December 28, 2021

Signs Of Poor Roof Ventilation

Having a well insulated roof is essential to keeping your building energy efficient and comfortable. There are, however, two sides to the insulation coin. Insulation impedes airflow, so you need to ensure that your roof is properly ventilated when it’s insulated.    Without knowing a lot about insulation and roofing, it can be hard to tell whether or not your roof is properly ventilated. You can always ask for an inspection or conduct an energy audit to get a better idea. What we present here, however, are four signs that you need to improve your roof’s ventilation as soon as possible.   

Increased cooling costs

When you have poor ventilation, it’s hard for heat to escape from your attic. That can lead to higher cooling costs in the summer. You can tell if your attic is poorly ventilated by checking if the temperature in your attic is much higher than the temperature in the rest of your building. In most setups, AC systems won’t be actively cooling your attic, so a very hot attic is a telltale sign of poor ventilation.   

Moisture in the attic

A lack of roof ventilation doesn’t just mean air will have a hard time circulating out of your building - water will too. Moisture can become trapped in your attic, leading to mould and mildew growth, as well as potential rotting around the structure of your roof and your insulation.   

Water damage in your building

As you can imagine, when moisture builds up in your roof, it can begin to find its way into the rest of your building. Water can seep its way into your walls, through your insulation, down toward the main area of your building, and more. All that for moisture? Hard to believe, but it’s true - with poor ventilation, all the moisture from your building - showers, hand washing, dishes, cooking - can end up building up in your attic.   

Ice dams in the winter

We’ve already discussed how a poorly ventilated roof can mean a very hot attic. You may be surprised to learn that this can lead to ice dams. It seems contradictory - why would a hot attic lead to ice buildup? The answer can be found in melting snow. As snow builds up on your roof, the heat from inside your poorly ventilated building will melt it. That melted snow turns to water, which flows down the sides of your roof until it reaches a point where your roof no longer heats it past freezing - that point is usually somewhere around your gutters. The water then freezes again, causing an ice dam.  

We can improve your roof’s ventilation

If you’ve experienced any of the symptoms of poor roof ventilation, or if you want an inspection to ensure your roof is properly ventilated, give us a call. We can inspect and improve your roof’s ventilation. Call us today, or visit our site for more information

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