Hello everyone. I have some major moisture issues in my attic. I'll try to be as thorough as possible. Sorry in advance for the long read. We had a new roof put on in October 2011. I live in Colorado. That winter, there was zero issues: interior water damage, exterior siding damage, attic moisture, etc. Within the last 3 weeks or so we've had two snowstorms come through that dumped about 4 inches each time. With in the last 3 weeks, temperatures have not peaked over 40 degrees and got as cold as single digits. A little over a week ago I noticed what appeared to be water marks on the outside of our masonite siding, mainly on the back of the house first. As the days progressed and the snow on the roof began to thaw I noticed these water marks get worse and buckling begin. The water marks also began to appear on 3 out of the 4 sides the house I went into the attic to check for any type of damage as I automatically assumed it was a roof issue. Below are some pics I took. It appears the plywood and rafters are total soaked. However, I did not see any actual dripping or streams of water. The attic moisture was isolated only on the back of the house. We have 3 soffit vents each on both sides of the house and 3 ridge vents. None of the vents are blocked. Here is where I'm baffled. No variables have changed except for the new roof being put on. Thermostat has remained constant compared to past years, humidifier has stayed constant. There is no sign of any interior damaged, it all appears to be exterior. The house is 12 years old with zero moisture issues before. I'm not sure how this all would have happened within the last two weeks. Another thing I find odd is that my neighbor behind my house just had a new roof put on in the last month as well as had the house painted. I've noticed that they to now have these watermarks appearing at the bottom of the eave of their house. They had no previous water markings on their siding until after their roof was put on. Any help would be appreciated. Do I need to look at better insulating options? Is this possibly a roof issue? Is this a project that is going to come out of my wallet or can I go back to the roofing company or file a claim with my homeowners insurance. Thanks again for the long read. [IMG]http://i293.photobucket.com/albums/mm76/crackalakin81/20121225_135600-1.jpg[/IMG] [IMG]http://i293.photobucket.com/albums/mm76/crackalakin81/20121225_135518-1.jpg[/IMG] [IMG]http://i293.photobucket.com/albums/mm76/crackalakin81/20121225_135455-1.jpg[/IMG] Roof plywood on the back side of the attic [IMG]http://i293.photobucket.com/albums/mm76/crackalakin81/20121225_132304-1.jpg[/IMG] [IMG]http://i293.photobucket.com/albums/mm76/crackalakin81/20121225_132226-1.jpg[/IMG]

My house is located in a coastal area on the south shore of Long Island - within about a block from a canal used for boat access. I am not in a FEMA designated flood zone, though I am very close to it (part of the property next door is within the flood zone). In fact the FEMA map worked out pretty much as expected during Hurricane Sandy. I had water come all the way up my driveway and stopped a few inches from my front door and garage before receding. Many houses in my neighborhood were in fact flooded, some quite extensively. I was very lucky. A few weeks after Sandy I noticed, for the first time, a small amount of water collecting along the northern wall of my basement. Less than an 1/8th of an inch, and confined to a small area. It occurred soon after a heavy rain. The basement is only about 250 square feet or so, taking up about a quarter of the home's footprint (NW corner). Thereafter, that condition repeated itself after heavy rains. There appears to be quite a bit of washout underneath my concrete perimeter foundation. About 6 months ago I had some I-beams placed in the basement to take the load off of an interior foundation wall that had some lateral cracking. When they drilled through the concrete floor I was amazed to find a void of about 1 and a half feet underneath the basement floor. It almost seemed like the house was floating on air. I spoke to a structural engineer who told me that isn't unusual for my area. He suspects that there are piers underneath the foundation lending support. Outside the northern wall of my basement is a concrete patio. The portion along the wall itself had quite obviously been raised above its original position - I'm guessing as the result of water getting underneath and freezing. I'm planning on redoing that patio anyway, so I purchased a cheap demolition hammer and tore out that section of concrete. Indeed, there was a void underneath that concrete of up to 2 feet along the home's foundation. I then dug a trench along the foundation on that affected northern wall, removing mostly sand with some soil on the top. I was hoping to find some sort of obvious cracking that could be repaired, but it actually seems pretty much pristine. While digging the trench, at one point I decided to dig below the footer in one small spot to see what I might find. Sure enough, a few inches below the footer is standing water. At that point my assumption was that I have a high water table, perhaps due to Sandy from a few months ago, and that the water was coming in from beneath the basement floor when it rained. I figured I could install an external French Drain system with a sump pump (can't use gravity here) - but that doing so would probably be overkill. My best amateur guess was that if it was really a groundwater problem, and I haven't had this issue in the past, probably over time the ground water would recede on its own without any major interventions. However, now I am not so sure it is even a ground water problem. Why? Well the foundation is still exposed, and although it rained quite a bit yesterday and last night, no water got into the basement (as I would have expected it to). That leads me to believe that in fact the water is coming in via capillary action through the foundation wall. Since the dirt is removed, the water isn't going up against the wall, and therefore isn't coming through. Now I'm thinking that I should just dig up the rest of the foundation (not very many linear feet left) and just coat the whole thing with an elastomeric membrane to keep the water from coming through the wall. I still think the exterior french drain with sump pump would be overkill, as my assumption is that if indeed it's a water table problem, which now seems less likely, it's probably temporary, as we never had such a problem before. I would definitely appreciate any thoughts or advice, as I am a true amateur when it comes to this sort of stuff. Thanks.