Inspection Unit 4B

Prevention Part 2

This section covers how to help your clients prevent future animal damage. Whether the customer has suffered animal damage or not, ethical inspectors educate clients about how to reduce the property’s attractiveness to home seeking animals.

(All photos on this page are by Stephen M. Vantassel)

Exclusion is the last strategy to reduce animal entry onto your property. The first step in exclusion is by keeping your house and buildings in excellent repair. Animals are exploitive; if they find a weak shingle or rotted wood they will claw their way through those materials to live in your warm attic. Keep in mind how attractive your house is to an animal. It has many advantages over a tree in that its warm, insulated, dry, and doesn’t sway when the wind blows.

The first area a homeowner should seek to secure is the attic vent. Screened vinyl vent. Photo by Stephen Vantassel The photo shows screening used on a vinyl siding. Here it is just bent around the screen frame, no screws. (You want to be careful making holes in siding and anywhere else in your home as it could encourage water damage). Squirrels often enter buildings by chewing or pushing through the mosquito netting screen which keeps insects out of the attic. Ideally, all attic vents should be secured with ¼-inch wire mesh on the exterior of the building so as to protect the wooden louvers and the mosquito netting. I strongly recommend that the screen be screwed into place at each corner and then stapled securely around the remainder of the perimeter. Quarter inch wire mesh will protect the attic not only from squirrels but bats as well. If you are concerned about aesthetics then secure it on the inside. However, be sure that the mesh is towards the exterior of the building so as to protect the mosquito netting from potential damage.

All chimney flues should be capped. Capping a chimney flue not only prevents animal entry but it protects the chimney from water damage. Customers usually ignore my advice to cap their chimneys. They just don’t believe that raccoons and squirrels enter chimneys until it happens. Raccoons generally reside in chimneys from March-June to raise young. Squirrels often will be found in basements during the months of Jan/Feb and Oct/Nov because they fall down the furnace flue while looking for a potential nesting site. The cap you have placed on your chimney should be professionally manufactured so as to follow proper venting guidelines. Don’t use screening to cover a chimney because heavy snow and/or freezing rain may accumulate on the mesh forcing the gases back into the house (see image below on how NOT to cap a chimney. Photo by Stephen M. Vantassel). How not to cap a chimney. Photo by Stephen M. Vantassel

If you cap your furnace flues, I strongly recommend that you obtain a carbon monoxidestainless steel multiflue chimney cap. Photo by Stephen M. Vantassel detector. Oil and especially gas burning furnaces exhaust a great deal of moisture as a by-product of combustion. The manufacturers worry that this moisture could freeze on the cap (during extreme cold temperatures) and thereby force the gases back into the house. While not aware of this phenomenon happening anywhere in the U.S., you should be prepared for it. Finally, all caps should be of stainless steel construction. (See photo at right of a stainless steel multi-flue chimney cap. Photo by Stephen Vantassel)  Although they generally cost about twenty dollars more, they are guaranteed for life against rust and corrosion.

Good example of trenchscreening. Photo by Stephen M. VantasselPorches, mobile home and sheds can be protected from burrowing animals, like skunks, by constructing appropriate barriers. The best barricade consists of laying a wire mesh skirt perpendicularly away from the wall of the porch. This floor skirt should be 2-3 inches below the soil’s surface and extend out at least 12 inches. Then secure some galvanized ¼-inch or 1/2-inch hardware cloth to the wall and at the base of the trench bend it out so that it will extend one foot away from the structure. This type of barrier prevents animals from digging under the structure. No matter how far the animal digs it will keep meeting mesh. (Photo by Stephen Vantassel).

Have your client act on these recommendations and the likelihood of his ever having a problem with wildlife will be greatly reduced. However, should he ever need help in controlling an animal damage problem, be sure he contacts a licensed problem animal controller. For they are the individuals licensed to handle these situations.

Finally understand that these are introductory recommendations. In no way, should you consider them complete. Visit http://www.icwdm.com to learn more.

©2005 Stephen M. Vantassel

Unit 4 Lesson C