Healthy Roof Ventilation

Knowledge is Power: Know Your Roof – Ventilation

Posted on November 29, 2016 · Posted in Roof Maintenance, Roofing Education, Supporting Our Customers

Now that you have read our blog about roof anatomy, and if you haven’t click here — let’s talk about your roof’s ventilation.


Ventilation/ Air Flow

A healthy ventilation system is an essential component of your roof. It keeps a consistent flow of cool, dry air through your attic — this requires air intake (typically eave and soffit vents) and exhaust (through ridge vents).  In case you’re not familiar with the terms, the soffit is the material on the underside of


the eaves (overhang) of your roof, a gable is on the ends of the roof rise, and ridge vents are installed at the peak of the roof (see illustration on the left).



Improper ventilation can wreak havoc on a roofing system.

Since no one wants to throw money down the drain, or in this case off of the roof, we have armed you with knowledge of what to look for and how to address some of the problems. Remember this about your roof’s ventilation;  increase airflow = increase cash flow!

Here are some of the problems poor ventilation can cause:

  •        Premature aging
  •        Cracked or curled shingles
  •        Cracking in wood decking
  •        Increased temperatures in living areas during warmer months
  •        Reduced energy efficiency
  •        Water stains along your ceiling
  •        Increase in moisture build-up in the attic during cold weather from activities that create condensation (such as showers, laundry, cooking).
  •        Mold growth

Believe it or not, your roof can speak to you.  And when it does, you should listen. Many of the not-so-fun issues that a poorly ventilated roof can cause can be avoided, or at least lessened, by knowing what to look for.

Signs your ventilation might need attention:

  •        High temperatures in the attic during summer months  roof-vents-2
  •        Condensation
  •        Delamination of sheathing
  •        Loosening or warping of the roof’s shingles
  •        Ice dams

If you are concerned about your roof’s ventilation or are experiencing any of these signs, Horch Roofing recommends having it evaluated immediately by a home energy auditing professional; they can assess your roof’s ventilation functionality.

Below is a list of a few simple rules to help you avoid roof troubles associated with poor ventilation:

  1. Check intake airflow – be sure your soffits vents are perforated.
  2. Check escaping air flow – be sure your gable and/or ridge vents are unobstructed.
  3. Check your insulation – prevent heat from escaping into your attic by ensuring you have the appropriate thickness of insulation.

Up Next!

We’ll explain and discuss the function and importance of other structural elements listed in our blog post. We hope to arm you with valuable knowledge that will enable you to advocate successfully for your roof in an informed and timely manner — helping you to avoid as many menacing or costly problems as possible.

Horch Roofing is Midcoast Maine’s largest and most experienced roofing contractors.  We have been roofing Maine homes in Rockland, Camden, Thomaston, Rockport, Union, Warren, and Waldoboro since 2002, and continue to offer the best-quality roofing job to our clients.  For more information, visit our website at, our Facebook page at or give us a call at (207)-273-1111.