Most Common Home Inspection Defects

Top Ten Home Inspection Defects

10.  Tree Branches Rubbing On The Roof

Tree branches do a lot of damage to roofs.  Just think about branches rubbing on the roof all day long while the wind is blowing.  This adds up to a lot of damage.  Tree branches too close to the roof will also give squirrels, raccoons, and other pests very easy access to the roof.

9.  Double-Tapped Circuit Breakers

Every circuit breaker in the main panelboard should have only one wire connected to it, unless the circuit breaker is designed for more than one wire.  Most aren’t.  When two wires are connected to one breaker, this is referred to as a double-tapped circuit breaker.  Sometimes the fix for this defect is very quick and easy, sometimes it’s a major project.

8.  Bath Fans That Don’t Exhaust

Properly I start my home inspections by turning on every fan in the house, and I make sure that air gets exhausted to the exterior.  I find a ridiculous amount of fans that make plenty of noise, but don’t move any air.  The problems can be caused by disconnected ducts, ducts that aren’t continuous to the exterior, blocked internal dampers, stuck external dampers, or kinked ducts.  A bath fan exhausting in to the attic is always the worst.  Every bathroom should have an exhaust fan.

7.  Missing / Improperly Located Smoke Alarms

Smoke alarms should be present in a common area on every level and in every bedroom, and the installation instructions need to be followed.  I can’t tell you how many smoke alarms I see tucked away into corners – this is never an acceptable installation, because smoke won’t get there fast enough.

6.  Missing Cover Plates

Missing or broken cover plates at outlets and switches are shock hazards, period.  Common problem, easy fix.

5.  Improperly Wired Outlets

Ungrounded three-prong outlets and outlets with reversed polarity are very common defects.  These are shock hazards.  You can check the outlets in your own home with an outlet tester that costs about five dollars.

4.  Missing Carbon Monoxide Alarms

Minnesota requires carbon monoxide alarms within ten feet of every sleeping room.  Lots of people put them in the same room as the heating plant; manufacturers actually advise against this.

3.  Poor Water Management

This consists of the same thing every time – negative grading and improper downspout extensions.  This is almost always the cause of wet basement and foundation problems.  The grading around the house needs to slope away, and downspout extensions should take water well away from the house.  Improper downspout extensions are worse for the foundation than no gutters at all.

2.  Missing Anti-Tip Devices At Ranges

Ranges have been sold with anti-tip brackets since 1991, but it’s pretty rare for me to find the brackets installed.  These are required to prevent ranges from tipping over, which could cause serious injury or death to a child.

1.  Attic Bypasses

I find these all over the attic on almost every pre-19991 house I inspect.  Attic bypasses allow conditioned household air to leak into the attic space, and they can reduce the effectiveness of insulation by as much as 70%.  Warm air leaking into the attic leads to ice dams, frost in the attic, deteriorated roof sheathing, mold in the attic, and then ceiling stains in the spring when the frost melts.