LOMAXWhy concrete cover matters
Concrete cover is the distance from the concrete surface to the rebar. It protects the steel from corrosion and fire and ensures bond between rebar and concrete. Too little cover leads to rebar rusting and structural failure; too much wastes concrete and reduces load capacity.
What thickness is needed
The thickness depends on the structure type and service conditions (per SP 63.13330). Guidelines:
- Slabs and walls indoors — 15–25 mm.
- Foundations, structures in soil — 40–50 mm and more.
- Aggressive environment, outdoors — increased cover per design.
How to choose a spacer
A spacer is chosen by three parameters: the required cover, the rebar diameter and the plane (horizontal or vertical).
- “Bar chair”, “Base” — bottom cover in slabs and floors (horizontal).
- “Star” — side cover for vertical rebar (walls, columns).
- “Universal chair” — both horizontal and vertical.
The full range with diameters, cover thickness and prices is on the cover spacers. We'll put together a set for your project.
We'll select a splice for your project. Send your specification — a quote and price within 1 business day.
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