Subgrade and Foundation Material Depth Math for Subflooring

The 5 essential flooring transition profiles are: 1) T-Molding: joins two floors of equal height; 2) Reducer: smoothly slopes a higher floor down to a lower floor (e.g. 3/4" hardwood to 1/4" vinyl); 3) End Cap / Threshold: caps flooring against vertical stops like sliding glass doors, brick fireplaces, or thick carpet; 4) Stair Nose: creates a safe rounded bullnose edge at step drops; and 5) Quarter Round / Shoe Molding: conceals the 1/4" perimeter expansion gap along baseboards.

Close up of a solid wood flush reducer transition profile bridging hardwood to lower tile floor

Published 2026-03-01 · Updated 2026-03-01 · 8 min read

Transition Selection Matrix by Flooring Height Match

Choosing the correct profile prevents tripping hazards and allows floating floors to expand and contract freely.

Worked Example: Transition Package for a Whole-Home LVP Installation

Specifying transition profiles for a 4-bedroom house with 8 doorways and 1 stair landing.

Factoring $579 for transition moldings ensures a clean, code-compliant finish across all floor junctions.

What is the difference between quarter round and shoe molding?

Quarter round is a true 3/4" × 3/4" radius quarter circle, while shoe molding is narrower (1/2" wide × 3/4" tall), providing a sleeker look that doesn't stick out as far into the room.

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