The fitting of the aluminium trims is a simple procedure but it is very important that time is taken to achieve a good standard of finish. You should have a hacksaw or junior hacksaw a pair of pliers, a pair of gloves and depending on the method of fixing either a screw driver or a hammer.
Depending on your level of experience various levels of finish can be achieved there are only a few basic bends used to make the trims fit. Most roofs will only require one or two of the below methods, (although it is not unheard of to employ all three methods within the length of one trim) familiarise yourself with them to decide which methods you need to employ.
Methods for bends: -
Establish where the corner will be situated in relation to the trim cut a slot in the top face of the trim, from the open edge to the corner
Push one side of the cut under the other whilst bending the trim, bend until required angle is achieved. If the angle of less than 90º is required a V must be cut out to allow the trim to bend more.
Achieved
in the same way
as external
corners except
an additional
cut has to be
made to the
turn-up of the
drip edge, this
is to allow the
trim to bend
without
buckling. The
gap that is
created on the
top edge of the
roof when the
trim is bent
this way can be
filled with a
square scrap of
trim. This is
only required
if the
cosmetics of
the top of the
roof are
important i.e.
if the roof is
overlooked.
Used to make the front edge, (were the roof drip edge meets the upstands) look tidier. The exact angle and length of the closure is left to the individual, the only rule is that, they must be the same size either end of the drip edge (for cosmetics).
Firstly decide how big you want the closure some like to run it all the way down to the guttering. Mark the vertical face of the trim accordingly and cut a slot, flatten (using pliers) or cut away sufficient of the drip turn-up to allow a neat bend
Now that you have seen the three main methods of cutting and bending the trims it is up to you to decide the exact method for fixing.
On
a typical roof
it would go
something like
this:
Starting
at one end of
the drip edge,
decide what
size drip edge
closure would
look best. Cut
to suit and
bend to desired
angle and fit.
Closures are
not strictly
necessary the
trim can be
fixed level
with the corner
as
shown
in the
diagram to the
left.
Butt the next trim up to the first, if it meets a corner then mark that point, cut and bend accordingly. If a trim meets a wall then it should be cut to length and fitted.
The remaining perimeter of the roof should be done in the same manner being careful to make the other drip edge closure the same size as the first to keep the roof looking symmetrical from the ground.
It should be noted that NO Trims are ever fitted to the drip edge
The fixings used are either screws with cap and covers or poly nails which are a stainless nail with a plastic coated head. Exact lengths are to determined by the customer but are usually about 40mm
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