Since 1998


Welcome to Sentinel Contracting. London’s favourite specialist decorating and fire protection sub-contractor.

We have a proud heritage that stretches back over twenty years, and a steadfast track record delivering works across a wide range of large-scale commercial building projects where there are often tight commercial, operational, and contractual constraints.

Today, our reputation for high-quality work is firmly established and we regularly undertake complex decorating & firestopping commissions from leading construction companies.

We deliver certainty with our rigorous procedures and work collaboratively with clients across all industry sectors to develop solutions that deliver value. By placing emphasis on safety, quality, innovation and sustainability we are able to constantly adapt decorating and fire protection solutions to our clients evolving requirements.


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Fire Stopping

Sentinel is a built-in fire protection contractor with extensive expertise providing technical solutions in the design and installation of complex passive fire protection systems.  

  • Full Builder’s Work in Connection (BWIC) packages
  • Intumescent Painting
  • Spray Applied Systems
  • Board Fire Protection
  • Fire Stopping
  • Fire Barriers and Curtains
  • Air Sealing

Headed up since 2012 by industry leading practitioner Arthur Nelmes, the division has been instrumental in improving the standard of fire protection design & installation across the UK, Europe, and the Middle East, benefiting construction industry partners and the clients they serve. 

‘The building is fire safe from cradle to grave’.  At Sentinel this means we provide an accurate, cost effective method for recording design, supply and installation works.  This includes Unique Identification Numbers, making pinpointing fire stopping seals through the fire compartment walls and floors of the building straightforward and easily traced by the client, landlord or building manager.

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Commercial Decorating

Sentinel has successfully delivered multimillion-pound commercial decorating projects for many of the UK’s leading construction companies and achieved preferred status with Tier 1 main contractors.  

  • Painting
  • Decorating
  • Specialist coatings
  • Mastic
  • Waterproof Liquid Roofing System (SIG)

Our extensive and diverse portfolio of projects – including K1 Knightsbridge, Kingston University Townhouse, 60 London Wall, and Papworth Hospital – endorses our reputation for managing and delivering complex and valuable schemes on time and on budget.

Today, we are recognised by clients and main contractors as the decorating contractor of choice for progressive projects with complex environmental challenges.  This is a result of our work to mitigate the impact of decorating on the environment, as well as solutions to meet WELL building standards, which take a holistic approach to health in the built environment. 

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The Sentinel team are pleased to have recently completed decorating works at the £150m K1 Knightsbridge development in London’s most prestigious postcode.  

Our firestopping skills will be put to work on this great project at 20 Ropemaker Street which consists of 419,093 sq ft of office space and 11,785 sq ft of ground level retail space.

We put safety, quality, innovation and sustainability first



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Sentinel Contracting plc

Unit 2a Guildprime Business Centre,

Southend Road Billericay,

Essex CM11 2PZ