The roofing, roof systems and timber blog by Marley Eternit is a valuable resource to provide you with expert advice and helpful tips on your projects.
17 May 2018
The importance of preparing UK roofs for extreme weather
The snow storms this winter have certainly been a test for the weather resistance of pitched roofs in the UK and have further highlighted why high quality dry fix systems are essential to make sure roofs are prepared for future extreme weather events.
We may be approaching the summer months but in some parts of the UK, homeowners are still repairing damage caused by the Beast from the East and the smaller Mini Beast storms.
11 April 2018
What is BS 5250 and how does it relate to pitched roof design?
BS 5250 - currently the 2011 edition, with an amendment in 2016 - is the code of practice for control of condensation in buildings. It provides building designers with guidance on safeguarding the health of occupants by considering likely sources of moisture, avoiding the build up of excessive moisture, and preventing mould growth and condensation.
What are the sources of moisture?
Moisture can be generated internally by building...
09 April 2018
Changes to BS 5534: what roofing contractors need to know
Roofing contractors can expect to see pitched roof specifications quoting an amended version of the already-familiar British Standard (BS) 5534, as well as the brand new standard BS 8216.
Their introduction is intended to combat current poor installation of dry fix pitched roof products, and increase confidence that building owners are being provided with durable, weathertight roofs, both new and refurbished.
Why have new standards been ...
04 April 2018
Changes to BS 5534: what specifiers need to know
As a code of practice, British Standard (BS) 5534 provides recommendations on the slating and tiling of new and repaired pitched roofs, and vertical cladding.
Prior to 2015, specifiers might not have given much thought to the application of its guidance. For many projects, the roofing contractor would be responsible for the installation and fixing of the selected roof covering.
A system approach to pitched roofs
Significant revisions to BS 5534 i...
03 April 2018
What lap treatment is required for fibre cement sheeting?
When installing profiled fibre cement roof sheeting, the type of lap and sealing treatment to be used, either sealed or unsealed, depends both on the expected wind loading conditions, which vary in different regions of the UK, as well as the roof pitch. Minimum end laps for fibre cement roof sheeting range are either 150mm or 300mm. Sheets should always be installed with 2 fasteners per sheet width per purlin or rail.
29 March 2018
Overview of changes to BS5534
The second amendment to BS 5534, the code of practice for slating and tiling, has been published to combat issues of dry fix roofing product quality and poor installation. It builds on the revisions introduced in BS 5534:2014 and clarifies points of uncertainty.
Not only will pitched roof specifications now quote BS 5534:2014 + A2:2018, they will also refer to a brand new standard. BS 8216:2018 covers the specification of dry fix products and has been written...
23 March 2018
What fixings should be used for fibre cement sheeting?
Profiled fibre cement roof sheeting should always be fixed with two fasteners per sheet per purlin and in accordance with the recommendations of BS 8219.
Selecting the correct type of fastener is extremely important for the integrity of the roof covering to avoid premature failure, corrosion or leaking. You should consider the type of sheet being used, as well as the type of purlin or rail system, and the weatherproofing, with washers ...
22 March 2018
What is ‘spec busting’?
‘Spec busting’ or ‘breaking spec’ refers to situations where construction products have been specified by an architect, designer or client, but are changed before a project is carried out. The specified product is changed for one that is perceived to provide equivalent performance, either to reduce cost, solve availability problems, or simply due to the contractor’s preference.
Although the term ‘value engineering&rsq...
21 March 2018
The circular economy and roofing
In the UK, the construction industry consumes the most natural resources, and creates the most waste, of any industry. Over 400 million tonnes of materials are delivered to site annually and approximately 109 million tonnes of waste is created. This waste is not just packaging or off-cuts – as much as 13% of these materials are discarded without even being used.
With these figures, more attention is being paid to reducing waste and increasing re-use ...
28 February 2018
A roofing contractor’s guide to BS 8612
Recently, a new British Standard - BS 8612 - was launched. The development of the standard follows years of anticipation within the roofing industry.
It is hoped that BS 8612, which went into effect on January 31st, 2018, will provide clarification and guidance to professionals ranging from roofing contractors to architects and other specifiers, about the best products and systems to use when creating dry-fixed ridges, hips and verges on slate...
27 February 2018
What architects need to know about BS 8612
On January 31st, 2018, British Standard BS 8612 was published. Covering dry-fixed ridge, hip and verge systems for slating and tiling, this new standard sets out performance recommendations and expands on the existing BS 5534 (code of practice for slating and tiling).
BS 8612 was created as a response to concerns about the durability and weather tightness of some dry ridge systems. the standard aims to ensure that all dry-fixed ridge, hip and verge sys...
22 February 2018
Roofing safety in winter weather
When the temperature drops and the wintery weather arrives, it can lead to dangerous conditions on building sites. Roofing professionals are especially prone to these additional risks due to working at height in high winds and on surfaces that become extra slippery when covered in rain or snow.
But work can’t stop until the sun comes back out, so instead, appropriate steps must be taken to prevent injury and illness.
Improving safety ...