Regulatory requirements for overflow in eaves gutters systems
As all professional plumbers are aware as of 1/1/16 the VBA are enforcing AS3500.3 (2015)
What Does This Mean?
In simple terms they are requiring gutter installation be able to cope with 1 in 100 year rainfall events and prevent flow back into the eaves. Previously acceptable methods, such as slotted gutters, are NOT compliant.
What Does This Mean for the Plumber?
The VBA has provided several options for plumbers to make an installation compliant:
- lightbulb-oHang 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.
- lightbulb-oUse a 10mm spacer – This creates a gap behind the gutter so water can overflow freely.
- lightbulb-oFlashing – Install a flashing behind the gutter, running up the roof to increase the apparent height of the fascia board, allowing water to overflow the bead
Our Preferred Method: Continuous Quad with Overflows
Some of the methods offered by VBA may not be very practical or acceptable to home owners or buildings. We have developed Overflows to be our preferred installation method to comply with AS3500.3 (2015).