Best roofing practices: The importance of proper roof ventilation

By Wade Griffin Roofing | March 5, 2014
Bad roof ventilation

Signs of bad roof ventilation

As part of our best roofing practices series of articles,  we’re showcasing a few of our recent jobs to demonstrate proper installation and consideration of roof ventilation.  This house doesn’t have a ridge vent which provides proper ventilation. The “nail pop” is from expansion and contraction of the roof deck which over time works nails up through the shingles. On this house the money not spent when the roof was replaced is now causing a leak and meant additional costs to the homeowner. The other photo shows blistered shingles less than 8 years after replacement. Proper ventilation will not make shingles last forever but it does enhance their performance.  Simply put,  roof ventilation is paramount.

The installation of ridge and gable vents in this photo above would have prevented the premature failure of this roof.  It’s unfortunate that the customer took the least expensive option when replacing this roof less than 8 years ago. A proper installation with the right materials would have lasted at least twice as long.  Good roof ventilation makes certain that there is airflow in and out of the structure which is adequate enough to allow for natural air movement. The cross-ventilation of air around the roof helps maintain more steady temperatures. Since internal (attic) temperatures more closely match those outside the roof, the roofing material is not stressed to the point where it buckles.

March 5, 2014