Delta Membrane Systems Limited is a manufacturer and provider of specialist structural waterproofing solutions, covering Type A, Type B, and Type C waterproofing, combination waterproofing, damp proofing, basement drainage, flood resilience and ground gas protection.

Delta Membrane Systems can be used on domestic and commercial properties from small scale basement conversions to major public works, such as the London Underground. The channel tunnel for example uses over 70,000m² of DELTA^®-MS.

Technical support

Delta's in-house team of technical consultants support our clients in provides reliable, and expert advice, identifying, and mitigating risk and establishing opportunities for added value.

Registered installer network

Delta Registered Installer offers a fully guaranteed installation service nationwide.

Delta membranes

Made of a special type of polyethylene, DELTA^® membranes form highly efficient seepage and drainage layers. They are compression-resistant, maintaining their outstanding hydraulic properties even under heavy and permanent loads.

The fused-on geotextile layer of the multi-layered DELTA^® dimpled sheets filters soil particles out of the seepage water, thus preventing air gaps from becoming clogged up. With a welded-on plaster mesh, dimpled sheets may be used as backing for shotcrete and mortar.

DELTA^® membranes are rot-proof, resisting saline solutions, inorganic acids, alkalines, and polar liquids. They are proof against attack or modification by any of the minerals, humic acids, and bacterial catabolic products that naturally occur in the soil, as well as by bacteria, fungi, and micro-organisms.

The response of all sheet types to soil or underground water is completely neutral, and they do not leach any harmful or ecologically doubtful substances.

Delta Membrane Systems

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Delta Membrane Systems - high level alarms

Products

Delta HLA high water level alarms for basement sumps and pumps

Delta Smart High Level Alarms

Delta HLA Plus Intelligent - Groundwater - high water level alarm

Delta HLA - Groundwater (high water level alarm) (DMS190-1)

Delta HLA 800 Series (high water level alarm) (DMS191-1)

Delta HLA - Groundwater (high water level alarm) (DMS 190)

News

Revolutionising pumping stations with innovative HLA Plus

Delta - new HLA range available now

Delta Shortlisted in Five Categories at the London Construction Awards

Delta Shortlisted Twice in the PCA Best Practice Awards 2026

Double award win celebrates excellence in UK structural waterproofing

Delta shortlisted for two Ground Engineering awards in 2025

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