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Roofing Ventilation 101: What You Need to Know

The science and standards behind home roofing systems has really advanced since the 1940s. Back then roofs were usually built with clay tiles that were non-uniform and loose fitting. Things gradually got better and by the 1990s contractors were using what we would normally consider modern roofing tiles and shingles. The issue for many homes built during this period, however, is that construction was virtually airtight. This did not allow for proper ventilation of the attic or roof in general. This is a problem because it traps heat and moisture in the home. This causes shingles to deteriorate faster, increases the likelihood of mold and lowers your utility energy efficiencies.
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Why does your roof need proper ventilation?

Rock Top is all about using the latest technology and modern practices on our roofing and exterior design projects. Properly designed and installed attic ventilation systems are important for homes year-round. No matter the time of year, fresh air should flow continuously throughout the attic. The most effective and efficient way to create this current for exhaust is by using a ridge vent. Only ridge vents can provide a constant flow of air along the entire horizontal ridge along the top of your roof. With other exhaust vents, some pockets or sections of the attic can be left unventilated.

How roofing ventilation systems work.

Roofing contractors prefer ridge vents above other methods for exhaust because they are a perfect blend of functionality with aesthetics. In the summer, heat from the sun heats up in the attic and radiates heat throughout the home. If that hot air gets trapped in the attic, it will make your indoor air temperature uncomfortable and increase your energy bill. On the other hand, in the winter, moisture generated inside the home will condense in the attic. This will result in rot and mold. Your attic should remain cool in the winter so the snow on the roof melts slowly and evenly.

Here is a video that explains the process in an easy to understand way.

When soffit venting for air intake does not acost-effectiven a home, one of the most cost effective and efficient ways of ensuring there is adequate intake to match the exhaust capability is by adding DeckAir intake vents to the roof.
See video …

In order to maximize air flow for exhaust, there must also be an equal amount of intake. Perhaps you have heard of the Bernoulli Effect. For those who have not, it might sound surprising that the same principles that make flight possible also allows your roof to breathe. It starts by balancing out your air intake and exhaust vents.

The cost of adding proper ventilation to the attic and roof is relatively low compared to the cost of repairs when they are not adequately ventilated. Our team is happy to answer any questions. If you would like to schedule a roofing inspection, contact Rock Top today.