Roof Ventilation

Roof Ventilation

Baffles keep attic insulation off your roof deck during all seasons but in particular summer months or in a climate that is warmer most parts of the year, or during cold Michigan winters.


During the winter months, a home is more susceptible to the formation of condensation where the attic insulation contacts the roof.


If you go up into your attic, look for baffles between rafters. Keep in mind not all rafter need baffles, just those with intake vents at the soffit.


If you don’t have baffles installed, check your intake vents for any type of blockage for insulation or debris. This can be cumbersome since you will need to squeeze to the corners of your attic. It is recommended you wear a mask and cover skin (no short sleeves or shorts) to prevent contact with insulation, dust, and debris in the attic.

Check For Fake Venting

Never assume you have venting just because you have the material on your home or building.  You must get in your attic and you must pull down your soffit and see if you have the proper ventilation.

Another reason for the lack of rafter vents may be a lack of intake vents.  Even when you see soffit vent screens on the outside of the home, you may learn you don’t actually have intake vents. 

To verify, remove soffit vent screens – if you do not see a hole cut through to the wood leading to the attic, it is not a vent.  Here in the Chicago metro area, this is far too common.


The good news is, soffit vents can be installed and are not very expensive.  Depending on the size of your home, the job can be done in a few hours with the right tools and experience.

Roof ventilation is key to your homes energy efficiency. Did you know that 9 out of 10 homes are poorly ventilated? This is why many roofing materials despite warranty fail within 10-15 years.
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