Should i do anything about my attic ventilation.
Frost unheated attic wall.
When the moisture gets into the attic it condenses on the roof.
When the outside temperature rises again the frost thaws water collects and can leak into.
During winter conditions attic frost is a problem associated with attic bypasses.
If the attic has blown in cellulose check to see if there is a vapor barrier and confirm the cellulose insulation is spread evenly throughout the attic floor.
The final step is attic ventilation.
Should we be concerned.
A michael maines answers and gives advice on the question about bath fan venting for cold climates.
There is no form of vertical insulation provided.
This horizontal layer has to extend throughout the building area outward also.
There is also a vapor barrier over the insulation.
That s about it pretty simple.
But plumbing pipes in an unheated area such as an attic crawl space and garage are at risk of freezing.
My husband says cold air is coming through the outside soffit and there is no way to insulate this.
The common solutions to this ice problem are to use a higher powered fan use a larger diameter shorter duct run and wrap the pipe with better duct insulation.
Often inexpensive foam pipe insulation is enough for moderately cold climates.
I m having problems with frost forming on the roof sheathing in my unheated attic.
For severe climes opt for wrapping problem pipes with thermostatically controlled heat tape from 50 to 200 depending on length which will turn on at.
Attic vapor barrier detail for cold climates the best approach for a vented attic in a cold climate is installing a layer of drywall with a good coat of latex paint the paint creates a semi permeable vapor barrier.
This type of frost wall won t work for an unheated building type.
I sealed all the attic bypasses i could find and stapled down plastic sheets between the joists before blowing in loosefill cellulose.
Victorian home much thanks.
Attics with pull down attic stairs should have attic stair insulation covers installed.
When warm air from inside the house escapes traveling up through the bypasses the moisture condenses on the roof boards and rafters where the frost can form.
An alternative for such issue is to design a horizontal layer placed under the foundation of the entire building.
I have seen mega frost in attics where r40 light density fibreglass was on the attic floor and the tegular mushroom vnets and or ridge vents were covered with snow.
What can we do.
This winter i hav seen water run out of wall assemblies with fibreglass batting in the framing and rigid foam board on the exterior of the sheathing.
I have an old home built in 1922 and i reinsulated the attic this fall.
And it would not add to much weight to attic size is 550 sq.
