Typical details

Fixed Points

All standingseam roof systems require a 'Fixed Point' in the sheet, attaching the sheet to the building stucture through the halter clip with a purpose of directing the thermal movement of the standingseam sheet as it floats on the halter clips. Without a fixed point the sheets could move downslope and off the clips. On straight roofs the fixed point will always be at the uppermost halter unless there are welded details down slope. Roof wind loadings can require fixings varying from an aluminium sealed rivet to an M10 stainless steel bolt, whichever fixing is selected it needs to be fully embedded in, or penetrate, the halter. Rivets, in particular, should be double checked to ensure they are correctly seated and holding.

Ridge

When Aluminium sheets are used, you must allways fit suitable aluminium flashings to avoid ELECTROLYTIC corroision issues. The ridge flashings should be at least a 0.9mm guage and should lap over the sheet a minimum of 150mm each side- If the ridge flashing face/side exceeds 200mm, a heavier material should be used and an additional ridge zed to support the flashing.

Technical Note - Do not use steel flashings with aluminum roof sheets.

Verge

At the gable or verge of a standinseam roof the flashing detail has to allow for the thermal movement of the aluminium sheet and the thermal movement of the aluminum flashings. As the sheet lengths are not usally the same length of the barge / verge flashing the thermal movement will be different. This is overcome by the use of static and moving components to allow sufficient attachment of the flashings to the building whilst at the same tim allowing for the varied thermal movement. Where possible the setting out should allow for the final sheet to be complete and finish just short of the actual verge allowing the standard verge assembly to be used, if it is necessary to use a reduced width pan consider rip cutting, overlapping and welding the sheet in situ rather than trying to provide some other method of termination which will inevitably compromise both the movement and anchorage of the final sheet.

Technical Note - When attaching the barge flashing to the side of the building ensure you allow for its thermal movement.

Rooflights

Day lighting within rooms is not only desirable but in many instances compulsory and is often provided via roof-lighting in addition to traditional glazing. In aluminium standing seam systems such lighting can be provided by barrel vault ridge or downslope lights, sun-pipes and other individual kerb mounted units and where appropriate an "in-plane" triple skin GRP system designed to avoid penetrative fixings. All the Euroclad solutions are provided in partnership with Brett Martin Daylight Systems, form part of the Elite System with NBS specification clauses and detailed drawings available on line. The barrel vault solutions are nominally 1,200 wide, the in-plane solution 800mm wide with neither requiring any on site welding whilst individual pyramid and similar lights and sun pipes are fitted onto fabricated soaker units welded into the roof.

Architectural Welded Roof Features

Standing seam systems are fundamentally 'Non - Penetrative 'however the need to include penetrations into the roof system will often occur. Aluminium details can be Site welded to ensure the penetrations are suitably watertight. Architectural detailing is also possible - welded hips and valleys are neat as shown on the slide and can even be introduced onto curved applications. Remember that a welded penetration becomes the fixed point - care is required when detailing to avoid 'thermal lock up'.

For more information on Onsite welding visit www.mrsiteservices.co.uk

Fall Arrest Systems

To enable roof access after roof system installation - 'NON Penetrative' Safety systems can be incorporated into the system - Fall arrest systems as shown are clipped over the outer sheet creating an attachment that does not require penetration of the sheet.

For more information visit our reccomended fallarrest system partners.
www.latchways.com

Roof Access Hatches

Opening hatches, smoke vents and the like are available in sizes upto 1,200 wide, all require sensible trimming supporting the cutout in the lining, hardrock insulation fully supporting the pans and in-situ welding. Please note that where access to the roof is provided fall arrest protection will be necessary as will clearly marked and reinforced paths or, better, raised walkways fixed by non-penetrative seam clips. Suitable hatches and soakers can be ordered through our Sales office or from Brett Martin and MR Site Services, walkways and mansafe systems are not supplied by Euroclad but tested units are available from Latchway Systems. NBS specification clauses and details are available on request.

Safety Walkways

To enable roof access after roof system installation - 'NON Penetrative' Safety walkeay systems can be incorporated into the system - Fall arrest systems as shown are clipped over the outer sheet creating an attachment that does not require penetration of the sheet.

For more information visit our reccomended safety walkway system partners.
www.mrsiteservices.co.uk