Alumasc’s Derbigum waterproofing membrane is the only high-performance bituminous roofing membrane with a 40-year durability statement from the BBA (British Board of Agrément).

Agrement Certificate 86/1593

Whilst competitors’ durability statements are typically for 20 or 25 years, Alumasc’s Derbigum stands out for its proven reliability with a 40-year BBA durability statement, which gives specifiers and end-users added confidence as to the product’s in-service longevity.

With a proven track record of success, Alumasc’s Derbigum systems have held a BBA certificate since 1980 and offer a variety of environmentally-beneficial, sustainable characteristics: including membranes with high levels of recycled content; innovative CO2-neutralising membranes; energy efficient ‘cool’ roofs; and vegetal, non-bituminous solutions.

The original and best APP (Atactic Polypropylene) modified product on the market, more than 20 million square metres of Alumasc’s Derbigum have been installed upon a wide variety of buildings in the UK, including the Shard and Canary Wharf in London.

Click here to download your copy of the BBA certificate or call +44 (0) 3335 771 500.

Trevor Lang, Technical Manager – Roofing Division for Alumasc Exterior Building Products, explains how bituminous roofing membranes can help in the battle against global warming.

Putting ecological roofing membranes on the market is good. Designing membranes that actively purify the air and contribute positively towards reducing global warming, by battling against the most prevalent of greenhouse gases, is even better!

Helping protect the environment

Historically the positive associations between bitumen and the environment have been limited. However, Alumasc’s Derbigum Olivine changed this and shows that bitumen can indeed play a meaningful role in the battle against rising CO₂ levels in the atmosphere.

Because the amount of CO₂ in the atmosphere is hundreds of times higher than the amount of other significant hazardous compounds, such as N₂0 (Nitrous Oxide), Alumasc chose to tackle this kind of pollution actively. And, after much detailed research and experimentation, they developed the Alumasc Derbigum Olivine roofing membrane.

Whilst other so-called ‘environmentally friendly’ membranes incorporate titanium dioxide, which requires the use of either sulphuric acid or chlorine gas in its production, the Olivine in Alumasc’s Derbigum Olivine surfacing is a 100% naturally occurring and environmentally safe mineral (magnesium iron silicate) which simply requires grinding down to the right size for it to be used in this application.

So how does it work?

The purification of the air takes place when it rains, when the CO₂ is literally washed out of the air.

When the rainwater comes into contact with the olivine, an irreversible chemical reaction takes place which transforms the CO2 into three environmentally-harmless substances – water, magnesium carbonate and sand.

Research conducted by Prof. Dr. Olaf Schuiling at the University of Utrecht showed that 1kg of Olivine neutralises 1.25kg of CO₂, which means that for every square metre of Alumasc Derbigum Olivine roofing membrane 1.75kg of CO₂ is neutralised (there are 1.4kg of olivine granules per m² of Alumasc Derbigum Olivine roofing membrane).

A very durable solution

From an ecological perspective, Alumasc’s Derbigum Olivine is a very durable solution and is the only bituminous membrane to have been given a 40-year BBA (British Board of Agrément) durability statement.

Olivine is completely UV resistant, meaning that its effectiveness is not degraded when in situ by the sun’s rays, and even with natural ageing, the active compound of the olivine will still be present when the roofing membrane itself is at the end of its lifespan.

Alumasc’s Derbigum Olivine is an Atactic Polypropylene (APP)-modified product which is suitable for use in all temperature zones and has already been utilised on a number of prestigious projects in the UK, including the Shard.

For further information regarding our Derbigum Olivine Flat Roof Membrane or to request a free sample and brochure click here.

Business is brisk at Blackdown Greenroof’s Somerset nursery, based in Somerset, the plant growing nursery is at full production with many orders waiting to be dispatched to greenroof projects around the United Kingdom.

Introduction

By growing our own plant material we can manage, cultivate and ensure that the quality of the material is at it’s best before dispatching to site. Another key aspect to our service is that we are not affected by fluctuating exchange rates or cross channel traffic during the peak summer periods making us highly reliable from initial order through to final delivery.

Blackdown can also cater for any eventuality, for example, if the weather gets too hot then we can ship our UK grown material to site in refrigerated lorries. This provides the plant species with the ideal climate to keep it at its best and provide the ideal start to its green roof life. If the product is not provided with efficient and effective transit methods this can be detrimental to the survival of the product.

Wide Range of Plug Plants

Whether you want a supply & install or a supply only price we have a wide range of sedum and wildflower plugs available within the nursery, these can be delivered to site as individual trays or as bulk palletised deliveries. We are able to contract grow sedum and wildflower plug requirements – just contact our main office or contracts department for more information. If we don’t have the sedum plug species you want then we can grow it for you – just ask for costs and production schedules and we can cater for your requirements and timescales.

Propagation

We have recently installed additional propagation facilities at our Somerset based nursery that enable us to extend the germination and growing season. Our full time horticultural staff provide seven days a week care and servicing of the plants to make sure that the plug plantss are always at their best.

Maintenance & storage

Blackdown have both covered and open-air production as well as storage facilities, so if your project is delayed and you need us to store and maintain your plants before dispatch we can look after them and keep them in top condition until you’re ready for them on-site.

For more information or if you have a project that may require our green roof products please email any drawings, literature or enquiries to contact@alumascroofing.co.uk

On the 17th July 2016, five of the Alumasc team set out on a gruelling 10k race through the mud, also known as the Delamere Commando Trail to raise money to fight coronary heart disease with the British Heart Foundation.

This 10k trail is set in the outstanding Delamere Forest Park, running through multi-terrain and varying underfoot conditions. Along the way, there were sandbags to carry, Camouflage nets to crawl under and water slides to conquer.

David Luukas (second from right), Ashlea Williamson (central) and Jay Connelly (left) from Marketing, Michael Walton (second from left) from Purchasing and Chris Buckley (right) from Technical bravely completed the challenge! The race completion times are as follows:

Mike Walton = 1hr 32mins

Jay Connolly = 1hr 36mins

Dave Luukas = 1hr 44mins

Ashlea Williamson = 1hr 55mins

Chris Buckley = 1hr 55mins

The run was in aid of the British Heart Foundation. “Coronary heart disease is the single biggest killer and we are leading the fight against it.”- BHF. If you would also like to donate to this cause, in order to tackle this difficult fight, follow this link to create a just giving page http://www.justgiving.com/britishheartfoundation.

Alumasc’s Euroroof waterproofing system has been installed on the 3200 m2 roof at Hovis’ prestigious bread-baking factory in the heart of Bradford, protecting this iconic building against water ingress and helping maintain the viability of bread production at the site in Gain Lane, Bradford.

The factory’s previous roof waterproofing system had become severely compromised over time and needed replacing after multiple patchwork repairs to extend its serviceable life.

Alumasc  were chosen to design, supply and install a complete new roof waterproofing system without impacting the working of this busy food-production facility.

The first task was to take off the old mineral surfaced roof waterproofing system and prepare the existing roof deck.

A Euroroof vapour barrier was then laid to provide immediate protection for this fully operational factory, and replaced the original skylights with Naturalight Barrel Vault rooflights, so that production could be maintained without interruption.

Next, a fully engineered Alumasc PIR thermal insulation scheme was laid, before the Euroroof Rapid waterproofing system was torch applied.

Hovis Group Engineering Operations Manager commented: “We now have a high-quality roof waterproofing system protecting our iconic bread-baking factory in the heart of Bradford, where we produce our much-loved Hovis bread products”.

If you have a project that may require our products please email any drawings, literature or enquiries to contact@alumascroofing.co.uk

Planting is all about the cultivation of plants which are wind, frost and drought resistant, require very little maintenance and are self-propagating. This type of vegetation will consist primarily of sedums, but can include herbaceous plants and grasses if the substrate depth and location are suitable.

Intensive: Hard and Soft Landscaping

Intensive green roof systems are often a mixture of hard and soft elements; this may include a variety of planting types, from semi-mature trees, lawns, shrubs and herbaceous borders to vegetable beds. Substrate depths can vary from 400-1500mm. With this variety of planting an automated irrigation system is usually essential.

Ponds, paving, lighting, seating and planters can all be accommodated to suit requirements.

Semi-Intensive: Wildflower Mat, Plugs or Seed

As the depth of the substrate is typically 150-200mm on a semi-intensive system, the range of plants that can be utilised on the roof includes a variety of wildflowers, sedum, herbs, grasses and alpines in the form of mat, plugs, seeds and bulbs. A 40mm drainage layer is used to help increase and retain additional moisture for the plants. Semi-intensive green roofs can offer a more natural look to a planted roof. As with extensive green roofs, a semi-intensive green roof is not deigned to be trafficked or to have a permanent irrigation system.

Bio-diverse: Natural Habitat

Randomly graduated substrate, from 80-200mm, interspersed variably with shelter stones, aggregate piles, shallow pools and logs in conjunction with specialist seed mixes replicates specific habitats. The objective is to attract specific wildlife species, in accordance with the projects bio-diversity plan.

Sedum NatureMat1

NatureMat1 is a composite vegetated mat consisting of a biodegradable base layer, a specially formulated substrate layer and a 90% mature plant cover comprising 6 core and 13 randomly sown species (predominantly sedums), grown to maturity in Blackdown’s fields in Somerset.

Laid onto a Blackdown substrate and drainage layer, NatureMat1 is particularly suited to pitched or curved roofs.

Extensive Sedum Plug

A diverse selection of over 25 species of hardy succulent plug plants, supported by a minimum of 70mm of Blackdown’s extensive substrate and 25mm drainage layer, provides attractive plant cover with a range of colours, shapes, heights and flowering times and periods.

A variety of wild flowers, herbs, grasses, alpines and bulbs can equally be incorporated;varying the substrate depth to suit (70-150mm).

Extensive Sedum Hydro-plant

A mix of sedum cuttings, seeds, tackifier and fertiliser are applied through hydroplanting, onto the prepared Blackdown substrate and drainage layer. The plant cover will establish and grow (typically over 1 to 2 growing seasons) to deliver the long-term benefits of a green roof. Particularly suited to restricted budgets and large roof areas.

If you have a project that may require our products please email any drawings, literature or enquiries to contact@alumascroofing.co.uk

Environmental Strategy

Alumasc actively pursues sustainability in the range of products and systems offered and is committed to continuous assessment of procedures and quality control standards that monitor them.

BREEAM

Alumasc systems score highly in BREEAM ratings (notably in Section MAT5 for responsible sourcing of materials). They contribute to a very generic rating in the BRE’s Green Guide to Specification, capable of an ‘A+’ rating when installed on timber or metal decks.

Recycled Materials

Innovative production technologies enable the use of up to 30% recycled content in core waterproofing products, and our bituminous membrane systems are 100% recyclable.

Rainwater Management

A valuable contribution to Sustainable Urban Drainage Systems (SUDS) is achieved through rainwater attenuation provision within green and blue roofs, along with clean recycled rainwater run-off from acrylic coated roofing membranes.

Green Roofs

Environmental benefits derived from the use of green roofs include the reduction of the urban heat island effect, reduced levels of pollution, the provision of the natural habitat for flora and fauna, and rainwater retention.

Carbon Emissions

CO2 emissions of buildings are minimised by the use of thermal insulation, reflective ‘cool roofs’ and CO2 neutralising membranes. This contributed to the reduction of the greenhouse effect and helps specifiers to meet target emission rates.

Whole Life Cycle

Long-term new build and overlay refurbishment waterproofing solutions, including systems which will last the lifetime of the structure, greatly reduce life-cycle costs, and minimise requirements for costly land-fill.

Quality Management

Alumasc’s Quality Management System is independently audited to ISO 9001:2008. Alumasc is also accredited to the ISO 14001:2004 Environmental Management Standard.

If you have a project that may require our products please email any drawings, literature or enquiries to contact@alumascroofing.co.uk

Introduction

Adrian Culling, Technical Manager for Blackdown Greenroofs has been working at Blackdown since 2008, and has priced a lot of green roofs in that time, but recently it seems that the majority of specifications that come cross his desk are for sedum mat – why is that? In the past Blackdown regularly specify and price for sedum plugs, both systems offer advantages and disadvantages, in this article he’s tried to summarise these as briefly as possible below.

Producers

It is very difficult for any grower to guarantee that the number of species within each square metre is supplied. The grower is more likely to state the mat will be made up of a combination of their listed species. Blackdown state that they have 6 core species and additionally 13 randomly sown species present in NatureMat®. Some sedum mat growers on the continent produce mat with as little as 4 species within it.

This is because some European and Scandinavian markets prefer to have fewer species within their sedum mat. With a plug plant system, the number of species can be clearly specified by m2. It is easier to introduce additional wildflower species into a plug system than to try and ‘inter-plug’ a sedum mat system.  Over-seeding a sedum mat system does not work, whereas, over-seeding a plug system will work i.e. over-seeding wildflower seed with sedum plugs.

Installation

Aspect

With a plug planted system the aspect of the roof i.e. its orientation and therefore the amount of sunlight or shade that the greenroof receives, can to some extent, be compensated for by the species of sedums chosen to be included on the roof. A blanket system does not offer this degree of flexibility when it comes to dealing with shaded areas.

Customization

Blackdown grow over 25nr different types of sedum and sempervivum in plug form – this enables Blackdown to customise the composition of planting on a greenroof.  Given sufficient time Blackdown can grow to order additional species of sedums – for further information contact us.

Blackdown would only recommend that a sedum plug system be installed up to a max pitch of 25 degrees, above this a sedum mat system should be specified.

Aesthetic

The greater variety of plug plants that are included within a plug system will only enhance the aesthetics of a green roof. This will help to prolong the flowering period and increase the visual interest of the green roof compared to NatureMat®, which has few species included within it.

Installation time & cost

A sedum plug system will take slightly longer to install compared to a mat system, however, the overall price should be cheaper due to the fact that there is less plant material being installed on the roof i.e. the GRO guidelines state that a mat system has a min of 75% plant coverage, whereas, a plug system will have between 5-10% coverage on installation.

Coverage

Blackdown NatureMat® typically has a sqm coverage of 90-95% upon installation. The establishment of a plug system will take approx. 6-9 months to get to 75-90% coverage.  However, this depends upon the month of planting, level of maintenance and irrigation applied.

Lifting and Offloading

No matter which system is ultimately chosen, the materials still needs to be lifted to the roof and distributed – and as each system has the same weight and depth there is little or no advantage when it comes of on-site services.

Establishment and Maintenance

Temporary Irrigation Temporary irrigation requirements will be the same for either system i.e. they’ll be required for a period of 6-8 weeks or until the plant material is fully established. However, if the system is correctly specified & installed, neither system will require additional irrigation once the plants are established.

Maintenance

Maintenance is often considered an optional extra – this is simply not the case. As with all plant material a little maintenance goes a long way to getting the best out of the system. Maintenance requirements will be the same for either system.

Conclusion

Blackdown Greenroof sedum plug systems offer a cost effect alternative to the NatureMat system whilst providing the benefits of increased numbers of species and better aesthetics. Both systems offer very tangible advantages to customers and specifiers, so perhaps we should give the humble sedum plug more room on our roofs.

If you have a project that may require our products please email any drawings, literature or enquiries to contact@alumascroofing.co.uk

In order for you to plan your capital works programs effectively you will need to obtain stock condition information. This can only be kept updated accurately by carrying out field surveys.

This is where our knowledge and expertise can assist you.

We operate a national service of experienced area technical managers that can assist you to ensure your stock is up to DHS & HHSRS standards.

We also offer budget costing so future funding and/or investment can be identified and planned.

For further information about our products and services please CLICK HERE or call 03335 771 500.

A ‘single source’ solution can be more beneficial and will benefit the customer as this provides a more efficient supply chain. The ‘single source’ solution also helps in reducing turnaround times and overall costs.

Another major benefit is the guarantee of material working well together and to a higher, tested standard. For example, Alumasc Roofing Systems can provide the full system from vapour control layer to the cap sheet, whereas sourcing the various system components from a multitude of suppliers can cause unforeseen problems when obtaining warranties.

For further information about our products and services please CLICK HERE or call 03335 771 500.