Importance of proper insulation and ventilation in residential roofing

Asphalt shingles are go-to roofing material because of their popularity on roofing market today. A skilled roofing professional will consider two more things that are vital for any roofing system– insulation and ventilation. That is not enough; roofing system still needs to provide you with protection against structural damage, mildew, high energy bills and mold. This is where insulation and ventilation come in.

Insulation and Ventilation


Constant and consistent airflow if allowed and provided by ventilation. All that streaming air that runs under your asphalt shingles prevents the buildup of cold, moisture and heat under your roofing system. Your attic can become too hot during summer if your ventilation is poor. All that heat coming from attic can easily harm your shingles and reduce their expected lifespan. On the other hand, if you have poor ventilation, during the cold months it can lead to building up of cold air in your attic which in turn can lead in rising levels of moisture. Moisture is a breeding ground for dry rot, mildew, and mold which can cause different problems to your insulation, shingles and roof support structure. That is why it is vital to properly ventilate your roofing system during installation. That way you can avoid having numerous problems and costly repairs to make.


Insulation is an element of an asphalt roofing system which you should not overlook during the installation because if not done correctly, insulation can cause you so many problems. If your home is not properly insulated, you will have problems with extreme temperatures. Bad insulation is a common thing for older homes which were built back in time when building codes didn’t ask for that much insulation compared to today’s codes. Poorly insulated attic can be a nightmare to every homeowner because the need for heating and cooling systems will be much higher. It is clear that asphalt shingles roofing system requires proper attic insulation and ventilation, however, meeting that requirements aren’t always that easy and straightforward. You should ask a professional roofing contractor what type and amount of insulation and ventilation your existing roofing system needs. It is important to be optimal.

What can your roofing contractor do?

The first thing your contractor will do is to find what is blocking the airflow through your attic. The most typical problem lies in insulation or some other material blocking the opening of the vent, and your roofing contractor will remove that obstruction. Sometimes, poor ventilation is caused by a deficient intake or exhaust of air or even bad placement of the vents