What is a cover block?
A cover block is a small block made of concrete. You put it under and beside the steel bars before you pour concrete. It is also called a concrete spacer.
The block holds the steel up. So there is a gap between the steel and the outside of the concrete. This gap is called cover.
Why use concrete cover blocks?
- Stops rust. The concrete cover keeps water and air away from the steel.
- Right gap every time. Each block has a fixed size, so the cover is the same everywhere.
- Made of concrete. It becomes part of the slab after you pour.
- Better than stones or broken bricks. They do not give an exact gap, and they can leave weak spots.
Our cover block types
Round cover blocks with binding wire. We make them in 15 mm, 20 mm, 25 mm, 30 mm, 40 mm and 50 mm. The wire lets you tie the block to the steel bar, so it does not move when you pour concrete.
4-way cover block. One block, four sizes. Each side gives a different cover: 20 mm for slabs, 25 mm for beams, 40 mm for columns and 50 mm for footings. Just turn the block to the side you need.
Where to use cover blocks
- Slabs
- Beams
- Columns
- Footings and rafts
- Walls and water tanks
Which size do I need?
Your building drawing tells you the cover size. On many sites, people use about 20 mm for slabs, 25 mm for beams, 40 mm for columns and 50 mm for footings. Always follow your drawing and your engineer.
How to use cover blocks
- Place the steel bars as shown in the drawing.
- Put cover blocks under the bars at an even gap.
- If the block has a binding wire, tie it to the bar.
- Check that the steel does not touch the shuttering anywhere.
- Now pour the concrete.
Cover blocks price
The price depends on the size and the quantity. See our cover blocks price page, or send us the size and quantity on WhatsApp. To count how many you need, use the calculator below.
Buy cover blocks in Rajkot
We make cover blocks in Rajkot.
