Flat Roof Replacement Costs in Glasgow: Average Prices & Quotes 2026

Flat roofs are commonly found on garages, home extensions, bay windows and front porches.

But how much will a flat roof cost you in Glasgow?

In Glasgow, the average cost of a flat roof is £1325, but this does depend on a few factors.

This guide will tell you what you need to know about:

• Glasgow flat roof prices
• Additional costs you’ll need to include in your budget
• Types of materials available
• How to find a flat roof installer in Glasgow

So let's get started...

How Much Does Flat Roof Replacement Cost in Glasgow?

In Glasgow, winters are often cold with snow, while during the rest of the year, it can be wet and windy.

This means that although flat roofs are designed to be durable, their lifespan is often affected by the wet and windy weather conditions.

Thanks to Scottish weather, there is a high demand for flat roof replacement in Glasgow. Flat roof replacement is a common upgrade for a Glasgow home, so it's important to understand local roof costs to budget effectively and avoid unexpected expenses.

Glasgow flat roof prices aren’t as high as in London or the South East, but you might find labour costs are higher than in the north of England or other parts of Scotland.

On average, local flat roof specialists’ prices in Glasgow are £47 per hour with a day rate of between £340 and £415. There will normally be two roofers doing the job, which you’ll also need to factor in when considering total roof costs for your project.

Costs by Flat Roof Material

Here’s a table giving you an at-a-glance comparison of the cost of the materials for a flat roof per m².

Glasgow Flat Roof Prices

Flat Roof Replacement Materials and Labour Costs in Glasgow

Costs can vary based on the roof type and the roofing materials selected, as these factors significantly influence both price and suitability for your project.

Take a look at:

• Double garage (30m²): Between £1,200 and £1,680
• Extension Roof (45m²): Between £1,800 and £2,520
• Front Porch (3m²): Between £340 and £415
• Lead roof on bay window (3m²): Between £340 and £415
• Flat roof on modern home (80m²): Between £3,400 and £4,480

Factors Affecting the Cost of Replacing a Flat Roof in Glasgow

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

• The size and shape of the roof – Materials are sold by square metre (m²) and range from £50 to £200 per m²
• The type of roofing material: Felt is the most cost-effective, but many people opt for mid-range options like rubber or fibreglass
• Labour rates in Glasgow – Expect to pay a roofer £47 per hour or a day rate of between £340 and £415.
• Accessibility and scaffolding – You’ll pay more if the roof is complex to access or if you need scaffolding. To erect scaffolding may cost around £890 to £1040 for a week’s hire.
• Removal and disposal costs of the old roof – The condition and complexity of the existing roof can affect the scope and cost of the roof replacement project. If disposal is not included, then you can hire a skip, which will likely cost around £220.
• Insulation to comply with building regulations. Building regulations state that all flat roofs must now have adequate insulation. The cost will depend on the type of insulation you choose. Prices for insulation materials range from £7 to £15 per m². Improved insulation can help reduce your energy bills and cooling costs over time.
• The type of roof needed and any major structural work, such as converting to a pitched roof or adding features like solar panels or Velux windows, can significantly impact the overall cost of your roof replacement project.
• Planning permission may be required for certain changes, especially if your property is in a conservation area. Always check with your local planning authority before starting work.

Your building can have a cold roof or a warm roof, but to meet building regulations, it must have a U-value of 0.18 W/m²K.

A cold flat roof has the insulation placed between the rafters. It is cheaper than a warm roof, but you must also install ventilation to prevent condensation caused by moisture build-up.

Insulation placed beneath the waterproof layer on the outside of the roof is called a warm roof. No ventilation is required. This type of roof doesn’t lose as much heat as a cold roof, so it is more energy efficient.

Cost of Replacing a Flat Roof in Glasgow

Prices for materials only are:

• Double garage (30m²): Between £170 and £440
• Extension Roof (45m²): Between £255 and £560
• Front Porch (3m²): Between £20 and £44
• Lead roof on a bay window (3m²): £300
• Flat Roof on modern home (80m²): Between £450 and £1,160

Labour costs at Glasgow rates:

The average cost for a roofer in Glasgow is £47 per hour, so the overall labour cost will depend heavily on the duration of the job. This includes a day rate of two roofers.

• Double garage (30m²): 2-3 days will cost between £680 and £1,245
• Extension Roof (40m²): 2-3 days will cost between £680 and £1,245
• Front Porch (3m²): 1 day will cost around £340 to 415
• Lead roof on a bay window: 1 day will cost £340 to 415
• Flat Roof on modern home (80m²): 6 to 7 days will cost between £2,040 and £3,320

Additional Costs to Consider

• Structural timber repairs: 10% to 15% of the total roof replacement cost
• Scaffolding hire: Between £850 and £1,100 per week
• Waste removal/Skip hire: Around £220
• Skylights: Between £755 and £3,470
• Emergency callouts: £100 - £300

How Long Does a Flat Roof Replacement Take?

The length of time to install a flat roof does depend on the size of the roof, whether or not it needs scaffolding and the complexity of the job. Weather can also have a bearing on the completion date, as wet weather can affect drying times and labour schedules.

But on average, most jobs will take a professional Glasgow roofer around 2 to 3 days to complete. A small job like a porch will only take a matter of hours, whereas a flat roof on a modern home can take around 7 days, and a garage will take 2 to 3 days.

Flat Roof Lifespan and When to Replace

The lifespan of your roof will depend on the material you use, how well you maintain it and the weather conditions you have in your location:

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

There are key signs that indicate your flat roof needs to be replaced.

Signs that you need a new roof include cracks and tears in the membrane, leaks, water pooling on the roof surface, and missing tiles. Any sagging in the roof could be a potential structural damage that requires urgent attention.

If you notice these issues, your roof may need to be replaced to prevent further problems.

Finding a Roof Specialist in Glasgow

Using an experienced roofer means you get a professional installation that complies with building regulations.

Use MyJobQuote to find Glasgow roofers. Post your job on the website and we’ll put you in touch with roofers in your area. Collect 3 quotes and compare each one to find the quote that suits you best.

Replacing a flat roof in Glasgow is an investment, but getting the work done before any major problems appear will save you from any expensive repairs in the future.

Post your job on MyJobQuote today and find a trader near you.

Conclusion

Flat roof replacement is a significant investment for any Glasgow homeowner, but with the right planning and professional support, it can add value, improve energy efficiency, and protect your property for years to come.

By understanding the costs involved, from materials and labour to additional features like insulation and skylights, you can budget wisely and avoid unexpected expenses.

Whether you’re replacing an old roof or upgrading to a more energy-efficient option, always seek a few quotes from trusted roofing contractors and choose materials that suit your needs and budget.

Remember, a well-installed flat roof not only enhances your home’s appearance but also stands up to the challenges of Scottish weather. Take the time to research your options, compare costs per square metre, and invest in quality workmanship for a roof that delivers lasting peace of mind.