Rusty Nails In Roof Vents

I have noticed the last couple of winters that when i bring something down from the attic it has rust spots on it.

Rusty nails in roof vents.

New decking on it all and dimensional shingles. Winter condensation on the nails even forming frost in freezing weather rusts the nails and stains the roof sheathing around them. Frost later melts off of these nails and drips onto the floor below. What is up with this.

I can see the roofing nails that protrude into the attic are dripping wet. I would recommend doing this on a sunny day and after exposed to sun for a few hours. I had a new roof put on my house 3 years ago. Roofing nails are galvanized but add enough moisture and galvanized nails will rust.

The pattern may occur more on the cooler or north slope of the roof. Indications that your attic might have a ventilation problem include wet or compressed. Instead with a little effort you can help revive your vent and have it fight off the rust attack. Some of the nails appear rusty.

Over time your roof vent may become rusty. Insulation rusty nails or rust spots that dripped onto your insulation blackened plywood mold or mildew inside your attic curling or cracking shingles uneven snow melt and icicles. The idea of roof vents existed for hundreds of years with natural vents employed in chinese buildings during the tang dynasty natural ventilation ducts in the buddhist monks caves and wind catchers incorporated in arabian architecture. Vent roofs with steeples towers or cupolas can be found in different buildings from barns to cathedrals.

All of those things will add to the moisture in the attic and will rust any metal exposed there. You to have the vent replaced. During the attic inspection i noted water stains around the roofing nails. Press it onto the.

The roof covering is an asphalt shingle and it appeared in good condition with no visible defects. Remove nail lift shingle and apply a small dab where nail penetrated shingle then push the overlapping shingle down and your done. The roof has a ridge vent and soffit vents. Fold a 4 by 2 inch piece of felt in half making a 2 by 2 inch square.

I have seen this condition on roof coverings that were failing but not on shingles that are in good condition. The building codes and building science for.