the biggest determinant here is the cost v isolation required.
This building is in an industrial area so we can make noise,
next door is a Iron Gate/Hinges etc. etc. manufacturer who
doesn't make any real noise and our building is double brick
as is theirs with a driveway and alley separating us. On the
other side they don't make any noise either, haven't heard
anything yet. Below is a car repair workshop who occasionally
bang something but there is 150mm (6") of concrete in
the floor between us. Our main noise problem is the railway
line behind the buildings on the other side of the street
and the rain. The railway isn't bad at all as the main trains
are electric passenger trains and you can't hear them at all.
The trucks in the street are noisier. There is the odd freight
train but they are only around 1 or 2 a day/night and the
floor shakes a bit then. Considering that we have decided
not to float the floor which would be quite expensive in timber/flooring
and insulation. So we are going to build directly onto the
concrete floor and isolate the frame with rubber top and bottom.
ceiling has been totally sealed and this will stop the rain
noise. The roofing is Asbestos Cement which is one of the
quieter roofings anyway. The first thing was to mark out the
studio on the floor with chalk string and we are now going
to start on the outer framing. This will stretch between the
floor and the ceiling all the way around and be isolated from
the ceiling and the floor with rubber.
had a job finding an affordable rubber. We found some neoprene
that was 50mm wide and 6mm thick but it would have cost $1700
to do the whole place. Instead we found some foam rubber 20mm
(3/4") thick in 2m x 1m (7' x 3') sheets. We got three
sheets for $310 which is more like out budget.
thinks its his new bed
will cut it into 50mm (2") strips and lay under the 95mm
x35mm (4" x 1 1/2") framing. The rubber cuts easily
with a Stanley knife
will also use the rubber to seal to the ceiling at the top
of the frames. As you can see when the weight of the framing
and plasterboard goes on, the rubber will compress down really
well. The concrete floor isn't exactly flat and bows in sections
so this will clear up the unevenness.