Build Recruitment
22/09/2026
Seasonal
LAGGERS / THERMAL INSULATION OPERATIVES Location: London & Greater London Job Type: Long-term / Ongoing Projects Sector: Commercial Construction / Building Services Pay: Competitive rates dependent on experience and project We are currently looking for experienced Laggers / Thermal Insulation Operatives for a number of projects across London. We are looking for skilled operatives with a genuine background in thermal insulation and lagging, working across commercial construction projects including schools, hospitals, offices, hotels, residential developments, plant rooms and major M&E installations. This is an excellent opportunity for experienced Laggers looking for consistent work on established London projects. THE ROLE As a Lagger / Thermal Insulation Operative, you will be responsible for the installation of thermal and acoustic insulation systems across a range of mechanical services. Typical works will include: Installing thermal insulation to pipework, ductwork and associated mechanical services Lagging hot and cold water pipework Insulating heating and chilled-water pipework Installing insulation to HVAC and ventilation ductwork Working within plant rooms and M&E service areas Installing insulation to valves, flanges, bends, tanks and associated equipment Measuring, cutting and fitting insulation materials accurately Installing vapour barriers and protective finishes where required Installing pre-formed or fabricated metal/PVC cladding Working with materials such as mineral wool, Rockwool, glass fibre, cellular glass, PIR/PUR and elastomeric insulation Jointing, sealing and weatherproofing insulation systems Working from drawings, specifications and manufacturer instructions Measuring quantities and minimising material wastage Using hand tools and power tools safely Preparing surfaces prior to insulation installation Removing and replacing existing insulation where required Maintaining a clean and safe working area Working safely at height using appropriate access equipment Following RAMS, permits and site-specific safety procedures Liaising with other trades and site management to coordinate works Reporting any defects, issues or changes to the Site Manager / Supervisor Ensuring all works are completed to the required quality and specification EXPERIENCE & QUALIFICATIONS Essential: Some sites will need Enhanced DBS. Proven experience working as a Lagger / Thermal Insulation Operative Strong practical experience installing insulation to pipework and/or ductwork Good understanding of different insulation materials and their applications Ability to read and work from drawings, specifications and technical information Competent with relevant hand tools and power tools Good understanding of construction-site health & safety Able to work independently and as part of a wider M&E team Reliable, punctual and professional Right to work in the UK Qualifications / cards: CSCS card appropriate to the role NVQ / Level 2 qualification in Thermal Insulation / Commercial Thermal Insulation desirable Relevant apprenticeship or recognised thermal insulation qualification desirable IPAF / PASMA desirable depending on project Asbestos Awareness desirable, particularly for refurbishment projects Additional site-specific qualifications may be required depending on the project Relevant qualifications and proven experience will be considered where candidates do not hold every listed certification. SKILLS WE ARE LOOKING FOR The ideal candidate will have experience with: Pipework lagging Ductwork insulation HVAC insulation Chilled-water systems Heating systems Plant rooms Acoustic insulation Thermal insulation Vapour barriers Metal/PVC cladding Valves, flanges, bends and fittings Insulation removal and replacement Working from drawings and specifications Commercial M&E environments HEALTH & SAFETY You must have a strong understanding of working safely within an active construction environment, including: PPE requirements COSHH Manual handling Working at height RAMS and safe systems of work Permit-to-work procedures where applicable Safe use of tools and access equipment Correct handling and disposal of insulation materials Asbestos awareness and appropriate procedures when working in refurbishment environments PROJECT ENVIRONMENTS We have opportunities across a range of London projects, including: Schools Hospitals Offices Hotels Residential Commercial Developments Plant Rooms Data Centres M&E Projects Refurbishments WHAT WE OFFER Long-term and ongoing work Projects across London and Greater London Competitive rates Weekly pay Opportunities for overtime Potential for continued work on future projects Support from an experienced recruitment team Immediate starts available on selected projects If you are an experienced Lagger / Thermal Insulation Operative looking for work in London, apply today with your CV and we will be in touch.
