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Posted by George E. Cawthon on October 12, 2006, 4:38 pm
Mulan wrote:
> I pulled up the floor to the crawl space just in the back part of the
> house to put black plastic down and insulate it and I found a one foot
> square hole to the outside and the air coming in is FREEZING. There is
> a half basement with a small window and another small vent about 7
> inches in diameter under another room next to the big freezing one.
> The house was build in 1900.
>
> Can I seal up that airspace or put insulation over it? It also has a
> grating outside on the ground and I bet when it is raining that water
> gets in too.
>
> What are my options?
> Thank you
>
If you have any dirt still showing in your
crawlspace/basement. Cover it with 4-6 mil
plastic. Make sure that you have 2-3 foot
overlaps so that any water that gets in can drain
to the ground through the overlaps.
Yes, seal the whole thing up in the winter. Plug
every hole and opening with fiberglass insulation
and cover the outside of holes with wood to keep
the fiberglass dry. I would add something over
the window too unless you use if for illumination,
in which case, I would cover with 4 mil plastic in
the winter. You can remove the insulation from
the big areas and replace with screens in the summer.
Don't understand about the grill on the ground and
water coming in. Water should drain away from the
foundation/basement walls.
A 1900 era house is so leaky that you shouldn't
need to worry about air for combustion of a
furnace. If a furnace guy says you need more air,
then run a cold air pipe from outside to the
furnace and put a damper on the pipe (opens when
the furnace draws combustion air).
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