Typical roof vents

Looks like a normal roof doesn't it? This roof has only half the ventilation required by code. This will void the manufacturer's product warranty and have you spending 30% more on heating and cooling your home.

It might surprise you that seven out of ten roofs that we inspect on a daily basis for maintenance are under-ventilated. Most of these roofs are of the architectural composition type. Some very popular Portland, Oregon roofing contractors put on the roofs in the last 13-15 years.

Their popularity will prove to be short-lived, as their oversight will cost Portlanders millions of dollars in the lost service life of their roofing material.

The National Roofing Contractors Assoc. stated in 2007 that the number one cause of premature roof failure in America is improper ventilation. Why is this happening? Perhaps one reason is that most low cost, high volume roofers use roofing crews that get paid by the footage. Speed is the key. A supervisor stretched thin can only catch so much. The roofing contractor working on small margins will let things slide. A homeowner getting 15 years out of his 40-yr roof takes a distant second to his immediate needs. You spending 30-40% more in energy to cool and heat your home doesn’t even concern this roofing contractor. Do you see the problem here?

Here, a former hole was simply covered with roofing material, blocking ventilation

Here, a former hole was simply covered with roofing material, blocking ventilation

Damage from improper roof ventilation can include:

  • Roof granular (tiny rocks on your shingles) will fall off into the gutters
  • Spider cracks in the fiberglass mat.
  • Plywood underlayment will bow and de-laminate
  • Poisonous molds, mildew, and fungus can grow in your attic space.

If an under-ventilated roof is left to run its barrage of problems, the homeowner will have to replace the plywood, spray the attic space for mold and mildew damage, cut in the right amount of ventilation and then re-roof it again.

Don’t look to the manufacture of the shingle to help you with the costs of your replacement because their warranty was voided when the contractor under-ventilated the roof.

Toxic mold and moisture from poor ventilation

Toxic mold and moisture from poor ventilation

More mold from poor roof ventilation

More mold from poor roof ventilation

The first thing that Roof Life of Oregon does as a GAF Master Elite Roofing Contractor when called to your home for a roof replacement proposal is to check the attic.

Correct ventilation is a top priority in getting the full service life out of a roofing system. Both intake as well as exiting air is critically important. For every 200 square feet of attic space, a roof needs 64 cubic inches of intake/exhaust. This will keep the roofing cool and create a barrier of active air that will save you 1000’s of dollars.

We don’t stop there either; we continue roofing your home by installing complementary roofing components that will last you a lifetime.

A roof engineered to last a lifetime. Roof Life of Oregon has Portland’s only transferable lifetime workmanship warranty for roofing.

We’d be happy to come inspect your roof ventilation.


Rooflife Warranties

Our Workmanship Warranty is the key to keeping your shingle company’s warranty in place.

Lifetime Workmanship Warranty

Can we keep moss and mold from growing back? Yes. Yes we can.

No Moss Growth Warranty

We fix leaks for good.

No Leak Warranty

Meet Our CEO