Adding Attic Ventilation on old house

Old 03-11-01, 12:21 PM
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I have a house built in 1949 with a sloped roof that experiences ice dams in winter. I had 11" of fiber glass insulation recently installed in the attic floor. I only have partial ventilation currently. I have vents at the gable ends and at the top center of the roof.

The problem I have is that I would like to install soffit vents under the eaves to complete the ventilation path, but the construction of the house prevents me from doing so.

The rafters and ceiling joists go directly into the cement wall (instead resting on top on the wall like in newer homes).

How could I make a ventilation path for the soffits?

Do I need to cut into the cement wall or raise the roof with shims to create an inlet path ?

If openings must be made into the cement wall, are they required between where every rafter pair meets the wall or can they be made between every 3rd or 4th rafter pair? The wall length is 22 ft and there are 17 rafters intersecting the wall.

Thanks TheZman

[Edited by TheZman on 03-13-01 at 03:37]
Old 03-14-01, 04:07 AM
Join Date: Dec 1999
Location: South Dakota
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I think I would abondon your plan. Very costly. More then you would gain.

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