Stay on top of moisture and insect damage or pay the price

Jan 7, 2022

By Kym Pokorny, 541-737-3380, [email protected]

This news release is available online: https://beav.es/wki

Photo of water damage: https://flic.kr/p/2mVWguX

CORVALLIS, Ore. – Ignoring moisture and insect damage in the home leads to serious problems down the line. Annual inspection is essential to head them off.

Whether you do it yourself or hire someone, start your inspection by checking out this article from the Oregon State University Extension Service on home moisture problems to help solve many problems you might encounter. If you plan to inspect, maintain or repair yourself, begin by taking a tour around the exterior of the house.

Does water wick up the foundation? This indicates a need for better soil drainage next to the foundation.

Are there plants or tree branches that touch the house? These make perfect thoroughfares for carpenter ants to enter and leave. Trim plants back at least 24 inches from the house.

Don your raincoat and go out during a downpour or snow melt and examine the gutters and downspouts. Are there breaks or leakage? Examine the area around and under decks for rot, especially where the deck attaches to the house.

Now comes the fun part. Put on coveralls, gloves and a stocking cap. Arm yourself with a head lamp or flashlight and a screwdriver and crawl under the house.

Is there a layer of plastic on the soil floor of your crawl space? There should be. Plastic provides an excellent vapor barrier that helps prevent decomposition of joists and other support structures. Inspect the sill plate, (the wood between the foundation wall and the floor members) for rot and insect damage. Newer houses should have sill plates of pressure-treated wood.

Examine floor supports for rot and insect damage. Tap on suspect wood with the screwdriver to test how solid it sounds. Is there any sawdust on the ground or in spider webs? Note its location and brush it away so you can tell next time if damage from carpenter ants is still occurring. Remove any rodent nests, a source of mite, flea, lice, bed bug and tick infestations.

Check for mud tubes on foundation walls and supports – they are a sign of termites.

When you have crawled back to the outside world, write a brief report to use for comparison next year.

You are not quite done yet. Now go indoors for an inspection.

First check the attic. Are there wet spots? These indicate a leaky roof. Check for and remove all signs of animal nests.

Next, check for rot and insect damage just like you did in the crawl space. Finally, inspect under the sinks in the bathroom and the kitchen. Gaps in pipes that pass through the wall are perfect avenues for mice and rats. Seal these spaces with tin or steel wool. Check for leaks and damage.

Now write up an indoor inspection report. And then congratulate yourself. You’ve come a long way in protecting your house from insect and water damage.

What should you do if you find an infestation?

First, don’t panic. Chances are the damage has been there awhile and a few more months isn’t going to make any difference. Treat carpenter ant nests around mid-April when the nests are active. Termite and carpenter ant colonies should be treated by professional exterminators.

To eliminate rot problems, the source of the water or moisture should be eliminated before the rotten areas are replaced.

About OSU Extension: The Oregon State University Extension Service shares research-based knowledge with people and communities in Oregon’s 36 counties and the Confederated Tribes of Warm Springs. OSU Extension addresses issues that matter to urban and rural Oregonians. OSU Extension’s partnerships and programs contribute to a healthy, prosperous and sustainable future for Oregon.