Internal Gutter Design

Internal gutters when internal gutters are difficult to replace and their failure could cause major disruption to the building below they must be made from materials that will last 50 years to comply with the nzbc.

Internal gutter design.

Available in lengths up to 8m fire rating. Can be purchased for 13 50 from www branz co nz or call 0800 80 80 85. Learn more how to storm water design for building sites. The upper edge of the gutter apron extends at least 6 onto the roof and is folded over and held by cleats at 12 o c.

E2 as1 8 1 6 1 requires all internal gutters to have a minimum 1 100 slope. Lpcb certified to lps 1181 grade ext b non fragility performance. Metallic coated steel is not recommended for internal gutters that are difficult to replace. Internal gutter construction gutter construction varied from a simple shallow trough or v like a valley detail to a tapered valley laid over firred framing to give a fall figures 5 and 6.

In this detail a one piece copper gutter lining and apron is used in conjunction with a standing seam roof. Often the outlet to the valley gutter discharged over a small portion of roof before being contained by the eaves gutter figure 7. The design of gutter and downspout assemblies is an area of building design which demands special attention. Ongoing maintenance of internal gutters is as essential as good design and.

Downpipe eaves gutter long straight eaves gutters box gutter to rain water head box gutter vertical faces box gutter side o flow box gutter vertical o flow storm water pipe size storm water network overland flow path spitter upstream end custom rain water head. A continuous lock strip is soldered to the apron at least 4 below its upper edge. Iko armourplan 0 6mm and1 2mm and sika trocal 0 8 and 1 2 mm application. 2014 class b maximum 868mm boundary sole 700mm valley sole dimension.

To make internal gutters as safe and durable. Internal gutters also known as box gutters are seen as an easy solution to the collection and disposal of roof water. Leaking gutters and downspouts can cause serious damage to a building s interior as well as exterior and repairs can be expensive. Figure 2 membrane roof and gutter design.

Boundary valley and valley hip lengths. However significant inconvenience damage repair cost and health issues may occur if water from the gutter gets into the building structure and or the space below. Maintenance durability and longevity are important factors to consider when designing gutters and. Checked annually for any damage or deterioration to the gutter lining cleared to remove debris leaves etc.

This bulletin outlines the requirements of e1 as1 and e2 as1 and gives design parameters to minimise the risk. Branz bulletin 556. E2 as1 specifies no end laps for membrane lined internal gutters and that metal gutter laps are welded.