MacLennan-LSE
MacLennan Waterproofing is a UK specialist contractor that designs, supplies, and installs BS 8102:2022-compliant basement waterproofing, gas mitigation, and building preservation systems for tier-1 commercial contractors, architects, homeowners, and heritage organizations across the UK.
- Company typePrivate
- Founded2000
- HeadquartersAmesbury, United Kingdom
- Headcount11–50
- GTM typeB2B
- OfferingServices
What MacLennan-LSE does
MacLennan Waterproofing (legal entity LSE Building Preservation Ltd) is a UK specialist waterproofing contractor that designs, supplies, and installs structural basement and below-ground waterproofing systems compliant with British Standard BS 8102:2022. Founded in 2000 and headquartered in Amesbury, the company serves commercial building developers and contractors, architects and structural engineers, high-end residential homeowners, housing associations and warranty providers, and heritage and conservation organizations across the United Kingdom. The firm delivers the three principal waterproofing system types defined in BS 8102 — Type A barrier, Type B integral waterproof concrete, and Type C cavity drain membranes — alongside proprietary technologies including CrystalCoat crystalline concrete waterproofing, Polyprufe polyurea spray coatings, Insudrain drainage-insulation membranes, the PAC 500 combined waterproofing and gas-mitigation system, and Aqualock service entry protection.
The business operates a direct enterprise field-sales model, engaging architects, structural engineers, and main contractors early in the design process (pre-RIBA Stage 3/4) to influence specifications. CSSW- and WDS-qualified surveyors deliver design and consultancy services, with full design liability covered by £10m Professional Indemnity Insurance and comprehensive guarantees covering design, materials, and installation — not limited to material cost — supported by a 100% guarantee uphold rate tracked since 2011. Revenue streams include waterproofing installation, design-only consultancy, proprietary product supply, annual sump-and-pump servicing subscriptions, and ancillary damp proofing and timber treatments. Distribution is exclusively direct with no resellers, and the company carries out more than 200 basement projects per year, spanning small domestic conversions to multi-million-pound commercial packages for tier-1 contractors.
MacLennan's competitive position rests on regulatory authorship (founder Ian MacLennan co-authored BS 8102:2022), accumulated accreditations (NHBC, Achilles, CHAS, PCA, Safecontractor, ISO 9001, Radon Council), deep technical credentials, and a single-source responsibility model that eliminates split liability between designer and installer. The firm holds long-tenured relationships with architectural practices, tier-1 contractors, warranty providers, and heritage bodies including English Heritage, indicating a sticky but broadly distributed customer base across both new-build and remedial waterproofing segments.
MacLennan-LSE firmographics
Firmographics- Name
- MacLennan-LSE
- Legal name
- LSE building preservation ltd
- Website
- https://maclennanwaterproofing.co.uk
- Company type
- Private
- Founded year
- 2000
- Operating status
- Operating
- Headcount range
- 11–50 employees
- Short description
- MacLennan Waterproofing is a UK specialist contractor that designs, supplies, and installs BS 8102:2022-compliant basement waterproofing, gas mitigation, and building preservation systems for tier-1 commercial contractors, architects, homeowners, and heritage organizations across the UK.
- Ownership category
- akta.pro rank
MacLennan-LSE industry classification
Industry- Product category
- Structural Waterproofing Services
- akta.pro primary industry
- Basement Waterproofing & Moisture Control (HSAPACAA)
- akta.pro secondary industry
- Waterproof Coatings & Leak Sealing (Basements, Foundations, Roof Coatings) (HSAGADAI)
Keywords
Where MacLennan-LSE is headquartered
LocationHeadquarters
- HQ city
- Amesbury
- HQ country
- United Kingdom
- HQ region
- Europe
Offices1 record
Markets served
MacLennan-LSE business model
Business model- GTM type
- B2B
- Offering type
- Services
- Cost components
- Personnel, Supply Chain, Operations, Marketing or Sales, Others
Revenue model
- Waterproofing Installation: Full design, supply, and installation of waterproofing systems including cavity drain membranes, external tanking, and polyurea coatings. The company takes full design liability and covers installation under its comprehensive guarantee and £10m PI insurance.
- Design and Consultancy Services: Design-only and consultancy services for waterproofing design, primarily targeted at architects and engineers before RIBA Stage 3/4. CSSW and WDS qualified surveyors provide technical design, risk assessments, and specification support.
- Product Supply: Supply of proprietary waterproofing products and systems including CrystalCoat, Polyprufe, cavity drain membranes, and associated components.
- Servicing and Maintenance: Annual inspection and servicing of sump pumps and waterproofing systems, including camera inspections of channels. Required for maintaining guarantees.
- Damp Proofing and Timber Treatments: Damp proofing, timber treatment, dry rot treatment, and associated building preservation services for historic and modern buildings, often as bolt-ons to waterproofing projects.
Pricing tiers
| Model | Billing | Price |
|---|---|---|
| Other | Pay-as-you-go | Survey and Report |
Go-to-market motion1 record
Distribution channels3 records
Marketing channels6 records
MacLennan-LSE product offering
Product offeringCore offering
MacLennan Waterproofing is a UK specialist contractor providing design, supply, and installation of structural waterproofing systems for basements, decks, and below-ground structures, alongside radon gas protection. The firm works across commercial new-build, residential, and heritage/listed-building projects, operating as a design-and-install contractor with technical specification support for architects and engineers.
Product overview
MacLennan is a specialist waterproofing contractor offering a comprehensive suite of waterproofing, gas mitigation, and building preservation services. The core offering comprises Type A (barrier), Type B (integral waterproof concrete), and Type C (cavity drain) waterproofing systems compliant with BS 8102:2022. Key products include the Cavity Drain System with sump/pump management, Polyprufe polyurea spray coatings, CrystalCoat concrete waterproofing, Gas Membrane Systems for radon/methane/CO2 protection, and Bund Linings for chemical containment. Services span basement waterproofing, deck waterproofing, historic building preservation, structural repairs, damp proofing, and condensation treatment. The company provides design-only consultancy alongside full supply-and-install services, with CSSW and WDS certified surveyors. The product portfolio also includes Insudrain drainage/insulation membranes, Aqualock service entry systems, lime plaster and ventilated lathe systems for historic properties, and resin injection repairs.
Differentiator
Problem solved
Functional benefit
Products and services
- Basement Waterproofing (BS 8102:2022) Design, supply, and installation of Type A (barrier), Type B (structurally integral), and Type C (drained cavity) basement waterproofing systems for commercial, residential, and heritage projects, delivered to BS 8102:2022.
- Deck and Podium Waterproofing Specialist waterproofing of podium decks, balconies, and elevated external decks for commercial and residential developments, including detailing at upstands, thresholds, and drainage connections.
- Radon Gas Protection and Mitigation Design and installation of radon gas protection membranes and mitigation systems for new-build and existing structures, including residential, commercial, and heritage buildings in affected areas.
- Heritage and Listed-Building Waterproofing Specialist waterproofing and damp-proofing for heritage, ecclesiastical, and listed buildings using restrained-structure methodology that respects traditional materials and conservation requirements.
- Waterproofing Design and Specification Support Technical design, specification, and detailing support for architects and structural engineers on basement, deck, and radon waterproofing, including BS 8102:2022-aligned documentation and submittals.
Quantifiable outcome
- 0% split responsibility — 100% of guarantees upheld since 2011
- +2 more outcomes
Companies that use MacLennan-LSE
Customer profileNamed customers12 records
Segments5 records
Ideal customer profiles4 records
MacLennan-LSE technology and API
TechnologyTechnology focussed No
API detail
- Has API
- No
- API docs
- API detail
Core technology
AI maturity
App detail
Feature8 records
MacLennan-LSE partnerships and signals
Strategic signalPartnerships
Five partnerships are on record, tiered core, major and minor.
- NHBC (National House-Building Council)coreNHBC is a major UK warranty and insurance provider for new-build homes. MacLennan is an NHBC certified waterproofing contractor, allowing them to work on NHBC registered projects. NHBC and other warranty providers (LABC, BLP, Premier) require compliance with BS 8102:2022 and mandate CSSW/WDS qualified waterproofing professionals on projects, which MacLennan satisfies.
- English HeritagecoreMacLennan works closely with English Heritage to install waterproofing and damp proofing systems for historic buildings. Systems are designed to be either completely demountable or to maintain aesthetics close to the original property, meeting conservation officer requirements for listed buildings.
- LABC, BLP, and Premier Warranty ProviderscoreMajor UK structural warranty and building control providers that mandate BS 8102 compliance and dual-system waterproofing for habitable basement structures. MacLennan's CSSW/WDS qualifications and comprehensive guarantees meet their requirements.
- Wilmott DixonmajorOne of the UK's largest construction and interior fit-out companies. MacLennan was contracted by Wilmott Dixon to design, supply, and install the waterproofing system for the LCCM Music Box project in London.
- Bob Cather BSc (Hons) CEng FIMMMminorPast President of The Concrete Society and independent materials consultant who authored a detailed technical paper on watertight concrete additives published on MacLennan's website. Represents thought leadership collaboration in the waterproofing and concrete engineering space.
Scale indicators5 records
Recent moves7 records
Expansion highlights5 records
MacLennan-LSE competitors and assessment
Company assessmentBroad incumbents
- BASF Master Builders Solutions: Global construction chemicals brand offering waterproofing, concrete admixtures and repair systems. Comparable to the technical/chemical waterproofing dimension of MacLennan's offering but as part of a much wider portfolio serving infrastructure and commercial construction broadly.
- Sika: Global construction chemicals and waterproofing giant offering membranes, sealants, concrete admixtures and structural waterproofing systems. Comparable to MacLennan's CrystalCoat-type concrete waterproofing and broader waterproofing portfolio, but operating at much larger scale across many construction segments.
- Fosroc: International construction chemicals supplier with waterproofing, concrete repair and sealing products used in basements, decks and infrastructure. Comparable to MacLennan's chemical waterproofing and sealing scope but operating globally across many construction sub-segments.
Direct peers
- Property Repair Systems: UK specialist contractor in damp proofing, timber treatment, condensation and basement waterproofing. Comparable to MacLennan in the heritage/domestic remediation niche and in bundling waterproofing with broader building preservation services.
- Oldroyd (Isola): Membrane-based waterproofing brand (now part of Isola) historically strong in cavity drain and structural waterproofing membranes in the UK and Nordics. Direct comparable in membrane-system technology used in basement waterproofing.
- Wykamol: UK manufacturer and supplier of damp proofing and waterproofing products, including cavity drain membranes and structural waterproofing systems. Direct peer in product range and customer base across contractors, architects and homeowners.
- Safeguard Europe: UK specialist in damp proofing, waterproofing and structural repair products and services. Comparable to MacLennan in the building preservation / damp-proofing overlap and in serving both residential and commercial heritage projects.
- Newton Waterproofing Systems: UK specialist waterproofing contractor and product supplier offering Type A, B and C systems, design services and warranties. Closely comparable to MacLennan in target customers (architects, contractors, homeowners), BS 8102-compliant offerings and single-source supply-install model.
- Delta Membrane Systems: UK manufacturer and supplier of waterproofing and gas-proof membranes, including Type C cavity drain systems used in basements. Overlaps directly with MacLennan's core membrane-and-cavity-drain business and serves the same architect/contractor specification channel.
- Triton Systems: UK waterproofing and damp-proofing specialist offering tanking membranes, cavity drain systems and structural repair products. Comparable to MacLennan across Type A/B/C waterproofing categories and warranty-provider-driven specifications.
Market position
Strengths4 records
Weaknesses4 records
Competitive moat5 records
Key risks5 records
Key highlights7 records
Customer concentration
MacLennan-LSE social profiles
Digital presenceMacLennan-LSE compliance and trust
Trust signalCompliance13 records
MacLennan-LSE financial estimates
Financial estimateRevenue estimate
Valuation estimate
MacLennan-LSE leadership team
Management profileNumber of profiles
Profiles2 records
MacLennan-LSE funding detail
Funding detailFunding overview
Funding rounds
Investors
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
MacLennan-LSE M&A and investment
M&A and investmentM&A
Investments
M&A and investment is available on the Subscription and Enterprise plan.Contact sales →
Frequently asked questions about MacLennan-LSE
What does MacLennan-LSE do?
MacLennan Waterproofing is a UK specialist contractor providing design, supply, and installation of structural waterproofing systems for basements, decks, and below-ground structures, alongside radon gas protection. The firm works across commercial new-build, residential, and heritage/listed-building projects, operating as a design-and-install contractor with technical specification support for architects and engineers.
Is MacLennan-LSE a public or private company?
MacLennan-LSE is a private company. It is classified as family owned and is currently operating.
When was MacLennan-LSE founded?
MacLennan-LSE was founded in 2000. It employs 11 to 50 people.
Where is MacLennan-LSE based?
MacLennan-LSE is headquartered in Amesbury, United Kingdom, in the Europe region.
How does MacLennan-LSE make money?
Five revenue lines are on record. Waterproofing Installation is the primary driver. The others are design and Consultancy Services, product Supply, servicing and Maintenance and damp Proofing and Timber Treatments.
Who are MacLennan-LSE's main competitors?
Broad incumbents on record are BASF Master Builders Solutions, Sika and Fosroc. Direct peers are Property Repair Systems, Oldroyd (Isola), Wykamol, Safeguard Europe, Newton Waterproofing Systems, Delta Membrane Systems and Triton Systems.
Does MacLennan-LSE have an API?
No public API is recorded for MacLennan-LSE.
What industry is MacLennan-LSE in?
MacLennan-LSE's product category is Structural Waterproofing Services. Its primary akta.pro industry code is HSAPACAA, Basement Waterproofing & Moisture Control, with a secondary code of HSAGADAI, Waterproof Coatings & Leak Sealing (Basements, Foundations, Roof Coatings).