Rusty Nails In Roof Vents

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.

Rusty nails in roof vents.

Fold a 4 by 2 inch piece of felt in half making a 2 by 2 inch square. I can see the roofing nails that protrude into the attic are dripping wet. All of those things will add to the moisture in the attic and will rust any metal exposed there. Some of the nails appear rusty.

Frost later melts off of these nails and drips onto the floor below. Over time your roof vent may become rusty. Winter condensation on the nails even forming frost in freezing weather rusts the nails and stains the roof sheathing around them. What is up with this.

The roof covering is an asphalt shingle and it appeared in good condition with no visible defects. I have noticed the last couple of winters that when i bring something down from the attic it has rust spots on it. During the attic inspection i noted water stains around the roofing nails. The building codes and building science for.

The roof has a ridge vent and soffit vents. Rust stains on metal roofs including particularly steel roofs may be occur at nicks or gouges in the protective coating or they may be swarf stains caused by leaving the products of roof cutting shards shanks nails rivets or any discarded steel object on the roof surface. I have seen this condition on roof coverings that were failing but not on shingles that are in good condition. Indications that your attic might have a ventilation problem include wet or compressed.

New decking on it all and dimensional shingles. Vent roofs with steeples towers or cupolas can be found in different buildings from barns to cathedrals. I had a new roof put on my house 3 years ago. 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.

You to have the vent replaced. Instead with a little effort you can help revive your vent and have it fight off the rust attack. Use a small trowel or caulk gun to apply 1 2 teaspoon of asphalt cement to the hole under the shingle. 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. I would recommend doing this on a sunny day and after exposed to sun for a few hours.