If you asked a a wood chuck, "How much air can a soffit vent vent if a soffit vent could vent air?
What would the answer be?
The concept is simple.
Air comes in, air goes out.
It's pure physics - it never fails.
Unless, that is, no air gets in.
That concept is simple too.
No air in, no air out.
Air has to move.
And when warm air is involved, and high and low pressures, convection happens.
So, pulling into the parking lot in front of a group of townhouses, I begin evaluating things from the car. I can't help it. It's a curse. It really is...
Looking up at the subject house, the one I'm there to inspect, I see this:
Looking at the other houses you would see something like this:
Noticing a difference? This wood chuck did.
Years ago these houses all experienced a bad hail storm and the original aluminum siding and roofing was replaced.
The subject house had a different contractor than all the other houses apparently. The subject house was the only one that looked like the upper photo.
What did this contractor not understand?
See the diagram above!
Air in, air out. Air no in, air no out.
The upstairs in this house was uncomfortably hot. The attic was extremely hot!
For how many years people had been living like this I don't know, but they did!
My recommendation: if your house looks different from all the others (if homeowners even notice something like this) there is likely a reason! The reason in this case is that the wrong material was used during the siding/roof replacement. This is the second such soffit I have seen in a month! And the second such resulting uncomfortably hot upper level. Physics works! Both ways. Air in, air out. Air no in, air no out. So, did you check with the wood chuck for the answer?
Jay Markanich Real Estate Inspections, LLC
Based in Bristow, serving all of Northern Virginia.
Office (703) 330-6388 Cell (703) 585-7560