The Heras fences are very popular in the UK as perimeter fencing around construction sites and we now offer a water filled block that can be used for the Heras fences and a wide range of other fence panels.

rotoblock site safety barriers with mesh panels

Unlike the original Heras feet these are easily visible in Red and White and each block can take a maximum of 105 kg.

Mira Tested wind speeds on a 3.5 metre Heras panel in the following configurations giving stability at up to 73 mph winds.

mira wind testing for rota blocks

The original Rotablock is still available and offers 3 years of proven performance withstanding 62 mph winds on a solid 2 x 2 metre hoarding panel.

heras solid panel wind tested


rotablock easily moved filled and emptied on site

• Small size for easy transport and handling
• Footprint is less than standard feet
• Fits various fence lengths
• Fits snugly and securely onto fence
• Accommodates corners and uneven ground
• 18 blocks per standard pallet


rotablock with chain security

• Chain for adjustable, secure fitting to fence
• Standard filler cap
• 25 mm Drain plug for controlled drainage
• Dims Length 1000 x Height 400 x Depth 390 mm
• Weight per full block 105 kg max
• Customisable colour / brand

Rotablock Mini

Feature Specification
Material MDPE
Size L 1000 x H 400 x D 390 mm
Weight - empty 8.9 kg
Water capacity - max 92 Litres
Weight – full max 101 kg
Fill level To fill cap
Fill cap size 3 ¾ / 75 mm
Drain plug 25 mm
Max angle 45 deg approx
Attachment method Chain to fence mesh
No per pallet 1 x 1 metre = 18

Rotablock Original

Feature Specification
Size L 605 x H 985 x D 720 mm
Weight - empty 22 kg
Water capacity - max 313 Litres
Weight – full max 333 kg
Fill level To fill cap
Fill cap size 3 ¾ / 75 mm
Drain plug 25 mm
Max angle N/A
Attachment method BRACKET
No per pallet 1 x 1 metre = 8

Download the Rotablock Brochure
Download the Rotablock Specifications

Contact Us
Please contact us if you have any questions such as price or lead times. Merlin Industrial Products Ltd Unit A43 Kingsley Close, Lee Mill Industrial Estate Ivybridge Devon PL21 9LL United Kingdom Call: 01752 690622 Fax: 01752 313333
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