Waterproofing for Commercial Sites That Can’t Afford to Fail
Professional delivery that meets your spec every time
Applications Across the Commercial Sector
When you’re delivering a commercial build, you can’t afford waterproofing problems. APP works with main contractors, developers, architects and engineers to deliver watertight systems that meet spec, meet programme and meet warranty.
We take on the design risk, we install it ourselves, and we back it with insurance. No delays. No finger-pointing. No corners cut.
Whether it’s a new-build development or an existing commercial structure, APP has the expertise to deliver compliant waterproofing to any site.
We’re equipped to take on:
- Basements and underground structures
- Car parks and access areas
- Plant rooms, utility zones, lift pits
- Sensitive environments like server rooms and data centres
- Mixed-use, retail, industrial or public buildings
Our role is to provide protection — not just from water, but from risk, disruption and uncertainty.
Fill in the form below and one of our team will get back to you.
Alternatively give our friendly team a call today:
The Systems We Use (and Why It Matters)
In commercial developments, a single waterproofing method is rarely sufficient. Warranty providers such as NHBC, Premier Guarantee and LABC typically require a combined or dual-system strategy to satisfy technical standards including NHBC Chapter 5.4. At APP, we design integrated solutions that combine appropriate BS 8102 system types to meet these requirements, ensure long-term performance, and mitigate the risk of non-compliance or future remedial liability.
External Systems
Type A
External membranes or coatings applied to prevent water entering the structure. Type A creates a physical barrier, typically used on retaining walls and floor slabs. Best suited where full access to the outer face is available during the build.
Integral Protection
Type B
Relies on the structure itself being watertight, using water-resisting concrete and detailed joint design. Most effective when included early in the design and commonly used in concrete-frame commercial builds.
Drained Protection
Type C
Manages rather than blocks water. Cavity drain membranes are installed internally to direct water to a sump and pump or gravity outlet. Ideal for basements, plant rooms or areas needing dry internal conditions.
Who we work with
Why leading contractors choose APP Protect
Design Responsibility
We assume full design responsibility and carry appropriate professional indemnity insurance
Installation
All installations are carried out by our directly employed teams, not subcontracted
Project Timelines
We align with project timelines and coordinate installation around site sequencing
Full Insurance
Our work is protected by independent, insurance-backed guarantees via GPI
Accredited
We are accredited by the PCA, CHAS and Trustmark, and undergo regular compliance audits
BS 8102:2022 Compliant
Structural Waterproofing Contractor of the Year – 2019, 2022, 2024
CSSW-Certified Design Team
PI-Insured Designs No Split Liability
How We Work – Start To Finish
APP’s delivery model is structured to integrate with commercial project workflows, ensuring technical compliance, programme alignment and full
accountability throughout.
Initial Consultation and Review
We engage at the earliest opportunity to assess site conditions, review technical drawings and understand project objectives.
Design and Specification
Our team produces a detailed waterproofing specification in line with BS 8102:2022 and warranty provider requirements. All design responsibility is retained in-house.
Programme Coordination
We coordinate closely with the main contractor and project team to ensure that waterproofing works are sequenced appropriately within the construction programme.
Installation
All systems are installed by APP’s directly employed and trained teams. This guarantees continuity, quality control and eliminates ambiguity around liability.
Completion and Handover
On completion, we issue system certification, provide maintenance guidance, and supply relevant documentation for warranties and compliance.
What we do
Built for the Commercial Sector
APP has the knowledge, systems and structure to deliver waterproofing on any commercial site. From initial design to final sign-off, we support: main contractors, architects and engineers, developers and clients and public sector and FM teams.
Whether you’re preparing a tender, reviewing a spec or about to break ground we’re ready to step in and take the waterproofing off your worry list.
Main Contractors – Seamless delivery with no hold-ups
Architects & Engineers – Detail and compliance support
Developers & Clients – Warranty-ready systems that last
Public Sector & FM Teams – Full scope, clear docs, no surprises
Commercial Waterproofing FAQs
Yes. We design all systems in-house and carry full professional indemnity cover.
We’re based in Cambridgeshire and cover East Anglia, but regularly take on large-scale commercial sites across the UK.
Absolutely. We design in line with NHBC, Premier Guarantee and LABC standards.
No. All installation is handled by our directly employed teams.