NOTE: The responsibility for determining if the existing poured-on floor is well-bonded to the concrete, and is not textured enough to show through the final installation, rests with the contractor and the installer.

	Polymeric Poured (Seamless) Floors (1)	Metal – Steel, Stainless Steel, Aluminum, Lead, Copper, Brass, Bronze (2)	Metal – Steel, Stainless Steel, Aluminum, Lead, Copper (2)	Metal – Steel, Stainless Steel, Aluminum (2)	Metal – Steel, Stainless Steel, Aluminum, Lead (2)	Ceramic Tile, Quarry Tile, Terrazzo and Marble (3)
Vinyl Composition Tile (VCT)	X	X				X
Static Dissipative Tile (4)	X	X
Heterogeneous Sheet Homogenous Sheet	X			X	X	X
Commercial Luxury Vinyl Tile	X			X	X	X
Residential Luxury Vinyl Tile/Plank	X			X		X
Engineered Tile (Alterna) (with or without grout)	X			X		X
Fiberglass-Reinforced Sheet ToughGuard II Sheet	X			X		X
Locking (Floating) Rigid Core	X	X	X	X	X	X

Footnotes

(1.) All Armstrong resilient flooring may be installed over polymeric poured floors. For resilient flooring installations other than Rigid Core, the surface must be roughened and then a Portland cement-type underlayment applied. A thickness of at least 1/4″ of an appropriate cementitious patch or leveling compound must be applied to make it porous enough to install SDT.  

Polymeric poured floors must be well cured, have no history of moisture related problems, be free of any residual solvent, smooth, structurally sound and well bonded to a concrete subfloor. Loose or damaged areas must be completely removed and patched with an appropriate cementitious patch or leveling compound as necessary. Remove any “nubby” texture with wet, sharp sand and a floor machine equipped with carborundum stones. Do not use a skim coat of latex underlayment to smooth the surface as it will not adhere reliably to the poured-on floor.

(2.) Armstrong Flooring® resilient flooring may be installed over metal substrates subject to adhesive selection. Refer to Adhesives for specific adhesive recommendations. 

Metal substrates must be installed according to the manufacturer’s recommendations and must be roughened and cleaned before installation of the floor covering. If there are low places, they should be leveled of an appropriate cementitious patch or leveling compound.

(For some adhesives to be installed on metal, the surface must be roughened and then a Portland cement-type underlayment applied at a minimum of 1/8” thickness.)

(3.) All Armstrong Flooring® resilient sheet floors and tile may be installed directly over ceramic tile, quarry tile, terrazzo or marble subfloors on all grade levels which are firmly bonded to a structurally sound substrate.

Clean the floor of all paint, varnish, oil, wax and finishes. Roughen glazed or very smooth surfaces and repair badly fitted joints or cracks with S-466.  If the floors are badly worn or have low places, they should be leveled with S-466

(4.) To install SDT over metal, the surface must be roughened and then a Portland cement-type underlayment applied to a depth of at least 1/4″ to make it porous enough to install SDT.

To install SDT over ceramic tile, quarry tile, terrazzo or marble, the surface must be roughened and then a Portland cement-type underlayment applied to a depth of at least 1/4″ to make it porous enough to install SDT.