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COLOUR OPTIONS AND FINISHES

Includes Stramit M Pattern, S Pattern, Triline Stiffened Back and Stramit Triline Hook Back gutter products. 

When being cut to size, the maximum product length is 9.0m and the minimum length is 500mm. Product kept in stock is available in 6m lengths.

Stramit® S Pattern Stiffened Back Gutter

Stramit® M Pattern Gutter

Stramit® Triline Stiffened Back Gutter

Stramit® Triline Hook Back Gutter

Includes Stramit M Pattern, S Pattern, Triline Stiffened Back and Stramit Triline Hook Back gutter products. 

When being cut to size, the maximum product length is 9.0m and the minimum length is 500mm. Product kept in stock is available in 6m lengths.

Stramit® M Pattern Gutter

Stramit® S Pattern Stiffened Back Gutter

Stramit® Triline Hook Back Gutter

Stramit® Triline Stiffened Back Gutter

The M Pattern gutter can be cut to length (minimum order quantities apply). 

Stramit® M Pattern Gutter

Stramit's M Pattern, S pattern and Compact gutter products can be cut to length, with a maximum length of 8.5m and a minimum length of 500mm. 

 

Stramit® S Pattern Stiffened Back Gutter

Stramit® M Pattern Gutter

Stramit® Compact Gutter

Stramit Fineline is cut to length, with a maximum length of 9.0m. 

Stramit® Fineline Gutter

Includes Stramit Easiflow, Fascia and Fineline Gutters. Slotted gutters available if required. Minimum length 0.8m, 6.0m lengths kept in stock. 

Stramit® Easiflow Gutter

Stramit® Fascia Gutter

Stramit® Fineline Gutter

Stramit Fascia, Easiflow and Concealed Gutters can be cut to size.

Stramit's Concealed Gutter is available in stock lengths of 6.0m. 

The Stramit Easiflow Gutter can be cut to a maximum length of 9.5m and a minimum of 1m. 

The maximum product length of the Stramit Fascia Gutter is 9.5m and the minimum length 550mm. Product kept in stock lengths of 6m. 

 

 

Stramit® Fascia Gutter

Stramit® Concealed Gutter

Stramit® Easiflow Gutter

Stramit's Easiline Commercial, Patio and Domestic gutters can be cut to length. Slotted gutters are also available if required. Minimum length 1m, maximum length 8.0m. 

Stramit® Easiline Patio Gutter

Stramit® Easiline Domestic Gutter

Stramit® Easiline Commercial Gutter

Where to Buy

Stramit account holders can buy Stramit® Square Gutters from their local Stramit office. We do not sell direct to the public but our products are stocked by retail outlets across Australia.

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Availability

Stramit® Square Gutters are produced to suit local traditional shapes across Australia so products vary to suit the location. Please check with your local Stramit office or Product and Service Guide for a schedule of availability and whether the product can be cut to length.

News and Case Studies

Check out Stramit’s latest news, product releases and updates, and case studies featuring our quality Aussie-made steel products.

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General Information close-medium-white

Stramit® Square Gutters coated with Zinc-Aluminium / Zinc-Aluminium-Magnesium alloy and COLORBOND® steel will give excellent durability in almost all locations more than 200m from a marine environment or in some light industrial applications.

Applications close to industrial or unusually corrosive environments will need to be individually assessed for durability. For these and installations closer to the coastline, please contact your local Stramit office for advice. External brackets for Stramit® Square Gutters should only be used in benign locations.

Stramit® Square Gutters should only be used with Stramit® Fascia. Similarly, only use specified Stramit accessories when connecting Stramit® Square Gutters to Stramit® Fascia.

Hail
Stramit's rainwater products can resist impact from significantly-sized hail without damage. However, in hail prone areas consider placing gutter fronts well below roof level. This will help avoid the damming effect of hail which, if it allowed to build up onto the roof, can lead to overloading and gutter failure .

Snow
It is common practice not to use gutters in snow prone areas but to take care of roof run-off at ground level. Information on designing in snow areas can be found in Standards Australia Handbook HB 106 Guidelines for the design of structures in snow areas.

Stramit rainwater products should be handled with care at all times to preserve the product capabilities and quality of the finish. Packs should always be kept dry and stored above ground level while on site.

If the products become wet, they should be separated, wiped and placed in the open to promote drying.

High front gutters are commonly used in residential roof drainage systems to conceal the lower edge of roof cladding or tiles. These gutters form part of the roof drainage system, which is required to comply with the National Plumbing and Drainage Code AS/NZS 3500.3.

Details of the design process for roof drainage systems, which includes selecting overflow measures, are set out in this standard.

Most of Stramit® Square Gutters are supplied cut to length. Contact your local Stramit office or refer to the Stramit Product and Service Guide for your area for further detail.

Under the Environmental Planning and Assessment Act 1979 and its regulations, all building work must be carried out in accordance with the Building Code of Australia (BCA), now part of the National Construction Code (NCC).

In addition to referring to Australian Standards AS/NZS 3500.3, and AS/NZS 3500.5, the BCA also contains requirements for the disposal of surface water in Volume One, Performance Requirements FP1.2 and FP 1.3, and in Volume Two, Part 3.5.2, namely, Performance Requirement P2.2.1 and Clauses 3.5.2.1. to 3.5.2.5.

The most common means of satisfying these requirements for roof drainage (i.e. guttering) installations is by complying with the National Plumbing and Drainage Code AS/NZS 3500.3. Furthermore, in each state and territory it is necessary to satisfy the relevant regulations.

Stramit's Rainwater products are protected in Australia by registered designs.

Sizing of minimum downpipe size relates only to the cross-sectional area of the chosen gutter. Refer to the table below for the minimum round and rectangular downpipe size for the square gutter you plan to use.

NSW/ACT

Sizes 1 Gutters NSW Stramit

Sizes 2 Gutters NSW Stramit

QLD/NT

 

Sizes 1 Gutters QLD NT Stramit

Sizes 2 Gutters QLD NT Stramit

VIC/TAS/SA

Sizes 1 Gutters VIC TAS SA Stramit

Sizes 2 Gutters VIC TAS SA Stramit

WA

Sizes 1 Gutters WA Stramit

Sizes 2 Gutters WA Stramit

All Stramit rainwater products confirm with, or are equivalent to, AS2179.1.

Stramit has in-house, purpose built testing equipment used to design, develop and improve products for the Australian market.

Many of our products are tested or witnessed by independent organisations. These include University of Technology, Sydney;  James Cook University Cyclone Testing Station; The University of Sydney; and CSIRO.

The ongoing research and development activity ensure we remain at the forefront of innovation, design and consumer information.

Technical Information close-medium-white

The gutter shall be Stramit [insert Square Gutter type ] as selected based on size and performance. Material shall be protected steel sheet to Australian Standard AS1397 with a minimum yield stress of 550MPa and an AM100/AZ150 coating with an oven-baked paint film of selected colour, or a plain AM125/AZ150 coating.

All accessories are to be fully compatible as recommended by the manufacturer. The product and its accessories shall be installed strictly in accordance with the manufacturer's recommendations. Flashings and all adjacent products shall be supplied in compatible materials as specified.

All work shall be fixed in a workman like manner, leaving the job clean and weather tight. All debris (screws, rivets, cuttings and filings, etc) shall be cleaned off daily. Repair all minor blemishes with touch up paint supplied by the manufacturer.

Note: Some products supplied in 300MPa steel with galvanised Z275 coating.

In the design and detailing of a roof drainage system, consideration must be given to a range of factors.

These include:

  • rainfall intensity
  • roof catchment area
  • gutter size/capacity, falls and outlets (sumps, rainwater heads, nozzles)
  • downpipes (size, quantity and placement)
  • overflow consideration
  • material selection, and
  • jointing.

Stramit recommends a minimum fall of 1 in 500 for all gutters as this is a design requirement for the gutter and downpipe selection table . Good fall reduces the risk of leaf and debris built-up that could otherwise effect durability.

All fastening screws must conform to AS3566 – Class 3. For connecting brackets use the following.All fastening screws must conform to AS3566 – Class 3. For connecting brackets use the following.
 
ALL STATES (excl. WA)

Fasteners Gutters QLD NT Stramit

WA

Fasteners Gutters WA Stramit

Gutter overflow needs to be considered when designing and installing gutter systems. The overflow devices should have adequate capacity and the roof drainage system must be in accordance with AS 3500.3.

Drainage from copper or lead products (including roof flashings) should not be allowed to discharge on to zinc/aluminium or zinc/aluminium/magnesium alloy or COLORBOND® steel components. Similarly, lead or copper components should not be installed in contact with zinc/aluminium or zinc/aluminium/magnesium alloy coated steel. Each of these combinations will lead to premature corrosion.

Drainage from copper, COLORBOND® and zinc/aluminium or zinc/aluminium/magnesium alloy coated steel, translucent (or other inert material) should not be allowed to discharge onto, or into, galvanised products.

Stramit's rainwater products are manufactured from G550 and G300 Zinc Aluminium or Zinc Aluminium Magnesium coated steel (AZ150/AM125) or galvanized (Z275) in accordance with AS1397, and COLORBOND® steel with a coating conforming to AS2728.

Other coatings, grades and materials may be available, subject to enquiry.

NSW/ACT

Materials Gutters NSW Stramit

QLD/NT

Materials Gutters QLD NT Stramit

VIC/TAS/SA

Materials Gutters VIC TAS SA Stramit

WA

Materials Gutters WA Stramit

In all Australian states except Western Australia, overflow measures are not required for eaves gutters fitted to a verandah, or where the eave is greater than 450mm wide, with either no lining or sloping away from the building.

Slotted Stramit gutters give some overflow provision, when used with the Stramit® Snap Clip. A higher overflow volume can be catered for by providing the Stramit® Gutter Spacer or the Stramit BAT® Clip.

The Roof Run Length tables give the maximum sloped roof run length which can be used for the overflow through the slots, and back of gutter. These values are based on independent testing.

Where the Stramit® Gutter Spacer or BAT® Clip is used, they need to be installed as recommended in the installation leaflets provided with the product.

Alternative overflow measures

Overflow may also be addressed through alternative building design methods such as:

  • Unlined eaves, where appropriate to the house design, to eliminate the issue.
  • Gutter installed so that the gutter front is 10mm below the top of the fascia.
  • Back flashing, where gutter support brackets allow for installation of back flashing (e.g. external brackets).
  • The detailing and sizing of the selected overflow method/s is normally completed by the designer/installer, but must be adequate for the situation and must meet the relevant performance requirements of the NCC and Australian Standards.

 

The Building Code of Australia requires that where high-fronted gutters are installed provision must be made to avoid any overflow back into the roof or building structure by incorporating overflow measures or similar.

This requirement does not apply where the gutter is connected to a verandah or where the eave is more than 450mm wide, with either no lining or raked with a slope towards the gutter. Overflow design must be based on the 100 year ARI 5 minute duration rainfall intensity.

Methods of providing for overflow in the design and installation of roof drainage systems with high front gutters may include:

  • slotted gutter front to allow for water overflow through the slots visible on the front face of the gutter
  • a gap between the fascia and the gutter back, either by inserting a packer between the back of the gutter and the fascia or by employing proprietary systems and trade solutions
  • specific overflow measures including an inverted downpipe drop/pop nozzle at high points in the gutter but set at a level below the fascia top
  • stop ends cut down to a lower level to act as a weir; the stop end weirs could be hidden at the high point of the gutter and designed as part of an expansion joint
  • rainwater heads with overflow weir, or
  • holes, slot, or weir at downpipes.

Stramit's rainwater products have been designed and/or tested to all appropriate loadings and design action effects. These include wind, atmospheric corrosion, rainwater flow, rainwater mass, foot traffic loads, dead loads and ladder loads. The performance information for each product indicates those action effects accounted for in each case.

NSW Gutters Performance Table (PDF)

QLD/NT Gutters Performance Table (PDF)

VIC/TAS/SA Performance Table (PDF)

WA Performance Table (PDF)

Rainfall intensity values in the tables below are for 20 and 100 year ARI, 5 minute durations and have been derived from the National Construction Code 2016. It should however be emphasised that the extent and longevity of records in Australia are limited and any such data therefore carries with it a degree of uncertainty.

The 20 year ARI values should only be used for external eave gutters. For internal/box gutters and overflow design use the 100 year ARI values included in the tables. Specific data for any location can be obtained from the Australian Bureau of Meteorology.

NSW/ACT

Rainfall Gutters NSW Stramit

QLD/NT

Rainfall Gutters QLD NT Stramit

VIC/TAS/SA

Rainfall Gutters VIC TAS SA Stramit

WA

Rainfall Gutters WA Stramit

In all Australian states except Western Australia, determining the maximum sloped roof run length involves taking into account the additional length of roof which contributes to the flow in any one position when there is a roof penetration or spreader.

In these positions, the effective roof run length would be longer than the distance from the ridge to the eaves. A simplified method of finding this length is shown in the illustration. In this case, the maximum roof run length is 14m for a 10m length of roof due to the penetration 4m down from the ridge.

If the catchment area is known, the roof run length can be found by dividing the area by the length of gutter it feeds into.

 ROOF RUN LENGTH (all states excl. WA) PDF

Stramit® Gutters require the correct proprietary Stramit brackets (or snap clip/stiffener bracket combination) for support at spacing no greater than those shown in the following table.

NSW/ACT
Spans Gutters NSW Stramit
QLD/NT
Spans Gutters QLD NT Stramit
VIC/TAS/SA
Spans Gutters VIC TAS SA Stramit
WA

Spans Gutters WA Stramit

Gutter runs in excess of 20 metres require expansion joints.

Installation Information close-medium-white

Stramit's rainwater products can be easily cut, where required, using a fine-toothed hacksaw and tin snips. Please dispose of any off-cuts carefully.

While there may be variations between states, contractors who install guttering systems are generally required to hold an appropriate licence. The work is required to comply with the appropriate codes and standards. Statutory warranties normally apply and consumers have a right to lodge a complaint with the appropriate authority.

During the installation of the roof drainage system, particular attention should be given to the following:

  • The use of compatible materials for drainage system components, leaf-guard system components and fasteners/sealants to connect and seal the components.
  • The position of the gutter in relation to the fascia.
  • Installation of the specified gutter and downpipes, and ensuring that downpipes are installed in the correct locations and numbers.
  • Gutter fall, ensuring sufficient fall in the direction of the downpipes.
  • Overflow must be allowed for and specific components installed where required.
  • All debris and loose waste materials (swarf, fasteners, etc.) must be cleaned off at the end of each day and at the completion of the installation, to prevent blockages of the drainage system or deterioration of the individual components, and
  • Any protective films should also be removed as part of the installation process.

Stramit recommends installers follow the installation code for metal roofing and wall cladding as outlined in the Standard Australia Handbook - HB39.

Instructions Gutters WA Stramit

Instructions Gutters WA Stramit

Stramit's rainwater products are available in COLORBOND® steel colours. However should painting of Zinc Aluminium / Zinc Aluminium Magnesium coated steel products be required, use the following procedure.

A weathering period of two weeks following installation will make painting easier. Clean the rainwater product immediately prior to painting. Dirt can be washed off using water with mild detergent. Any grease marks should be wiped away with paint thinners.

In benign locations good quality acrylic paint will give satisfactory performance. First use a low-gloss water-borne acrylic primer. Finish with water-borne acrylic gloss, or your choice of gloss level.

Use only neutral-cure silicone for sealing joints when using Stramit's rainwater products. Take care to avoid pockets in joints which may hold moisture and potentially reduce durability.

Consideration should be given to handling and installation issues as part of site induction safety procedures. Specific consideration should be given to pack handling , avoidance of cuts, trips, slips and falls, long section handling, particularly in windy conditions, section cutting procedures and surface temperature on sunny days.

Personal Protection Equipment (PPE) should always be used, including cut resistant or leather gloves when handling and transporting product and appropriate footwear when handling long lengths.

Stramit's rainwater products manufactured in the COLORBOND® range of colours are supplied with a protective strippable coating. This should be removed at the last possible stage during the installation process.

It is possible to selectively move the coating to one side to avoid fastenings and joints before finally remove the coating from the installed product. Do not leave the products with strippable coating intact exposed to direct sunlight for more than a week or it can become difficult to remove.

Maintenance Information close-medium-white

Stramit rainwater products can benefit from occasional washing if they're not flushed out regularly. These areas include portions of fascia and the underside of accompanying gutters.

In the longer term, the ability of a roof drainage system to handle overflow depends on you cleaning and maintaining your gutters regularly so they can perform to their optimum capacity.

It's therefore worth considering the following maintenance regime:

  • Use appropriately-sized gutters set well below the roof edge with a good fall and large downpipes with well angled offsets to avoid corner blockages.
  • Clean frequently and remove overhanging vegetation.
  • Install mesh guard or a perforated gutter covering, noting the guard/covering and the gutter needs to be cleaned and checked regularly.
  • Ensure protective guards are material-compatible with the  gutter.

Following a regular and adequate maintenance regime is also a requirement for your warranty.