Specialist Contractors Since 1979

John Nicholson Ltd, has operated in the specialist sectors of the construction industry, particularly waterproofing, roofing, and specialised flat roofing, installing accredited long-term systems.

2000+

PROJECTS COMPLETED

UK

PROJECTS NATIONWIDE

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“I would have no hesitation in recommending your company and indeed already have done so.”
“Just popped to site and would like to say what a great job your guys are doing Wow. Big thanks for all their hard work.”
“I would like to express my appreciation on the way in which your team carried out the work on our cottage, they broke the stereotype for builders. They worked efficiently and courteously and I would be quite willing to recommend your company to my friends.”
“It is really good to see a firm that takes its responsibility seriously and puts their customers first.”
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About Us

With over 40 years of industry experience, John Nicholson Construction is a trusted specialist in waterproofing, roofing, and structural protection. We combine proven expertise with a strong commitment to quality, ensuring every project is completed to the highest standard. Our team takes pride in delivering reliable, long-lasting solutions that protect and enhance the buildings our clients depend on.

Learn more
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Specialist

Delivering advanced waterproofing, roofing and structural solutions backed by over four decades of mastery.

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Our Values

We value honesty, reliability, and clear communication. Our commitment to quality and safety guides each project.

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Our Mission

Committed to protecting and enhancing structures through high-performance waterproofing and roofing systems.

Being builders as well gives us a greater understanding of detailing at the waterproofing interface in addition to the ability to carry out related building tasks.

Our services

Rooftop with multiple ventilation pipes and a skylight, overlooking a rural landscape with hills and trees under a blue sky with clouds.

Flat Roofs

A steep residential roof with light-colored asphalt shingles under construction, showing some partially installed shingles on the left side and a chimney at the top

Traditional Roofs

The corner of a brick house with stone accents, a window with white framing, a decorative water fountain, a small plant, and yellow flowers in a garden bed under a blue sky.

General Building & Maintenance

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Specialist Waterproofing

Reliable Service

CSCS REGISTERED WORKFORCE

Having a fully qualified and CSCS registered workforce, ISO 9001 Quality Assurance (since 1993), Safe Contractor and Trustmark accreditation, being a certified member of the Federation of Master Builders (FMB), and being on the approved list of many manufacturers, Local Authorities and prestigious organisations demonstrate reliability, longevity and a professional level of competence in the works that we undertake.

Surveys & Tests

GENERAL MAINTENANCE

JNL also carries out contracted general and reactive maintenance for national and local organisations, Local Authority Grants (for disabled facilities, etc), insurance work, and small general buildings works. We also provide a survey, test, and diagnostic service.

WHY CHOOSE US

  • Established and trusted specialist contractors since 1979 with decades of experience in construction, roofing and waterproofing.

  • In-depth specialised knowledge and extensive experience across waterproofing, roofing and associated building services, delivering reliable, high-quality solutions for even the most complex projects.

  • Professionally qualified team with a CSCS registered workforce, delivering consistently high standards of workmanship in line with industry regulations.

Line drawing of a traditional steeply sloped wooden house with a triangular roof, outward extending eaves, and supporting beams underneath.

Portfolio

Before After

Projects

Cowes Enterprise College

Before After

Totland Pier

Before After

Timber Refurbishment

View More Projects

Get in Touch

Whether you have a question, an idea, or just want to say hello, feel free to reach out—we’re here to help.