has the advantage of decreasing the weight of the roof covering, while ensuring that there is less side lap and overhang. A further advantage derives from the profile
of corrugation, which can be deeper and more modern than traditional sheets. Thanks to the wider metric configuration of its wave, deeper sheets are able to shed more water. As well as offering practical benefits, the build-
ing materials Michael chose for his project have contributed to its sustainability. Using corrugated sheet helped to create a thermally efficient build- ing envelope. The building is ultra energy effi- cient, with U-value ratings of 0.12 for its roof, walls and floor. The house relies on renewable and low carbon energy through the use of a heat recovery unit, wood burning stove, back boiler and solar thermal panels. This means that it does not use any oil or gas. The property’s energy effi- ciency is the reason Michael is considering apply- ing for retrospective Passivhaus accreditation. The Passivhaus Institute is leading independent research body in the field of construction con- cepts, building components, planning tools and quality assurance for buildings that achieve out- standing energy efficiency. For a building to be considered for Passivhaus certification, it must meet rigorous criteria. If a house is certified, the owner can be certain that it will have the highest standard of living comfort and extremely low energy consumption.
Ged Ferris is marketing manager at Cembrit Enq. 134
Corrugated sheeting installation – step by step
1.Cut the panels to length
Each mitre must be cut straight either by hand or using a power saw. The angle and size of mitre is governed by the end and side lap dimensions.
2. Select the accessories It is extremely important that the correct roof purlins/rail system, type of fixing and washers are selected, to eliminate leakage/corrosion and the general deterioration of the construction. It is recommended that a self-drilling Top-Fix screw is adopted.
3. Pre-drill holes
Using a tungsten carbide tipped drill at 90° angle to the sheet, drill a hole 2 mm larger than the selected fixing. The drill point should be no less than 60° to the sheet. Always drill at the ‘apex’ of the profile. For timber construction, fixings should be at least 90 mm long and 6 mm diameter, drilled at least 40 mm into the purlin.
4. Lay the panels
Place the panels directly onto purlins that are attached to the roof trusses, beginning on the outside edge. Sheets are laid from eaves to ridge, one column at a time, with the side lap corresponding to the prevailing wind direction. Do not fix sheet in the ‘valley’ or on a ‘slope’ of the profile. When used as vertical cladding, sheets should be fixed in the valley of the first corrugation in from the overlap.
5. Fix the panels Every sheet should be twice fixed at each purlin. Using a high-speed screw gun, drive in the fixing. Never hammer the fixing through the sheet – this will damage the sheet and invalidate the guarantee. To achieve watertight and weathertight seal, it is important to confirm that the sealing washer is correctly tightened. Not over tight, not too loose.
Century Stone specialise in the supply of manufactured stone cladding and natural stone cladding for all regions throughout the UK
Contact us for specialist services and advice by calling 01869 220 050. Alternatively you can email us on
info@century-stone.co.uk or visit the website
www.century-stone.co.uk Century Stone, Station Yard, Station Road, Enslow, Bletchington, Oxon, OX5 3AX
Enq. 135
32
selfbuilder & homemaker
www.sbhonline.co.uk
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