Two sizes of guttering cover most domestic
situations:
- 75mm half-round gutters
and 50mm circular downpipes for sheds, greenhouses
and small detached garages.
- 112mm half-round gutters
and 68mm circular downpipe for houses and
large detached garages.
If you live in a large
house or in an area of high rainfall, you
may need a gutter which has a greater capacity
- either 116 x 60mm 'square' guttering (used
with 65mm square downpipe) or 120 x 75mm 'ogee'
guttering (used with square or round downpipe).
Planning the work
Whether you are planning to
replace the entire guttering on a house, or
just one side of a garden shed, following
these few simple tips will make the job much
easier.
Make a sketch plan of the house
or outbuilding, and write down all the relevant
dimensions. Work in metric units as this is
how guttering is sold.
If you have difficulty measuring
the height of a house, simply count the number
of brick courses from the ground to the eaves
and divide the answer by 13 to get the length
of downpipe you need in metres.
Work out the lengths of
guttering and downpipe you need and fill in
a checklist for the necessary components (1).
Fascia brackets should be placed
no more then 1m apart.
Stopend outlets, running outlets,
union clips, angles and stopends need a supporting
fascia bracket within 150mm both sides of
the fitting.
Watch out for Ogee gutters:
90 degree corners are either internal or external.
Stop Ends are either left handed or right
handed.
Always over-estimate when
ordering. It is better to have too much gutter/pipe
rather than too little.
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