Attic insulation is an important element of your housing system, and using the correct amount is crucial to a balanced and efficient roof. Too much insulation can cause ventilation problems, while too little can contribute to heating or cooling issues in the home. The proper attic ventilation will keep attic temperatures evenly controlled and lengthen the life expectancy of a roof.
High attic temperatures during the hot summer months can cause roof shingles to buckle, deteriorate and distort over time. Spray foam on the underside of the roof deck can magnify the effects of heat and problems. Properly installed insulations will protect the home’s living areas from attic heat and save money on cooling costs. Having balanced ventilation, insulation will keep attic temperatures and humidity levels low to help prevent roof problems in the summer.
In the winter, poor ventilation can lead to ice dams and condensation. Without proper insulation, heated air from the inside of the home reaches the attic where it can create condensation on the roof deck and cause water damage to the wood. It can cause snow to slowly
melt on the roof creating ice dams which can impact your roofing system. Having proper insulation in cold weather will keep the warm air out of the attic and help avoid roofing problems. Learn more information about ice dams from our infographic.
R-Value and Climate
“R-value” stands for the insulation’s resistance to the flow of heat. Since R-value does not measure convection, radiation or air filtration, insulation type and thickness should be considered when choosing insulation. The Department of Energy recommends R-values between 30 and 60 depending on climate zones, although almost every zone allows for R-values up to R-60.
When installing a roof system, more or less is not necessarily better. A roof system works most effective when all areas function together properly.
Installing the proper amount of insulation in an attic requires that a contractor knows the recommended R-value for the climate you are located in and installing the right amount of insulation to meet the R-value.
Having too much insulation can lead to moisture buildup in the attic. This can cause wood rot, mold growth and create leaks that enter the living areas and damage the roof. Staying within the recommendations will combat these problems.
Few Words of Caution
Foam insulations have been an ongoing debate. Some think spray foam is more energy efficient, but some see the dangerous side. While foam insulation can make for a cooler (in the summer) or warmer (in the winter) living space and cut down costs, it negatively impacts attic ventilation. This can ultimately lead to improper air flow and create roofing problems.
Proper attic insulation and ventilation are critical to maximizing the life expectancy and efficiency of a roof. Combined with the components on an Atlas Signature Select® Roofing System offered by Sunset Ridge Exteriors – the roof is designed to help protect the home for many years. Contact Sunset Ridge Exteriors to learn more.