Ventilation

Make-up Air

Make-up air:  The volume of air that is required to replace exhausted air from a given space.

If you have gas appliances,  a well weatherized and insulated home, and exhaust fans check out the following video for a serious consideration….

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You may have a ventilation issue on your New home.

People are not perfect.  Despite the name of my business my inspections are not perfect, but I strive everyday to make them as close as I can.  People build homes and no matter what there is always something that could be adjusted, maintained or updated to help the home be more “perfect.”

These improvements can sometimes be debatable but some things, like the proper ducting and expulsion of bathroom exhaust, are not negotiable.

The little exhaust fans in the ceilings of our bath and laundry areas and often forgotten about.  These little fans can collect and concentrate significant amounts of moisture.  If the vapor that they collect is not expelled out of the home it can cause moisture related issues like deterioration, fungus, termites, beetles, ect…

Traditionally the fans are ducted with a flexible metal duct up to a roof vent.  Where the air that is leaving the attic carries the moist bathroom air up and out of the attic.  It is currently acceptable to vent the ducts to the soffit but I am definitely not a fan of this idea because the soffit vents are intakes andall of the warm moisture laden bathroom air that is blown out of these vents is usually separate back into the cool attic. (Find more of my disdain towards bathroom vents exhausting at the soffit vents.)

missing hole for Salem Oregon attic vent

I popped my head up into a new home’s attic the other day during a home inspection and noticed something was missing. The bathroom bans all worked fine, the ducting was routed properly up to the upper roof vents, there was just one key component that was not installed properly….

The hole for the roof vent, although cut through the OSB sheathing, had not been cut through the roofing shingles and building paper.

The home was so new there had not been any substantial moisture added to the attic and repairs simply involved cutting a hole.

improperly installed attic vent in this Salem, Oregon home.