On Tue, 21 Aug 2007 01:41:56 -0700, teddysnips wrote:
On Aug 20, 8:03 pm, wrote:
wrote:
We've had all our plastic guttering and downpipes (rainwater goods, if
you like) replaced with Lindab galvanised steel. Jolly nice it looks
too, and apparently maintenance-free for a good long time.
However, there was a problem with the gutters overflowing so a
representative from Lindab came to take a look, to make sure that the
correct type had been fitted. Apparently the problem was because the
builder had made the hole in the gutter above the "hopper" too small.
Because the builder's now off-site I think I'll have a go.
The Lindab rep said that there are two ways of doing it - drilling a
succession of small holes and then joining them up, or using tin snips
to cut the hole.
Maybe the Incredible Hulk could cut through this stuff with tin snips,
but I can't. I managed to drill round and then cut the joins between
the holes with the tin snips but it was a long and painful job. The
main pain is because the drill bit skitters about when starting the
hole.
I don't really want to drill piddling little pilot holes, so do I have
any other options that I haven't considered?
Sorry to go on at length.
Edward
Aviation tinsnips are geared, so easier to use than traditional british
pattern ones.
To stop the bit sliding about, hold a nail where you want to drill and
give it a tap with a hammer. The slight indentation stops the bit
wandering.
However, if you cut galv you expose bare steel, and rusting will begin
as soon as it rains.
I can't afford aviation tinsnips just for this job (there are 24 holes to
cut) The nail idea will do me very well. I spoke to Lindab about the
gavl/rust - their website says "To provide long time rust proofing the
steel is coated with 275g zinc per m2. The galvanised coating is
naturally self-healing, any scratch or cut being automatically sealed by
zinc ions which migrate to re-coat the uncovered steel". I can attest
that the current holes - too small - which were cut some six weeks ago are
all entirely rust free, and we've had a fair bit of rain up here in
Gloucestershire.
Edward
==================================
Their brochure includes a 'touch-up' paint. It might be worth asking if
that is for the kind of job you're contemplating. It might be for cosmetic
purposes only.
Try a cheap pair of aviation tinsnips:
http://www.machinemart.co.uk/shop/ra...8-5628A29B7471
If they don't work you won't have lost much.
Seriously, if the builder cut 24 holes too small I would be inclined to
ask him to do the remedial work.
Cic.
--
===================================
Using Ubuntu Linux
Windows shown the door
===================================