Does Metal Roofing Insulation Increase Heat Efficiency?

Metal roofing is an increasingly popular investment amongst property owners, not only because of its renowned aesthetic appeal, but also thanks to its exceptional performance benefits.

By investing in metal roofing insulation, you can enhance these performance benefits even further.

Whether you’re installing a new metal roof, or you already have one on your property, metal roofing insulation is a fantastic investment, as it dramatically increases the heat efficiency of your roof, and ensures you’re getting the maximum return from your investment.

If you’re weighing up adding insulation to your metal roof, keep reading. Below, we’ve outlined your options for metal roof insulation, the benefits it brings to your roof, and how it improves heat efficiency throughout the year.

What are the benefits of insulating a metal roof?

By insulating your metal roof, you can unlock a long list of key benefits.

These include:

• Achieving higher energy efficiency standards (more on this below)
• Keeping your energy bills down (including both heating and cooling costs)
• Giving your property greater temperature regulation
• Enhancing comfort levels within your home
• Reducing your carbon footprint
• Increasing the value of your property
• Adding resale value to your property
• Reducing the risk of damp (and roof damage caused by excessive moisture)
• Increasing sound insulation
• Maximising your roof’s lifespan

How does insulating a metal roof improve thermal efficiency?

One of the biggest advantages of metal roofing insulation is its ability to dramatically improve the roof’s thermal efficiency.

Insulation has such an impact on metal roof efficiency because it significantly reduces heat transfer within the roof.

Metal is naturally a very good heat conductor. This means that it can readily absorb heat during the summer, and transfer heat to the surroundings during the winter. So by adding insulation, you can reduce conductive heat transfer, and minimise the rate at which this thermal exchange happens.

During the winter, insulation locks heat in the property, and creates an extra barrier preventing heat from leaking out into the surroundings.

Then during the summer, not only is heat transfer reduced (preventing excessive heat from reaching the interior of the property), but you can also add reflective insulation materials to your roof. That way, heat is actually radiated away from the roof, back into the surroundings.

By reducing the rate of heat exchange within the roof, insulation keeps the temperature within the property far more consistent, thereby ensuring greater comfort levels.

So, for your property’s HVAC systems, by improving insulation, you reduce the number of times that these systems will have to work overtime (and use a lot of energy!) to mitigate extreme outdoor temperatures. As a result, your property’s carbon footprint and energy bills will be significantly reduced.

What are the best ways to insulate a metal roof?

You can insulate a metal roof during its installation, or add insulation to existing roofs that have already been installed.

Insulating metal roofs can be achieved in a range of different ways. The most popular insulation methods are:

• Spray foam insulation – this insulation type is directly applied to the underside of the roof. It is designed to stick in place, along the panels.
• Fibreglass insulation – this process involves filling the attic eave with a loose-fill insulation material (cellulose and fibreglass are commonly used). This can also be known as loose-fill insulation or blown-in insulation.
• Reflective foil insulation – consists of numerous layers of foil, installed under the sheets of the metal roofing. These layers direct heat away from the property. Reflective foil insulation is commonly selected when insulating existing metal roofs.
• Rigid foam board insulation – this involves adding the rigid foam boards between the roof and the ceiling. Due to its installation method, this insulation type is not commonly used in existing roofs.
• Batt insulation – features a roll of mineral wool, which is positioned along the roof’s underside.

If you’re insulating a metal roof during its installation, then the insulation options available to you will be more varied and more flexible.

For example, you will be able to add more high performance solutions to your roof, such as installing multiple types of insulation in the one roof. One common approach is to add fibreglass insulation boards, alongside reflective foil insulation just underneath the roof. This is a fantastic way to maximise your roof’s heat efficiency even further.

If you’re not sure which type of insulation offers the best fit for your property, speak to a metal roofing specialist. They will be able to guide you through your options, and recommend a metal roofing insulation solution that achieves the best result for your property.

At Salmon Solutions, we are one of the UK’s top metal roofing contractors, specialising in the supply and installation of metal roofing and metal roofing insulation.

So, to find out more about metal roofing and its efficiency benefits, don’t hesitate to get in touch.