission, seek expert advice from roofing specialists to make informed decisions and ensure compliance.