Refer to ~ for ~.

Refer to the general section 1232 INTERPRETATION & DEFINITIONS for abbreviations and definitions used throughout the specification.

Refer to the general section 1233 REFERENCED DOCUMENTS.  The following documents are specifically referred to in this section:

Manufacturer's and supplier's documents relating to work in this section are:
STEELFORMERS Roofing & Cladding Systems Product Guide

Copies of the above literature are available from Steelformers.

Provide a material manufacturer/supplier warranty:

• Provide this warranty on the manufacturer/supplier standard form (if not available then use the standard form in the general section 1237WA WARRANTY AGREEMENT)
• Commence the warranty from the date of practical completion of the contract works.

Refer to the general section 1237 WARRANTIES for details of when completed warranty must be submitted.

Provide an installer/applicator warranty:

• Provide this warranty on the installer/applicator standard form (if not available then use the standard form in the general section 1237WA WARRANTY AGREEMENT)
• Commence the warranty from the date of practical completion of the contract works.

Refer to the general section 1237 WARRANTIES for additional requirements.

Refer to 1270 CONSTRUCTION for requirements relating to qualifications.

Where a product or material supplier is named in SELECTIONS, the product/material must be provided by the named supplier.  Where more than one named supplier, any one of the named suppliers will be acceptable.

Substitutions are not permitted to any of the specified systems, components and associated products listed in this section.

Refer to the general section 1239 OPERATION & MAINTENANCE for provision of the following general operation and maintenance information as electronic PDF format documents:

• Caring for COLORSTEEL® documentation
• Maintenance information contained within STEELFORMERS Roofing & Cladding Systems Product Guide

Provide this information prior to practical completion.

Test the completed rainwater disposal system with water to ensure spoutings are laid to correct falls, that both spouting, gutters and downpipes are unobstructed and that no ponding occurs.

Steelform 148 fascia system, 0.55BMT COLORSTEEL® MAXX® 148 x 28mm metal fascia in 10m maximum lengths with hidden brackets.  Refer to SELECTIONS.

Steelform 185 fascia system, 0.55BMT COLORSTEEL® MAXX® 185 x 38mm metal fascia in 8m maximum lengths with hidden brackets.  Refer to SELECTIONS.

Metal spouting complete with brackets and screws.  Refer to SELECTIONS for type.

Metal box gutter complete with brackets and screws.  Refer to SELECTIONS for type.

Metal downpipes and accessories.  Refer to SELECTIONS for type.

PVC downpipes and accessories.  Refer to SELECTIONS.

Custom made rainwater heads, refer to SELECTIONS.

Metal or uPVC droppers, compatible with spouting material and sized to fit inside the downpipe.

Refer to SELECTIONS.

Minimum Class 4 durability and not less than the material being fixed.

Screw fasteners compatible with substrate and bracket material.

Sealed aluminium, minimum diameter 4mm.

MS Polymer sealant.

Refer to 1270 CONSTRUCTION for requirements relating to delivery, storage and handling of products.

Refer to 1250 TEMPORARY WORKS & SERVICES for protection requirements.
Refer to 1270 CONSTRUCTION for requirements relating to defective or damaged work, removal of protection and cleaning.

Check that framing, fascia or cladding are level and true to line and face and will allow work of the required standard without distortion to the product alignment.

Install to NZMRM CoP recommendations where not otherwise specified.

Refer to the general section 1270 CONSTRUCTION for general requirements.

Make adequate provision in the fixing and jointing of the spouting for thermal movement in the length of the spouting.  Provide an expansion joint in steel spouting and gutters over 18 metres in length.

Separate metals subject to electrolytic action from each other and from treated timber, concrete and other lime substances by space, painting of surfaces, taping, or separator strips.  Do not allow copper downpipes to discharge onto lower galvanized or zinc aluminium coated steel roofs.

Install concealed fascia brackets to all rafters with either screws or nails to a level line.  Fit 10m maximum lengths of metal fascia to the brackets.  Join metal fascia with silicone sealant and 4mm rivets at 150mm maximum centres and form corner detailing to Steelformers requirements, refer to SELECTIONS.

Establish minimum falls necessary (minimum 1:500, 2mm in 1 metre) to outlets to prevent ponding and screw fix brackets, true to line, refer to SELECTIONS for bracket spacing.  Brackets must also be located at all stopends and at rainwater heads.  Form all corners and stop ends on site.  Lap spouting joints a minimum of 40mm, silicone seal between surfaces and pop rivet to the manufacturer's recommendations.  Ensure the joint is fixed over its full girth.  Cut out neatly for and fit the pre-formed downpipe dropper and rivet and seal around the joint.  All installation to NZMRM CoP recommendations.

From high points fix brackets true-to-line to give a fall of 1mm every 2 metres to outlets.  Allowing for necessary expansion, assemble and fit spouting to brackets complete with outlets.  Lap all joints 40mm and solder, ensuring the joint is soldered throughout the full girth and extent of the lap.

Copper or brass should not be in direct contact with other metals, or have runoff water discharging onto other metals except stainless steel.

Install rainwater heads where required to NZMRM CoP, clause 5.3.1 Rainwater Heads.

Install either 2 outlets or one outlet and an overflow to each spouting section.  Cut out neatly for and fit the pre-formed downpipe dropper and rivet and seal around the joint.

Form downpipes complete with angle bends as needed with joints lapped and sealed.  Screw fix with pipe clips to rigidly stand off the wall plumb and discharging into stormwater gully or inlet pipe.  All installation to NZMRM CoP recommendations.

Form downpipes complete with offsets and shoes as needed with all joints lapped and soldered.  Brass screw fix with copper pipe clips to rigidly stand off the wall, plumb and discharging into the stormwater gully or pipe inlet.

Assemble downpipes, solvent welded complete, fit to outlets, galvanized screw fix with pipe clips to rigidly stand off the wall, plumb and discharging into the stormwater gully or pipe inlet to the downpipe manufacturer's required practice.

Install downpipe spreaders where required to NZBC E2/AS1.  Provide spreaders to downpipes that discharge onto a lower roof.  Ensure spreaders do not discharge directly over fasteners or laps and are clear of roof penetrations.  Spreaders to have four holes half the diameter of the downpipe.

Refer to 1270 CONSTRUCTION for completion requirements and if required commissioning requirements.