LIN-HS2 · Lining & containment
HS2 pond lining in 1mm HDPE
A lined pond on the HS2 route near Coventry: three rolls of 1mm Atarfil HDPE welded over geotextile, detailed around two concrete headwalls and tested seam by seam.
- Location
- Coventry
- Region
- West Midlands
- Sector
- Infrastructure
- Completed
- 2026
Lining & containment · Coventry
HS2
- Ref
- LIN-HS2
- Region
- West Midlands
- Sector
- Infrastructure
- Year
- 2026
What we did
Formation covered in NW100 geotextile (supplied by the client), then three rolls of 1mm Atarfil HDPE deployed across the pond and up the banks, welded panel to panel and sealed to the two headwalls.
The tricky bits
Headwalls are where pond liners leak. Each one was detailed separately so the liner seals to the concrete with no gaps, and every weld was pressure-tested, numbered and marked as passed on the membrane.
What we delivered
A tested, documented pond lining on one of the country's biggest infrastructure projects.
The liner
HDPE is the liner we recommend for large ponds and reservoirs, and for the toughest UV and chemical exposure. Three rolls of Atarfil were deployed over the NW100 underlay, which keeps the formation from working against the liner from below.
The panels were placed and seam-welded on site. The two headwalls were treated as separate details.
Sign-off
Seams and details were inspected and the weld test records completed before we left site. The lining was signed off in August 2026, handed over with the weld test records and documentation.
- Application
- Pond lining
- Membrane
- 1mm Atarfil HDPE, 3 rolls
- Geotextile
- NW100
- Details
- 2 headwalls
On site · Coventry
On site
Plot lining at a waste recycling facility
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