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Flat Roof Replacement


Flat roof replacement is the comprehensive process of removing and replacing an existing flat roofing system. The reason for this is normal either the roof has reached the end of its lifespan or it has sustained irreparable damage. The process of a flat roof replacement involves the removal of all of the old roofing system. This includes; membranes, insulation, and often the decking. This is followed by the installation of the new flat roofing to create a weatherproof and structurally sound roof covering. The need for a flat roof replacement can be caused due to factors such as leaks, extensive wear and tear, or when the existing roofing materials are no longer effectively protecting the building below. The introduction of a flat roof replacement provides an opportunity to upgrade the waterproofing of the building below. This is achieved with modern, energy-efficient materials which ensure the long-term integrity and waterproofing performance of the structure. Like any roof the proper installation and regular maintenance are essential to maximise the lifespan of the flat roof.


We are one of the UK's leading flat roofing contractors and provide a complete flat roof replacement service. We are able to give you the best advice on whether there is anyway to save your existing flat roof. We will always explore every opportunity to give you the most cost effective solution. We are fully accredited in all the major flat roofing systems. Our highly-experienced team covers all of London and the South of England, and are fully accredited flat roofing specialists.

If you would like a quotation or any information on flat roofing please get in touch with us or call us now on 01277 375 511.

A flat roof is not really flat, there is actually a slight angle or pitch. Without some type of pitch, there would be no place for water to go. When water cannot drain, it forms pools, these pools eventually compromise the roofing material, resulting in leaks.

Everything you need to know in regard to flat roof replacement, including if it can be salvaged by a repair or overlay is covered in this guide.

The Pros and Cons of Flat Roof Replacement

When contemplating a flat roof replacement or repair, you need to weigh the pros and cons.

Flat Roof Repair Pros

• The pros of repairing a roof versus replacing it, is basically the cost. It will not be as expensive to repair the leaks and damage.

• Additionally, when you have a roof repair done, there is not as much waste removal as with a replacement.

Flat Roof Repair Cons

• The cons of repairing a roof are those issues can resurface and create more extensive damage

Flat Roof Replacement Pros

•A completely flat roof replacement on the other hand guarantees the home’s protection from future damages.

• In addition, having a new roof put on will improve curb appeal and increase the value of the home.

• Having a complete flat roof replacement gives the homeowner the chance to upgrade to a better-quality of roofing material.

Flat Roof Replacement Cons

• The cons of a flat roof replacement are costs. Replacing a roof involves a lot more money than simply repairing and patching the existing roof.

The Cost of Roof Replacement

The overall cost of replacing or repairing a flat roof is based on what type of materials you decide to use. In addition to materials, the labor cost is also factored into the total cost of a roof repair or replacement.

A flat roof replacement will typically cost between £100 and £140 per square metre. These costs may rise further if insulation is required.

What Affects Replacement or Repair Costs

When you are planning to replace or simply repair a flat roof certain circumstances can affect cost. If you are not careful, these circumstances can make the cost of repair or replacement really skyrocket!

Rotting Wood

You have no choice but to replace a flat roof with rotting wood underneath. Often, using an inexpensive ply or chipboard is used as a short-term, cheap method to fix the issue. 

When Water is Pooling

When instead of running off in the gutter, water is pooling on your flat roof, you have a pitch issue. Even a flat roof has a pitch. When this pitch has been altered, it does not allow water to flow into the gutter, instead, it forms pools.

Fortunately, fixing an issue with a flat roof’s pitch doesn’t cost much money. You only need a few inches of wood to repair the problem. It is imperative for you to inquire with a professional roofer who knows how to elevate the roof correctly. Because water can create serious damage quickly, it is urgent you correct the problem.

Other Expenses Involved in Flat Roof Replacement

There is such a broad range of elements that go into determining the cost of flat roof replacement and repair. For instance, you might want to add chippings or stones instead of the appearance of felt alone. Using this option will guard the felt from the sun’s ultraviolet rays as well as extend its overall life. If you need a flat roof replacement on an extension, you need to factor in the added expense of insulation.

Beware of Illegitimate Contractors

It can be difficult to determine whether the contractor you hire is legit or not. A roofer can appear to be honest and know how to do the job, however, there are many out there who are not. A good contractor will ensure all roofing materials, and wood is covered with a tight seal. There will not be any felt left out of place, nor simply use liquid tar to seal the roof. Roofers that do are not doing a quality job. Liquid tar only ensures one or two years before it begins to split and crack and allows water to leak in.

Final Thoughts

We hope this guide will enable you to make the best choice to meet your roofing needs. To ensure you get the best flat roof replacement or repair available contact a reputable roofing contractor today for a quote. After all, the roof is what protects your home and the people inside!

Frequently Asked Questions

What happens during a roof replacement or repair?

The first step is having a contractor assess the condition to determine whether a complete replacement is needed. The roofer will eliminate any rotting wood, felt, and stone chipping before the new roof installation. Once the old roof is removed, new underlay, felt, upstands, and drip edge is fitted to the existing wood decking. Talk to the contractor about future plans for waste removal when the job is finished.

Is a flat roof replacement or repair better?

Having a flat roof replacement done usually saves money over time because you will avoid added damage and repair costs. In addition, there are several perks to a new roof, such as giving your home a better appearance.

How can I save money with a new flat roof?

With proper cleaning and maintenance of your new flat roof, you will be able to save money. A leaky roof can cost you lots of cash when you have to replace items that have suffered water damage.

Get In Touch With RJ Evans Today

If you would like a quotation or any information on a flat roofing issue please get in touch with us through our contact form or call us now on 01277 375 511. One of our friendly team of flat roofing experts will be happy to help you.