Asbestos Floor Tile & Mastic Testing
Pull up old carpet in a Simi Valley home and there’s a decent chance you’ll find them: 9-inch-by-9-inch tiles, often dark, sometimes brittle, glued down with black adhesive. That’s textbook asbestos-era flooring — the tile AND the mastic under it are both suspects. One lab test tells you what you’re standing on before your flooring project turns it into dust.
The Flooring Materials That Test Positive
Asbestos made flooring tough, which is why it’s still down there — often under two or three newer layers.
9×9 Vinyl Asbestos Tile
The signature. That size is practically a date stamp — 9×9 was the standard format of the asbestos era. Common colors: dark green, brown, red, marbled patterns.
12×12 Early Vinyl Tile
Size alone doesn’t clear it — early 12×12 tiles from the 60s and 70s frequently contain asbestos too. Era matters more than dimensions.
Black Mastic Adhesive
The cutback adhesive under old tile is its own separate asbestos suspect — and it often stays on the slab after tiles come up. Tile and mastic get tested separately.
Sheet Vinyl & Linoleum Backing
Old sheet flooring often has asbestos in the paper backing — the layer that shreds when the sheet is pulled up.
Layered Floors
Simi Valley homes on slab foundations often carry every flooring decision since 1965, stacked. We test the layers your project will actually disturb.
Stair Treads & Cove Base
Rubberized treads and cove base from the era, plus their adhesives, round out the usual suspects.
Found old tile under the carpet? Stop there — that’s the right moment to call.
Call [PHONE]Why Flooring Projects Go Sideways Without a Test
Removal is the disturbance
Intact tile lying flat under carpet is generally not an active hazard. Prying, breaking, chipping, and grinding is where fibers get released — and that’s exactly what tile removal is. The test determines whether your demo day is ordinary work or licensed abatement.
Grinding mastic is worse
Flooring installers routinely grind old mastic smooth before laying new floors. If that black adhesive contains asbestos, grinding it aerosolizes it through the whole house. Every flooring contractor worth hiring will want the mastic answer, not just the tile answer.
Your installer may refuse without it
Reputable flooring companies in Ventura County increasingly require testing documentation before they’ll demo old floors in pre-1980 homes — their crews’ safety and their license are on the line. Showing up with a lab report keeps your install date.
Positive doesn’t mean project over
Plenty of floors test positive and the project proceeds anyway — with the right path. Options range from licensed removal to encapsulation to floating new flooring over the old, depending on material condition and what you’re installing. We explain the options; you keep control of the budget.
How Flooring Testing Works
Tell us the project
What’s coming up, what’s going down, and what you found. Photos help — we can often tell you over the phone whether testing is warranted.
Sampling visit
Small samples of each distinct flooring layer and adhesive your project will disturb — wet methods, sealed containers.
Accredited lab analysis
Tile and mastic analyzed separately. Results in a few business days; rush available when your installer is scheduled.
Plain-English report
What’s positive, what’s not, and what that means for demo, grinding, or going over the top. Documentation your flooring contractor will accept.
Serving Simi Valley’s Slab-and-Tile Housing Stock
From Wood Ranch to Santa Susana to central Simi, this valley’s 1960s-70s homes were floored in exactly the materials this page describes — and decades of carpet, laminate, and LVP have been layered over them since. Whether you’re opening up one room or redoing the whole house, we test the layers your project touches. CAC-led sampling, accredited labs, and reports accepted across Simi Valley, Moorpark, Thousand Oaks, Camarillo, Fillmore, Santa Paula, Ventura, and the west San Fernando Valley.
Doing a bigger remodel than just floors? A whole-home inspection covers flooring, ceilings, and walls in one visit — usually the smarter buy when multiple trades are coming.
Frequently Asked Questions
Are all 9×9 floor tiles asbestos?
The tiles are under carpet and not damaged. Do I have to do anything?
Can I just lay new flooring over the old tile?
What does the black glue under the tile have to do with anything?
What does flooring asbestos testing cost?
Test Before the Tear-Out
One visit, lab certainty, and your flooring project stays on schedule.
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