Green Roof Kits – Sedum Trays, Sedum Mats & Living Roofs

What is a sedum green roof?

A green roof, also known as a living roof, is a roof covered with vegetation growing in a specially designed growing medium. One of the most popular types is a sedum roof, which uses hardy, low-growing succulent plants.

Sedum plants store moisture in their leaves, helping them cope with periods of dry weather. This makes them particularly suitable for extensive green roof systems, which generally have a relatively shallow growing medium and lower maintenance requirements than intensive roof gardens.

Green roofs are increasingly used on garden buildings, garages, extensions and other suitable structures. A sedum roof can turn an otherwise plain roof into an attractive planted surface while helping to retain rainfall and support biodiversity.

At Intergard, we offer different options for creating a green roof, including ready-grown sedum trays, sedum vegetation mats and protective fleece.

Types of green roof products available at Intergard

1. Sedum trays 37x57cm with an interlocking system

Our 37x57cm sedum trays are ready-grown modules containing sedum plants and a specially formulated growing medium.

The trays are manufactured from recycled polypropylene (PP) and feature an interlocking design that allows individual modules to be positioned alongside one another.

The sedum mixture is cultivated using at least twelve different sedum varieties. According to the supplied product information, each delivery contains at least six to eight varieties and the trays have a minimum vegetation coverage of 95%.

Because the trays are modular, they can be handled individually. This makes them a practical option for smaller roofs and locations where transporting large rolls of vegetation would be difficult.

Benefits of modular sedum trays

• Ready-grown modules containing vegetation and growing medium.
• Convenient 37x57cm tray dimensions.
• Manufactured from recycled polypropylene.
• Practical interlocking system.
• Mixture of sedum varieties for visual diversity.
• Individual trays can be handled and repositioned.
• Suitable for DIY installation where the roof and system are appropriate.

According to the product specifications, these trays are intended for roofs with pitches from 0 to 20 degrees. Sloping roofs may require additional restraint systems to prevent movement. Always confirm the suitability of the complete installation before proceeding.

2. Sedum vegetation mats sold per m²

A sedum mat, sometimes called a sedum blanket, is a pre-grown vegetation layer containing a mixture of sedum plants.

Sedum mats can be used as part of a properly designed green roof system. Unlike modular trays, the mats do not contain a complete integrated growing medium reservoir.

A sedum blanket installation normally requires separate layers, potentially including growing medium, drainage, filtration and protection materials. The exact build-up depends on the product and the roof structure.

Benefits of sedum mats:

• Pre-grown vegetation for an established appearance.
• Suitable for a variety of domestic and commercial green roof projects.
• Creates a relatively continuous planted surface.
• Available by the square metre.
• Can be incorporated into a suitable layered green roof system.

3. Protective fleece for green roofs

Intergard also supplies green roof protective fleece covering 13m².

Protective fleece can form part of a green roof build-up, helping to protect underlying roof layers from mechanical damage, depending on the product's specifications.

It is important to understand that protective fleece is not automatically a root barrier or a waterproof membrane. Check the intended function of the product and whether additional layers are required.

What are the benefits of a sedum roof?

1. Rainwater retention and slower drainage

One of the main benefits of a sedum green roof is its ability to temporarily retain rainwater.

The plants and growing medium absorb part of the rainfall and release it gradually through evaporation and drainage. This can reduce the immediate volume of water entering drainage systems during certain rainfall events.

The actual water retention capacity depends on the depth and composition of the growing medium, the system design, recent weather conditions and how saturated the roof is before rainfall.

For technical calculations or grant applications, always use verified water retention figures for the specific green roof system.

2. Helps reduce roof surface temperatures

Vegetation can help cool a roof surface through shading and evapotranspiration. A planted layer may also reduce the direct heating of the underlying waterproofing membrane.

The extent of this effect varies with sunlight, moisture availability, insulation and roof construction.

A green roof is not a substitute for conventional roof insulation, but it can complement a well-designed building envelope.

3. Encourages bees and other pollinators

Flowering sedum plants can provide nectar and pollen for bees and other pollinating insects.

A mixture of sedum varieties offers differences in foliage, flower colour and flowering periods, creating a more varied planted surface.

Installing a sedum roof on a suitable garden shed or outbuilding can introduce an additional area of vegetation where ground-level garden space is limited.

4. Helps protect suitable roof coverings

A properly installed green roof can shield the underlying waterproofing from direct UV exposure and some temperature fluctuations.

This may benefit the long-term performance of compatible roofing systems, although the actual lifespan depends on the quality of the membrane, installation, drainage and maintenance.

For other garden building roofing options, explore our roof shingles and roll roofing.

Not every roof covering is suitable for use beneath a living roof without additional protection or modification.

5. Improves the appearance of outdoor buildings

A living roof introduces natural greenery to buildings that would otherwise have a plain roof surface.

Depending on the sedum varieties and the season, the vegetation may display shades of green, red, yellow and bronze.

This can be particularly attractive on low-level buildings whose roofs are visible from the house, patio or upper-floor windows.

6. Relatively low maintenance

Sedum plants are generally hardy and require less attention than many other types of planting.

However, a green roof is not completely maintenance-free. One or two inspections and maintenance visits per year are usually a sensible starting point.

Additional watering may be required during establishment or prolonged dry weather.

Where can you install a green roof?

Green roof for a garden shed

A green roof can give a garden shed a more natural appearance and help it blend into the surrounding garden.

Before installing sedum trays or mats, check that the shed roof can support the fully saturated green roof system, together with any other relevant loads.

Green roof for a garden storage building

Suitable garden storage sheds may also accommodate a sedum roof.

The roof structure, waterproofing and drainage must be assessed before installation. Lightweight timber buildings may require reinforcement.

Living roof for a garage or extension

Flat roofs on garages and extensions are often considered for green roof projects.

Structural capacity, waterproofing compatibility, drainage outlets and safe access are essential considerations. If you are unsure, consult a suitably qualified building professional.

Green roof for a carport or bicycle shelter

A sedum roof may also be suitable for a carport or bicycle shelter specifically designed to support the additional load.

For lightweight structures, checking the fully saturated system weight is especially important.

How many sedum trays do you need per m²?

Our modular sedum trays measure 37x57cm.

The nominal surface area of one tray is:

0.37m x 0.57m = 0.2109m².

Based on these dimensions, approximately 4.74 trays per m² are required in theory.

The table below shows approximate quantities, rounded up to whole trays.

Roof area	Approximate number of trays
2m²	10
5m²	24
10m²	48
15m²	72
20m²	95
25m²	119

These are theoretical quantities based on the stated external dimensions. The actual number required depends on the laying pattern, edge details, drainage access zones and exact system dimensions.

For a final order, use the manufacturer's laying instructions and an accurate roof plan.

How to install a sedum green roof in 8 steps

Installing modular sedum trays can be relatively straightforward once the roof has been confirmed as suitable and all necessary underlying layers are in place.

1. Check the roof's load-bearing capacity: confirm that the structure can safely support the fully saturated green roof system and other applicable loads.
2. Inspect the waterproofing: ensure the roof covering is watertight, in good condition and compatible with green roof installation. Fit suitable root protection where required.
3. Check the roof pitch: determine whether anti-slip restraints or additional edge supports are necessary.
4. Prepare the roof surface: remove debris and inspect roof edges, outlets and overflow arrangements.
5. Install the required underlying layers: follow the specified arrangement of protection, drainage and filtration materials.
6. Position the sedum trays: place the modules according to the laying plan and connect them using the interlocking system.
7. Finish edges and drainage areas: maintain the required clearances around outlets and check the stability of the installation.
8. Water and inspect the plants: follow the supplier's establishment instructions and monitor the vegetation after installation.

Safety advice: working at height presents a serious risk of falls. Use appropriate access and fall protection equipment, and employ a competent professional where necessary.

How much does a sedum green roof weigh?

The weight of a green roof depends on the type of system, growing medium depth, drainage layers, vegetation and retained water.

A dry sedum roof can weigh considerably less than the same system when fully saturated.

Always use the manufacturer's fully saturated system weight when assessing structural suitability.

Other loads, including snow and maintenance access, must also be considered where applicable.

Do not assume that an existing shed, garage or extension can support a green roof without checking its structural capacity.

What roof pitch is suitable for sedum trays?

According to the supplied specifications, Intergard's sedum trays are intended for roof pitches between 0 and 20 degrees.

However, this does not mean that every roof within this range can accommodate the trays without additional measures.

Sloping roofs may require anti-slip restraints, reinforced edges or other purpose-designed components.

Nearly flat roofs must also have suitable drainage arrangements to prevent unwanted standing water.

When is the best time to install a sedum roof?

Sedum roofs can be installed at various times of year, provided the weather conditions and supplier's instructions allow it.

Avoid installation during frost, extreme heat or other conditions that could damage the plants or make working on the roof unsafe.

How to care for sedum trays after delivery

Sedum trays contain living plants and should be handled carefully after delivery.

• Place the trays in a cool, shaded location if installation cannot begin immediately.
• Avoid leaving trays stacked for extended periods.
• Protect the plants from excessive heat and drying out.
• Install the trays on the prepared roof as soon as possible.
• At temperatures above 25°C, aim to install the trays within 24 hours of delivery, provided it is safe to do so.
• Water the vegetation after installation in accordance with the supplier's instructions.

Prompt installation helps reduce unnecessary stress on the plants and supports successful establishment.

How to maintain a sedum green roof

A sedum roof is relatively low maintenance, but periodic care is important for healthy vegetation and effective drainage.

Spring maintenance

• Inspect the overall condition of the plants.
• Remove unwanted weeds and tree seedlings.
• Clear leaves and debris from drainage outlets.
• Check edging and the stability of the trays.
• Apply a suitable green roof fertiliser if recommended.

Autumn maintenance

• Remove accumulated leaves and unwanted vegetation.
• Check that drainage outlets are clear.
• Inspect visible roof edges and system components.
• Look for damaged or sparsely vegetated areas.

Do sedum roofs need watering?

Established sedum plants can generally tolerate dry periods, but additional watering may be needed during establishment or prolonged drought.

The amount required depends on the weather, growing medium and condition of the vegetation.

Are grants available for green roofs in the UK?

Some local authorities, organisations and environmental programmes may offer financial support for green infrastructure, including green roofs.

However, there is no universal UK-wide grant that automatically covers domestic sedum roof installations. Availability and eligibility depend on the relevant programme and location.

Before purchasing materials, check whether your local council or another relevant organisation offers a current scheme.

How to check green roof funding in 6 steps

1. Contact your local authority: ask whether any current green roof or sustainable drainage funding is available.
2. Read the eligibility rules: check whether domestic properties, sheds or other outbuildings qualify.
3. Check the application deadline: some schemes require approval before materials are purchased.
4. Prepare the project details: collect roof measurements, photographs, product information and quotations.
5. Submit the application: follow the instructions provided by the relevant organisation.
6. Keep your records: retain invoices and installation photographs in case evidence is required.

For guidance on planning permission and building regulations, consult the relevant local authority or the official Planning Portal for England and Wales. Requirements elsewhere in the UK may differ.

Sedum trays or sedum mats: which should you choose?

Feature	Sedum trays	Sedum mats
Format	Individual modular trays	Pre-grown vegetation blankets
Growing medium	Contained within each tray	Usually requires a separate growing medium layer
Installation	Modules placed alongside one another	Mats laid over a prepared system
Handling	Trays can be handled individually	Depends on mat size and root development
Typical use	Modular green roof installations	Layered green roof systems

For smaller projects or roofs where handling individual modules is more convenient, sedum trays may be the practical choice.

Sedum mats may suit larger areas or projects requiring a particular layered roof build-up.

The most appropriate solution depends on the roof structure, the specified system and the installation requirements.

Frequently asked questions about green roofs

What is the difference between a green roof and a sedum roof?

A green roof is any roof designed to support vegetation. A sedum roof is a particular type of green roof planted mainly with sedum species.

How many sedum trays do I need per square metre?

For trays measuring 37x57cm, the theoretical requirement is approximately 4.74 trays per m². Actual quantities depend on the laying plan and roof details.

Can I install a sedum roof myself?

DIY installation may be possible if the roof is structurally suitable, the correct waterproofing and drainage layers are present, and safe access is available.

How much maintenance does a sedum roof require?

One or two maintenance visits per year are generally a sensible starting point. Remove unwanted plants, check drainage outlets and provide watering or fertiliser when needed.

Can a green roof be installed on any flat roof?

No. The structure must have sufficient load-bearing capacity, and the waterproofing, root protection and drainage arrangements must be suitable for the intended system.

Are sedum trays suitable for pitched roofs?

According to the supplied product specifications, these trays can be used on roofs with pitches from 0 to 20 degrees. Additional restraint measures may be necessary on sloping roofs.

Does a sedum roof stay green all year?

Sedum foliage can change colour throughout the year. Depending on the variety and weather conditions, plants may display green, red, yellow or bronze tones.

Are grants available for installing a green roof?

Funding may be available through certain local or project-specific schemes, but it is not guaranteed. Check current eligibility and application conditions before ordering.

Buy green roof supplies from Intergard

Whether you want to create a living roof on a garden shed, garage or extension, Intergard offers a practical range of sedum trays, sedum mats and green roof protective fleece.

Our modular sedum trays combine ready-grown vegetation with a convenient interlocking design, while sedum mats offer an alternative for suitably designed layered green roof systems.

Looking for other garden building and landscaping products? Explore our garden sheds, firewood racks and outdoor planters.

Wholesale sedum trays and green roof supplies

Are you a landscape contractor, roofing specialist, builder or reseller looking to purchase sedum trays or green roof materials in bulk?

Intergard welcomes trade enquiries, including full-load orders. Email info@intergard.eu with the products required, quantities and delivery address to request a tailored quotation.

Shop green roof products at Intergard and transform a suitable roof into an attractive, living green space.