Loose Lay Vinyl Flooring is produced with a unique anti-slip backing, the installation process is simple, the planks or tiles are installed by butting the edges tightly. This provides for an impressive finished lool, but also provides a high degree of stability. This flooring  therefore donesn't require adhering to the subfloor or expensive subfloor prepareation that traditional flooring needs. Larger installations may require adhesive around the perimeter. Expansion gaps may not be required.

Loose Lay Specification:
Thickness: 4.0 / 4.5 / 5.0mm
Wear layer thickness: 0.3mm / 0.5mm / 0.55mm / 0.7mm
Size: 914.4 * 914.4 mm (36" * 36") / 457 * 457mm ( 18" * 18") / 304.8 * 609.6mm (12" * 24") / 228.6 * 1219.2mm (9" * 48") / 228.6 * 1828.8mm (9" * 72") / 184 * 1220mm (7.25" 48").

Pros:
Many types of flooring expand and contracts with moisture, but this isn’t much of an issue with loose lay vinyl floors.
High Durability
Absorbs Sound
Available In A Wide Variety Of Looks
Comfortable
Cons:
Only Available In Plank Format
Must Be Installed With Care
Can Develop Seams