23 - Friday, July 4, 1986 - North Shore News

LEAK-FREE SOUND BARRIER
Insulation cuts out noisy neighbors

IF YOU live in an attached house,
you may be contemplating some
soundproofing work.

Effective sound control requires
three things; resilient supports or
connections wuround the enclosure,
sound absorbing materials, and
leak-free sound barriers.

Resilient. supports or connec-
tions are necessary because the
sound vibritions can be transmit-
ted from scund barrier to any ad-
joining materials. Resilient caulks
such as silicon, or acoustical
sealant can be used.

Sound absorbing materials, such
as fibreglass insulation, are porous
and actually transmit sound, but
dissipate the energy of the sound
waves while doing so.

STOP SOUND

Sound barriers are usually solid,
heavy and non-porous materials
that do not transmit sound well.
Drywall can be a good sound bar-
rier.

The sound barrier should be as
free of air leaks as possible,
because sound can move directly
through these holes.

Don't ignore electrical outlets
and plumbing penetrations. Seal
them with caulks or gaskets.

If you want to improve the

oo

soundproofing ability of a com-
mon wall between two houses and
space is limited, glue a layer of
drywall to the existing walls with
panel adhesive.

Leave a A inch gap at the top
and bottom of the drywall. Fill the
gaps with caulking and cover with
moulding.

With more space you can reduce
sound transmission further by ad-
ding strapping and fibreglass in-
sulation. Better yet, use resilient
metal channels from drywail or
acoustic supply houses, instead of

strapping.
CONSTRUCTION OPTIONS

If you're planning any new con-
struction such as a workroom in
the basement, you may want to in-
corporate sound-stopping features
into the new walls.

One way is to use 2x4’s stag-
gered on 24 inch centres, so that
no stud touches drywall on both
sides of the partition. A slightly
better wall uses 2x4’s and horizon-
tally placed metal channels.

The drywall attaches to the
channels.

To stop really loud noises,
substitute metal studs for wooden
ones, fill the space with insulation

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Ceilings can be treated in the
same way. Just follow the three
principles.

bottom and top plates on a layer
of caulking, and treat edges and
holes as outlined above.

and add a double layer of drywall
on one side of the partition.
Remember in all cases to bed the

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MOSS REMOVAL

also fungus, tree droppings etc.

PRESSURE WASHING

walkways, patios, sundecks, walls

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