From beading and thresholds to door bars and moisture barriers
Flooring accessories are rarely given as much thought as the floor itself, but getting them wrong results in a finished installation that looks incomplete or that develops problems over time. The gap-filling beading, the threshold strips at doorways, the door bars between different floor levels, and the expansion gap management at walls are all part of a complete, professional result.
This guide covers the accessories needed for a standard residential flooring installation, explains what each one is for, and gives guidance on specification and matching.
Scotia and Beading
A floating wood or laminate floor requires an expansion gap of around 10mm to 15mm between the perimeter of the floor and all fixed walls and obstacles. This gap accommodates the seasonal expansion of the boards and prevents the floor from buckling. The gap is covered by a flexible profile called scotia or beading, which is fixed to the wall or skirting (not to the floor itself) and drops down to conceal the gap.
Scotia beading is available in solid wood, MDF and flexible rubber profiles. Wood and MDF profiles should be ordered in a colour that matches the floor, the skirting board, or a neutral tone. Most flooring manufacturers and suppliers offer coordinating accessories in the main floor colours. Flexible rubber or vinyl profiles are sometimes used instead of wood beading in kitchens and utility rooms where moisture resistance is more important than appearance.
Threshold Strips and Door Bars
Where a floor meets a different floor level or a different material at a doorway, a threshold strip or door bar covers the transition. Several profile types are available for different situations: a T-profile covers a single-level transition where two floors of the same height meet; a reducer ramp transitions between two floors at different heights; an end profile creates a clean edge where the floor terminates at a step or a threshold to a tiled surface.
Threshold strips are available in aluminium, stainless steel, and wood-effect MDF or PVC. Aluminium strips in silver, chrome or brushed bronze are often used where the floor meets a tiled kitchen or bathroom entrance. Wood-effect or matching-timber strips are used where a continuous wood floor appearance through a doorway is preferred.
Stair Nosings
Where a hardwood or engineered wood floor continues on to stairs, stair nosings provide a finished edge at each stair front. The nosing needs to match or complement the floor, and it must be secure and non-slip given the safety requirements of stairs. Solid wood nosings matching the floor species and colour are available from most quality floor suppliers. Bullnose and half-round profiles are the most common shapes.
Some engineered wood manufacturers offer coordinating stair nosings pre-finished to match their board range exactly. These are worth specifying wherever the floor runs to stairs, as they ensure a consistent visual result throughout the space.
Silicone, DPM Film and Moisture Barriers
In wet areas adjacent to a wood floor, such as where a wood floor meets a kitchen splash zone or a bathroom threshold, a bead of flexible silicone sealant at the expansion gap helps prevent water ingress. Use a silicone colour matched to the beading or floor colour. Avoid filling the expansion gap with a rigid sealant; flexible silicone allows movement while still providing a water-resistant seal.
Damp-proof membranes (DPM film) or liquid DPM applied to concrete subfloors before laying a wood floor are not strictly accessories but are essential to the installation in many situations. Where residual moisture is present in a concrete subfloor, a DPM prevents moisture from migrating into the floor covering.
- Scotia or beading: required for all floating floors to cover expansion gaps
- T-profile threshold strips: between two floors at the same level
- Reducer ramp: between floors at different heights
- End profile: at steps and raised thresholds
- Stair nosings: where wood floor continues to stairs
- Silicone at wet-area boundaries: prevents water ingress at expansion gaps
- DPM or moisture barrier: on concrete subfloors with any moisture risk
Ordering accessories at the same time as the floor makes practical sense. Matching colours, species and profiles are most easily available from the same supplier, and having all accessories on site before the installation begins avoids delays and the disappointment of finding that the beading you ordered as an afterthought does not quite match the floor it is meant to complement.
