How to estimate roofing costs

Before you embark on a roofing project, it’s important to establish how much it’s going to cost. Whether you’re in need of some repairs or a full roof refurbishment, understanding the price of each component will help you establish a budget and identify if DIY or professional installation is the right choice for you.

In this blog, we’ll explore how to estimate roofing costs, what influences pricing and the budget you’ll need for flat roofing and EPDM rubber roofs.

If you’re searching for flat roof installation, our experts at Alvadac are here to help. We take the stress out of the roofing process, offering fast and professional installation at an amazing value for money.

How are roofing costs estimated?

In the UK, the cost of roofing is usually calculated per square metre. The average price per square metre is between £70 and £100, but this price can vary depending on the provider and the complexity of the project. When you hire professionals like our experts at Alvadac, we’ll offer a free survey where your roof will be measured and the condition assessed. From here, we can give a more accurate quote of the cost for your specific roofing needs. 

There are also additional costs that can contribute to a project, such as adding insulation, drainage falls and removing asbestos to comply with UK building regulations

What affects the cost of flat roofing?

Flat roofing is considered a cost-effective and durable option for many properties, but there are a number of factors that can influence the costs.

Size and shape of the roof

Typically, the larger the roof, the more expensive the project, but the cost per square metre is often reduced, leading to greater value for money. If your roof is an unusual shape, has multiple levels or fixtures like vents or skylights, this will increase the cost of your job due to the additional time and labour required. For these more complex areas, it’s always recommended to hire an expert to ensure a completely water-tight surface. 

Roof condition

If your roof is in poor condition, this will increase costs as it will likely require more than just flat roof installation to ensure a safe and secure structure. If the existing roof cover is damaged, it will need to be removed and replaced, which incurs additional expenses for insulation and membranes. 

If there are structural issues, this is often the most expensive thing to fix and will need to be handled by an expert before any roofing materials are installed. 

Ensuring regulation compliance

When your roof is surveyed at the beginning of your renovation, all structures and components must be checked to ensure they comply Building Regulations Part L. If it’s found that your existing roof does not meet these standards, additional processes like adding insulation boards must be included to ensure your property is fuel-efficient. These additional resources will lead to increased material costs but can help you save money in the long run by reducing wasted energy and heat escaping via your roof.

The different types of flat roofing materials 

There are a number of different materials that can be used for flat roofing, and these have different price points.

EPDM rubber roofing

EPDM (Ethylene Propylene Diene Monomer) is a synthetic rubber made from oil, diene and natural gas ethylene propylene. These materials are combined and rolled into rubber sheets, which are then used for roofing. EPDM is extremely versatile and durable, with UV and water resistance. 

PVC and TPO

These plastic materials are designed to reflect heat and are also durable for use in roofing. PVC and TPO are, however, most commonly used in commercial roofing, and whilst being durable, these plastics get dirty easily, which may not be suitable for homes that want to increase curb appeal.

Modified Bitumen

This roofing is a mixture of materials including rubber, asphalt and plastic. This roofing can be self-adhering or applied with hot asphalt in order to bond to a surface. This material is durable and resilient to weather, but it is not as eco-friendly as other roofing materials. The process of installation produces dangerous fumes that are not safe to inhale and contribute to pollution. 

Out of these main materials, the most commonly preferred is EPDM rubber roofing due to its balance of durability, simplicity to install and cost-effective nature, especially in the long run. 

How to determine the cost of EPDM rubber roofing

In order to access the cost of your project, we need to use those estimates per square meter that we previously mentioned. 

  • First, you or your contractor will start by measuring your roof. This will give you a total area in m².
  • From here, any unusual shapes, extra components like insulation, roof repairs or access areas can be factored into the price.
  • Once all this information has been gathered, an accurate estimate can be given

If your roof is 20 m², you can expect to pay around £1,400 to £2,000, whilst a roof double this size at 40 m² will, of course, cost more at £2,800 to £4,000 but have an overall lower cost per square meter.

Prices can vary depending on location, with prices in the South East and London often costing more than up North. When hiring a professional, you also need to be aware that labour costs are factored into the estimate for fitting rubber roofing. If you want a professional job that’s made to last, time and labour costs are also included in an estimate.

Although this is the average estimated cost for flat roofing, we’re dedicated to ensuring customers get the best value for money at Alvadac. When you enquire about our roofing services, we’ll work with you to help find the right roofing solution that suits your budget and needs. 

Ensure accurate estimates and value roofing with Alvadac

In order to ensure accurate roofing quotes, the materials needed, labour costs and condition of your roof all need to be carefully considered and assessed by an expert. Although EPDM rubber roofing is one of the most cost-effective options for flat roofing, the actual price of your project will depend on a number of different factors, including the complexity of the project and the different materials needed.

Here at Alvadac, we’ll give you a clear and concise breakdown of your project so you can understand what your money is going towards.

Whether you’re looking for flat roofing supplies to fit your own roofing or want to invest in professional installation, we’ll work with you to ensure you have a solution that suits your budget. Get in touch today, and our team will be happy to help!

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