Testing for LBP using instant test strips

[Chris Martin]

My apologies if this is covered already. I didn't see it specifically, so I thought I'd post.

In another BP topic about Lead Based Paint (LBP), I implied by my comment that a landlord should develop a best practice to test for LBP. This is my opinion and some investors may disagree. If you do disagree, I'd like to understand why. As a buyer, for property built before 1978, I want to know if LBP is present anyway. And for property owners or prospective owners, it's now very easy to test for LBP with off-the-shelf test kits that are about $10. As an example, I tested a piece of molding from a 1953 ranch, that was removed and painted.

Basically, the tester uses a swab to check for lead residue on painted (or laquered) surfaces. The test can also be invasive. The most effective way to test is to make a small cut with a sharp knife through all layers of paint and finishes. I usually make 2 small parallel cuts about 1mm apart, about 3/4" to 1" long. Probably best to ask permission before making invasive tests, but I try to test on less noticable areas like a painted window sill edge or the top of a painted molding. In the picture below (I know, a little out of focus) I made two small slits and swabbed the molding. The swab did not turn red. If the swab does not turn red, you want to verify the test strip is 'active' by using the test card.This test is complete and this piece of molding does not have lead present at the test location.

Basically, just follow the instructions on the kit. You can get them at Home Depot or Lowes. I'm sure they are cheaper via online sources. If the test strip turns red, like the swab on the right in the picture below, then there is lead on the swab and lead in/on the test sample. The image below was from the inside window sill of a kitchen window. The most common place to find LBP is on trim work and window components (trim casings, sashes, sills).

Having a 'negative' test result doesn't mean there isn't lead elseewhere. But in my experience, if I test a few similar locations (e.g. sills in two rooms) with negative results then I don't worry too much about my personal protection when making repairs.

Hope that helps.