San Diego County, San Diego Rat Control Situation:
Hi David, Is a UV blacklight still useful, exterior-wise, if it rains after the rodents leave their urine stains? I am in the process of performing exterior maintenance to better exclude my roof rats. 1) I have a 25 year old cedar shake roof in San Diego California with openings under each shake along the rake edge of the roof at the gable ends of my house. There's no drip edge, i.e. under the shakes I have roofing paper (now somewhat curled) that runs more or less up to and rests right atop the fascia board. Because I have skip sheathing, and since the cross section of a shake is a wedge that is up to one inch at the upper, thick end, this appears to create many huge entry points along the rake edges even though the sheathing is rabbeted into the fascia board. As a result, I'm thinking of getting a UV blacklight to use outside the house to sleuth for urine stains along the upper edge of the gable end shakes and fascia boards. My question is, how easily does the winter rain wash away the urine, rendering this a pointless exercise? 2) I noticed a new product called "rat-out gel" and was thinking of applying it along the rake edges mentioned above. Or, maybe I should just buy many rolls of X-Clude and use that instead. Or maybe both. Any comment? Thanks very much for your website, Doug
My response: First off, I do not have experience using UV lights to detect rat urine. But I do suspect that rain will severely limit the effectiveness of this approach. I have never heard of Rat-Out Gel or XClude, but I typically stick to physical barriers rather than repellent type devices. If your roof makes this impossible, you might have a tough time keeping the rats out.
San Diego Rat Control Tip of The Week
How Do I Inspect My Home For Rat Entry Holes?
Rats can be tough to manage when they get access to a property. Their population will increase quickly and they will cause a great deal of harm to pretty much everything chewable insight. Truly, they lead to a major issue for homeowners, yet their activities can be controlled and they can be removed if managed properly.
It is of the most extreme significance while dealing with a rat infestation to identify their entry points and block them. Otherwise, they will return every time you try and expel them. Investigating a house for rat passage openings can be cumbersome as the list of spots to check is seemingly endless, especially when the house is big.
Attics, space vents, dividers, kitchens, cupboards, soffit vents, pipes, roofs, rooftop vents, etc. are some of the spots to assess. The following will help you in doing an exhaustive investigation of your home.
1. Have Fundamental Information On Rat Science
Information on their nature, habitat, appearance, diets, and behavior will help you figure out where their entry points are likely going to be in your home.
2. Information On The Architectural Plan Of The House
This also is significant. Finding out about the house's plan would help identify those shrouded spots where openings may exist in parts of the house, and these gaps might serve as rats' openings.
Having watched every one of these, property holders must check everywhere, including foundations, vents, rooftops, soffits, and so on. Anyplace there is a gap, regardless of how little it is, is a potential entry point. It may surprise you that rats can enter through holes as small as a quarter of an inch.
