"HOME IMPROVEMENT SUPPLEMENT, Tuesday, October 11, 1977, PAGES
CHANNEL CHUCKLES

Insulating under house keeps in warmth By Bil Keane

You can substantiall
reduce your ting an
cooling bills by insulating
the attie floor, since in-
sulation keeps hot air inside
your home in the winter and
outside in the summer, ‘It's
important to remember,.
- though, that heat flows in
any direction toward a
cooler surface,’ notes
Joa a
res energy ex
for Certain-Teed ‘or-
poration, Valley Forge, Pa.,
prices, ti alse pays {0 Ih
ces, 0 pays to in-
sulate floors over areas like
crawlspaces,. garages -or
basements. This applies,’
he says, ‘Even if your home
is already well insulated in
the sidewall and attic
areas.” .

“While crawling un-
derneath your home to in-
sulate a crawi-space ma’
not strike you as the best jo!
in the world, it can still be
readily accomplished by the
do-it-yourselfer,'’ Mr
Kimpflen says. You'll need
a serrated bread knife (to
cut insulation as needed),
temporary lighting with
waterproof wiring and
connectors, a protable fan
or blower to provide ven-

tilation, a tape maesure, -.

heavy duty staple gun and
staples, and of course, the
insulation. Also buy enough
6-mil thick polyethylene
sheeting to cover the entire
, earthen area under the
house and to extend up the
sidewalls several inches, as
well as moisture-proof duct

tape.

When purchasing in-.
sulation, know beforehand
the distance between the
floor joists (usually 15 in-
ay or 33 inches) fo you can

ion € proper
width. You'll also need to
‘purchase insulation with a
reverse flange on the out-
side to staple to the floor
joists; Or, you can use batts
of rigid:fit kraft-faced in-
sulation if you install wire
mesh or chicken wire over
the joists to hold batts in

place. ;

Hf you elect to use this
method, begin by stapling
the chicken wire across
several joists, starting at a
wall at one end and working
out toward the center. Then

slide fiber glass insulation .

baits in on ap of the wore.
Besure that the kraft paper
vapor varrier attached to
the insulation is installed
facing up toward the floor of
the living area. When you
come to the crawlspace
wall, bend the insulation
batts up the wall until they
butt firmly against the
underside of the floor above.

The vapor barrier is
_ designed to prevent
moisture in the warm air
inside the house from get: .
ting into the cooler air
beneath the house. If this
happens the moisture will
condense, because warm alr
can hold more moisture
than cold air can.

- The vapor barrier
itio is critical, then,
Pecause the. moisture
gondense in, the, insulation
misplaced. This reduces the

thermal efficiency of the
insulation until it dries out

again.

With the vapor barrier seams of the sheeting by .area and there should also
facing up toward the about 6 inches and secure be cross ventilation. In the
flooring overhead, it's them: with moisture-proof winter, you can close off the
unlikely that moisture will tape. Also, extend the vents if you wish — but it’s
get through it. Even if, by sheeting up the sidewalls of not necessary.
some chance some does, the the srawlspace two to three yoy may want to protect
ventilation in the crawl inches and secure it with te insulation if your home
space will: quickly dissipate tape. has open crawispaces, by
it, _ Finally, make sure your nailing standard interior

Once the insulation is crawlspace is properly ‘grade softwood plywood,
properly installed, put down ventilated during the ‘insulation board or a similar
6-mil thick polyethylene summer. Asarule of thumb, covering tothe bottom of the
sheeting on the floor of the when the ground is covered floor joists. Do not use

crawl space, to prevent with a vapor barrier, you polyethylene sheeting for “Toni ;
moisture’ getting ito the need atleast 1 square foot of {his as moisture cannot Be Tonight's episode:
crawispace area from the vent openings for every 15) ‘through it to the ventila you any
ground below. Overlap the aquare feet of crawispace area, ; wool?

TTL lalallala et enn eee

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