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If your flat roof needs replacing, you might be wondering how much it’s going to set you back. That’s where we come in: our roofing experts have created this comprehensive guide to help you understand how much it might cost to replace your flat roof and the factors involved in this.
These are ballpark, average figures across the UK. From company to company, the cost may differ due to material costs, labour, the size of your flat roof, and the complexity of the design. In order to get an accurate cost, it’s important to speak to specialists, such as Western Flat Roofing. Our team has decades of experience delivering outstanding results, and as a result, we’re skilled at providing our customers with roofs which provide outstanding value for money. This blog will cover everything you need to confidently plan (and understand) how much you should budget for flat roof costs.
How Much Does it Cost to Replace a Flat Roof in the UK?
In the UK, location, complexity, the roofing contractor, and materials all affect the price you might pay to replace a flat roof. But on average, flat roof replacements cost around £2,500, with the cost per square metre being £70 to £150, including additional costs like labour and material.
It’s hard to give you an in-depth estimate without looking at what goes into a flat roof replacement, so let’s have a look at a cost breakdown of what goes into replacing your existing roof.
What’s Included in the Final Price of a Flat Roof Installation?
Generally, the final flat roof cost includes the flat roof removal costs, surface preparation, the materials, labour, and finishing touches (sealants and flashings). All of this will allow them to create the new roof which suits your property.
A flat roof extension, or replacement cost, will not usually include complex designs, like skylights, extra time needed if there is restricted access, and the disposal of hazardous materials (like asbestos), so these will be extra.
We recommend getting multiple quotes from different companies to get the best idea of the cost in your area.
The Factors Behind a Replacement Flat Roof Cost
Flat Roofing Materials & Their Cost
Materials account for around 60% to 70% of the costs when it comes to getting your flat roof replaced. From a felt flat roof to a green roof, the cost varies: this can sometimes be a sign of the quality of the material that you’re choosing, too.
Labour typically accounts for around 30% to 40% of the total cost of a flat roof replacement. The exact figure depends on factors like your location, roof complexity, accessibility, and the experience of the roofing contractor. Labour rates tend to be higher in areas like London and the South East, and lower in the North of England, Scotland, and Wales.
New Flat Roof Size
The size of the area you want the flat roof installed on makes a massive difference to the overall costs. Simply speaking, the larger the roof, the more materials and labour needed, making the final cost go up.
Flat roof costs are usually measured in price per M2, so a 15m2 felt roof installation would cost around £1,050 to £1500. This differs depending on the material you choose.
Overall, a smaller area will be cheaper as it uses fewer materials and will often take a bit less time. But, in terms of cost per m2, a larger roof can work out cheaper, as labour costs can become more efficient.
Other Costs Involved
Before a flat roof is installed, other costs might need to be considered. For example, roof removal is usually included in the cost, but if you’re replacing an old flat roof, it can carry extra charges for waste removal or skip hire, depending on the amount of old roofing materials and accessibility. Things like adding insulation can also add an upfront cost, but may be more cost-effective when the long-term energy efficiency is looked at.
If your existing roof deck is damaged or sagging, it may need repair or reinforcement, which adds to the replacement cost.
Scaffolding costs can vary depending on the height and size of your property, while gutter cleaning costs or replacing drainage systems might also be necessary if your new flat roof affects water flow.
For larger roofs or flat roof extensions, expect higher costs, especially when complex features like skylights or insulation upgrades are involved.
If you require a new flat roof, get in touch with our expert team, and they’ll be able to get you started on your journey.
