Sometimes i see architectural specifications nominating a colorbond roof with a zincalume box gutter.
Box gutters vba.
Box gutters get a lot of moist leaves and debris and these can shorten its life so the rule of thumb is to have the box gutter material as good or better in the corrosion department than the roofing material.
Beowulf builders bringing old homes into the future this video explains how you go about installing a boxed gutter.
If you have any questions about the vid.
Simplified suitable for flattish roofs with little or no vertical faces or steep roofs draining to one side of box gutter only or any roof if you are in a hurry and make the necessary allowances for all catchments.
Box gutter with rain water head at end of box gutter.
Use a 10mm spacer this creates a gap behind the gutter so water can overflow freely.
Box gutter design and compliance is detailed in plumbing.
They are simply described on the vba s box gutter design fact sheet as a graded channel generally of a rectangular shape for the conveyance of rainwater within the building footprint including adjacent to a wall or parapet.
This has become a big issue in the past few months particularly in victoria and is going to be a new section in the upcoming.
In my last article i discussed the emergence of the issue of provision for overflow in external eaves gutters or more specifically the lack of provision for overflow.
The vba has provided several options for plumbers to make an installation compliant.
The side with the maximum flow is used to size the box gutter.
Architects draftpersons builders and other practitioners responsible for designing a box gutter should work closely with the roof plumbers that will install the box gutter to ensure that the overall design and installation will be compliant with relevant regulations.
The total flow is used to size the sump and overflow.
Plumbers are reminded that roof drainage systems need to be designed and installed with appropriate overflow provision.
Installing box gutters to achieve compliance with relevant regulations.
Hang the gutter lower the top of the bead must be 20mm below the top of the fascia to allow water to overflow safely over the bead.
Overflow provisions for gutters here box gutter design click here hia will also develop further information on the new plumbing regulations as more information becomes available.
This free online box gutter calculator will calculate the size of box gutters and sumps with a side overflow in accordance with the australian plumbing code as nzs 3500 3 2003 part 3 storm water drainage.
The vba has a number of documents on their website that gives more details on roof drainage and box gutters.
Box gutter design compliance.
This combination can result.
