What Is Tongue and Groove Flooring?

What is the process called "tongue and groove" joinery as it applies to wood, laminate, and luxury vinyl flooring? It secures two boards together.

What should I know about tongue and groove hardwood flooring?

Laying Tongue & Groove Hardwood Decking (or Siding) as Interior Floor

What Is Tongue and Groove Flooring?

Tongue and Groove Porch Flooring Installation Guides

Tongue and groove flooring - Siero Lam

Tongue and Groove Porch Flooring Options - All You Need to Know

What Is Tongue and Groove Flooring?

What Is Tongue and Groove Flooring?

1 in. x 6 in. x 12 ft. #2 Southern Yellow Pine Tongue and Groove Flooring Board SY20106ALFL - The Home Depot

Ripping out 1950's house tongue and groove wood floor : r/Renovations