When choosing what type of gutter you want consider material initially.
Internal gutter fixings.
Rafters 4 1 ridge radius end rafters 8 9 4 2 jack rafter connection 9 4 3 gable end rafter 10 4 4 standard valley rafter 10 4 5 drop valley rafter 11.
With the exception of membrane roofs water from internal gutters must discharge into a rainwater head or to an internal outlet as shown in e2 as1 figures 63 a and b and figures 64 b or c see figure 3.
To establish the position of the running outlet or stopend outlet hang a plumb bob from the fascia so that it hangs directly over the drain.
Reduce the top rib for 25mm to allow for a slip joint.
This bulletin outlines the requirements of e1 as1 and e2 as1 and gives design parameters to minimise the risk.
E2 as1 8 1 6 1 requires all internal gutters to have a minimum 1 100 slope.
Figure 4 overflow located below any potential overflow into building from e2 as1.
Figure 2 membrane roof and gutter design.
Cut gutter ends at 45 as shown.
They are installed internally at a maximum of 1 2 metre intervals and are not visible on the external face of the gutter.
Assemble in a similar manner to external corners.
Internal gutters also known as box gutters are seen as an easy solution to the collection and disposal of roof water.
Design for a 10 minute rainfall intensity for the location with a recommended minimum design intensity of 200 mm hour rainfall intensity is for a storm with a 10 probability of occurring annually.
Internal gutter straps hold the face of the quad guttering into position.
Eaves beam 3 1 fixing the eaves beams 6 3 2 fixing the gable support platform 6 3 3 joining the eaves beam 7 4.
Internal gutters must be continuously supported on timber boards treated to h1 2 or on ply treated to h3.
There must be no fixings in the bottom or sides of the gutter.
Cut the gutter ends at 45 as shown.
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.
Fix external and internal corner over mitred cuts use rivets or screws and silicone.
Make sure the fall is set towards your downpipes with a stringline then install the clips into timber fascia using flat headed bugle screws.
Use a pencil to mark the positioning of the outlet and its fixing holes onto the fascia ensuring that it is no more than 50mm below the level of the roof.
Box gutter 2 1 fixing sealing the box gutter 4 2 2 joining the box gutter 5 3.
To make internal gutters as safe and durable.
E2 as1 specifies no end laps for membrane lined internal gutters and that metal gutter laps are welded.
