09:33AM | 02/01/08
Member Since: 01/31/08
1 lifetime posts
Let me start by saying we think we know what is causing our problem, we just don't know to solve it.

Our problem is condensation in the attic.

Our home in Northeast Pennsylvania was built between 1988 and 1990. The house is a 50’ x 35’ raised ranch on a moderate slope with a full walkout basement overlooking a small mountain lake. The house has cathedral ceilings throughout most of the home with a loft over the kitchen and bath areas. In the loft there are two small storage attics, one to the left and one to the right. The roof is of standard roof shingles and has a ridge vent along the entire peak and continuous soffit vents.

We now discover that during construction our builder stuffed too much insulation between the rafters on top of the Styrofoam vent channels literally collapsing the vent channels, greatly reducing proper roof venting. Being a weekend home, the attic condensation problem was never noticed since there was not enough moisture generated during those short stays to be a problem. Now that we have moved in full time and have a humidifier running in the winter, the condensation is a real real big problem with water dripping all over the place. If we had a normal roof we could go into the attic and correct the problem from there but most of the house has cathedral ceilings. The small attic areas off the loft are where we can see and touch the rafters and is where the problem was first noticed. Now there is water running down the sidewalls where we have the cathedral ceiling. All bathrooms and clothes dryer are properly vented to the outside. Recognizing part of the problem is from excessive moisture, we stopped using the humidifier.

I have read and heard a lot about how to prevent this problem from the beginning but other than reducing the moisture level in the home, I have not found nor heard anything on how to correct the improper roof venting once it is discovered in an older home. One roofer stated we would have to rip off the roof shingles and roof sheathing, extend the rafters with 2 x 2’s, add new ventilation baffles then re-sheath and re-roof.

Wow that sounds expensive, is that the only way?
3108 attic condensation


06:07PM | 02/03/08
Member Since: 04/25/05
1915 lifetime posts
Either the roof and sheathing or the ceiling need to come off.

With that much condensation the insulation is probably soak and needs to be removed.

Depending on the rafter depth and the amount of trim affected it might be best to use closed cell foam and convert it into a "hot" roof (unvented).

There are a lot of trades of on how to fix it depending EVERTYHING about the construction.

But in anycase it needs to be completely opened from either the inside or the outside.


09:03AM | 02/05/08
Member Since: 11/10/06
138 lifetime posts
If I may,

Reguardless of why, your venting is not properly installed. Iv`e done hundreds of these repairs, the outside route is the way to go. It may cost more but the inside route invades your lifestyle, living conditions and you don`t need to be home for the outside way.

The extra costs are due to adjusting siding flashing, chimney lead counterflashing, fascia repairs and cieling repairs from raising skylight(s). Pipes wont be an issue but can be moved at this time (stink pipes). Your photo shows little of these costs !!

Your basically gonna raise rafters, fill in between with foamboard (since it`s advent, don`t use anything else), re-sheeth, re-roof, and re-work trimmings.

Licenses, referrals, timming, and warrantees` should be considered, before you choose a contractor and or prices !!
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