Four Myths About Green Roofs – Busted | Green Roof Benefits UK
Green roofs are no longer just an architectural trend — they’re becoming increasingly popular across the UK, from city office blocks to garden roofs, sheds, and home extensions. Yet, despite their growing popularity, there are still plenty of misconceptions that make property owners hesitate.
In this blog, we’re tackling four of the most common myths about green roofing — and showing you why they’re more accessible, affordable, and beneficial than you might think.
Myth 1: Green roofs are too heavy for most buildings
This is one of the biggest misconceptions. The truth? It depends on the green roof system you choose and the building itself.
There are three main types of green roof systems:
Intensive green roof (the heaviest, with deeper soil and the ability to support trees and shrubs).
Semi-intensive (medium weight, often with grasses and wildflowers).
Extensive green roof (lightweight systems with shallow soil and hardy plants like sedum).
Most sheds, garages, and house extensions are perfect candidates for extensive green roofs. Our modular sedum roof trays weigh just 55kg/m² when saturated, making them suitable for many roof types — whether flat or pitched.
Of course, weight isn’t the only factor. The age and condition of the building also matter. An older property or one that hasn’t been maintained may need some structural reinforcement before a green roof installation can go ahead. That’s why it’s always wise to consult a structural engineer.
Automatically assuming your roof can’t handle a living green roof is a myth. With the right system, an understanding of the building’s condition, and professional guidance, even a simple shed green roof is possible.
Myth 2: Green roofs are difficult to maintain
Not true — especially if you pick the right system.
The maintenance needs of a green sedum roof depend on a few factors: the type of system installed, the plants used, the location, and even the local climate. Intensive green roofs (with deep soil and larger plants) require more care, much like a traditional garden. But most domestic projects in the UK — such as a green roof garden shed, garage, or extension — use sedum living roof systems, which are designed to be low-maintenance.
So, what does maintenance actually involve?
Bi-annual inspections: Check your roof in spring and autumn to remove any unwanted weeds, check drainage outlets, and keep everything looking fresh.
Watering: During prolonged heatwaves, your roof will benefit from extra water. Sedum and alpine plants are hardy and drought-tolerant, so in normal conditions they thrive without regular watering.
Debris removal: Keeping leaves or branches off the roof (particularly if near trees) prevents shading and damage.
At Sedum Green Roof, our modular green roof trays make maintenance even simpler. The tray system prevents soil erosion and slumping, keeping everything neat and stable, while the diverse mix of roof plants provides resilience against pests and weather extremes.
In short, if you choose the right design, a living roof is not difficult to maintain at all. It just needs a little TLC now and then — far less than many people imagine. Myth busted!
Myth 3: Green roofs are too expensive and not worth it
Yes, a green roof may cost more upfront than a traditional roof, but the long-term green roof advantages far outweigh the initial spend.
Think of it this way: a green roof is an investment, not just an expense.
Energy savings: By improving insulation, a green flat roof helps regulate indoor temperatures, reducing heating bills in winter and cooling costs in summer.
Longevity: A conventional asphalt roof might last 15–20 years, but a well-maintained sedum roof can last 30–40 years — potentially double the lifespan.
Reduced maintenance costs: Green roofs protect the waterproof membrane underneath from UV radiation and temperature fluctuations, meaning fewer costly repairs.
Property value: Studies have shown that homes with green roofs can increase in value by up to 16%. Not only does it make your property more attractive to buyers, but it also makes it stand out in a crowded housing market.
And let’s not forget the eco roof benefits — like reducing rainwater run-off and supporting biodiversity — which add to the overall value for both the property owner and the community.
When you add up the savings, the durability, and the environmental impact, the myth that green roofs aren’t worth it simply doesn’t hold up.
Myth 4: Green roofs are just for eco-warriors and architects
This one couldn’t be further from the truth.
Green roofs used to be seen as niche, reserved for architects chasing design awards or eco-conscious trailblazers. But today, they’re mainstream. From small green roof shelters and green roof garages to residential extensions and commercial projects, they’re appearing everywhere in the UK.
Why? Because the benefits speak for themselves. Green roofs provide insulation, reduce flood risks, increase biodiversity, and look fantastic. Local councils even encourage their use in new developments as part of sustainable building strategies.
And thanks to simple, modular systems like our sedum roof kits, installing a green roof is easier than ever — no need for complex construction. Whether you’re interested in a green roof garden, a garage, or a house extension, there’s a solution to fit.
So no, green roofs aren’t just for architects and eco-warriors — they’re for anyone who wants to enjoy the practical and aesthetic green roof benefits.
Conclusion
So there you have it — four green roof myths, busted!
Green roofs aren’t too heavy, too expensive, or too difficult to maintain. And they’re certainly not just for a niche group of enthusiasts. Whether you’re planning a shed green roof, a green garage roof, or a full home project, the benefits are clear: long-term savings, improved biodiversity, and beautiful living spaces.
Thinking about green roof installation? Contact us here for expert advice and support.
