Understanding the Importance of Insulating Replacement Flat Roofs

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Maguire Brothers - Insulating Replacement Flat Roofs

In the world of building regulations, change is constant. One area where regulations have seen a significant shift is in the replacement flat roofs. In the past, refurbishment work, including flat roof replacements, often slipped under the regulatory radar. But not anymore!

The New Rules

Now, if you’re planning to refurbish more than a quarter of your flat roof, building regulations in England and Wales demand an upgrade to the existing insulation. Of course, there are exceptions, like listed buildings or situations where upgrading insulation is impractical. But for most cases, compliance is the key.

Understanding Flat Roofs

According to the regulations (BS6229:2018), a flat roof is defined as having a slope of 10 degrees or less. So, if your roof fits this criterion, you’re in the flat roof territory.

Introducing the Warm Roof

When it comes to insulation, one common approach is the ‘warm roof’ method. Here, insulation is laid over a vapour control layer, which sits atop the existing roof deck. This setup keeps the roof structure cozy, maintaining a consistent temperature year-round. This stability helps reduce thermal stress on the new roof membranes, ultimately extending the roof’s lifespan.

Choosing the Right Insulation

Rigid insulation boards are the go-to choice for warm roofs. These boards provide solid support for the waterproofing membranes laid on top and can handle occasional foot traffic. Plus, if you’re looking to improve drainage, these boards can be tailored with a taper to create the necessary slopes.

So, this should give you a good overview of the importance of insulating replacement flat roofs. By upgrading to meet current regulations, you’re not just checking a box – you’re investing in the longevity and performance of your roof. And with the warm roof method and quality insulation boards, you’re setting your roof up for success.

This article, as with all other articles we produce, is for guidance purposes only. It does not constitute formal advice and should not be relied upon as such. For bespoke, unbiased advice relating to your commercial roofing project please contact us and we would be pleased to assist.

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