The roofing, timber & facades blog by Marley Eternit is a valuable resource to provide you with expert advice and helpful tips on your projects.
09 November 2016
Here we look in depth at practical steps to consider with the actual repair and replacement of individual roof tiles.
Individual tiles or slates that are damaged during or after installation should be replaced as soon as possible using a sound, matching unit fixed in accordance with the nailing and / or clipping specification. Avoid repairing damaged slates or tiles using superficial coatings, adhesives or other mechanical devices, as their performance may be limited.
In some cases, repair may n...
The updated BS 5334:2014 Code of practice for slating and tiling specifies a number of batten sizes based upon the span of the rafters and the product being used
04 November 2016
A roof is made up of a system of products working together and it’s important to be clear on the terminology, especially since the parts of a roof can be referred to in different ways.
It is not normally necessary to apply for planning permission to re-roof a house, or to retrofit rooflights or skylights. The development rules allow for roof alterations subject to the limits and conditions
01 November 2016
Here we explain in detail how to fit roof slates using the nail and rivet fixing method. If you are fitting a roof at a pitch lower than 15 degrees, use the hook fixing method, which is recommended for our Birkdale low pitch slates.
Before fitting roof slates, consideration should of course be given to the dimensions and headlap, as well as the specification of underlay and battens.
Nail and rivet fixing method for fibre cement roof slates
All slates should be fixed in accordance wi...
31 October 2016
If you are specifying timber decking there are a number of things that should be considered including legislation.
30 September 2016
Regular maintenance is crucial to prolong the lifespan of a roof and preserve its integrity. This should include inspection for broken and loose tiles, checking gutters and downpipes, and the removal of any organic material that may have built up, such as leaves, moss and lichen.
Moss and lichen tends to flourish on roofs in rural areas, where trees are nearby and where there are shady, damp conditions. Steeper pitched roofs are less likely to support moss and lichen growth as they shed water mo...
23 September 2016
Efflorescence describes white deposits found on building materials such as concrete roof tiles, block paving, clay bricks, calcium silicate bricks, mortar and concrete.
The term covers a number of phenomena and various forms can occur. The deposits found on different materials vary significantly in chemical composition and method of formation. The processes which give rise to efflorescence in clay products, for example, are different to those that affect concrete or fibre cement roofing products...
19 September 2016
Mortar has historically been the popular way to install tiles and fittings at a number of key roof areas, including roof hips, ridge and verges, but there a number of factors that cause mortar to fail, making it unsuitable in the long term.
Recent changes to BS 5534 - the code of practice for slating and tiling - have introduced some important changes to the way that roofs are fixed. In particular, mortar is no longer recognised as being suitable for providing a sole means of fixing under BS 55...
15 September 2016
Dry fix kits are available in the marketplace that can be used generically on both hips and ridges. However, some manufacturers recommend that specifiers, installers and home owners benefit the most from purpose made systems, specific to the roof area they are being installed on. Purpose-made ridge and hip systems often benefit from the inclusion of components (fixings etc.) that are specific to the roof area they are used for. In the case of some purpose-made systems, they offer additional com...
A cold roof is the most common type of roof construction, often taking the form of an uninhabited storage space. The minimum requirements for cold roof ventilation are set out in BS 5250 (Control of Condensation in Buildings) which takes into consideration span, pitch and roof area. The wider the span, the more free airflow is required in the roof space.
In cold roofs, insulation is laid at ceiling joist level, leaving the roof void colder in relative terms than the accommodation below. If moist...
Dry fix roofing accessories and fittings have developed considerably over the last couple of decades as an alternative to mortar bedding.
Dry fix systems are mechanically fixed, which is a more reliable installation method compared with the traditional method of mortar fixing. In addition to being maintenance free, dry fix ridge and hip systems also provide ventilation that are able to contribute to the requirements of BS 5250, the code of practice for the control of condensation.
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