District heating · Pre-insulated pipework · UK-wide
Built for the network ahead.
JGD are industry-leading experts in the design, management and installation of pre-insulated heating and cooling networks. Those networks keep critical infrastructure, communities and businesses moving towards a lower-carbon future.
Built on experience
Heat-network delivery without the guesswork.
We bring design understanding, installation expertise and commercial clarity together in one accountable team.
From early buildability input to welding, jointing, surveillance, testing and repair, JGD works closely with clients, consultants and civils partners to solve constraints before they become programme risks.
Our people have delivered some of the UK’s most demanding district heating and cooling installations, from healthcare and residential developments to data centres and major energy infrastructure.
Meet JGD District HeatingWhat we deliver
Specialist capability at every stage of the network.
Practical support from pre-construction planning through installation, commissioning, repair and long-term performance.
District heating & cooling
Plan and install efficient networks around real-world programme and site constraints.
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Pre-insulated pipe networks
System selection, stress strategy, welding, jointing, testing and quality records.
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Network repairs
Fault investigation, planned shutdowns and durable repairs that restore performance.
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Civil engineering works
Coordinated excavation, trenching, access, reinstatement and project management.
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Featured project
North London Heat & Power
A complex district heating network integrated into major energy-from-waste infrastructure at Edmonton EcoPark.
JGD coordinated closely with civil and structural teams to keep large-diameter LOGSTOR pipework moving safely through a high-demand programme.
Read the case studyPipe systems
Specify for performance. Install for life.
We help teams select and deliver the right pre-insulated system for temperature, pressure, routing, space and whole-life performance.
View every pipe systemLTHW pre-insulated pipes
Efficient bonded systems for modern low-temperature heat networks.
HTHW & steam systems
Robust solutions for higher-temperature and industrial duties.
Flexible pipe systems
Fast, adaptable installation for branches, connections and constrained routes.
TwinPipe systems
Flow and return combined within one casing to reduce trench width and heat loss.
ISOPLUS pipe systems
Installation and jointing for rigid and flexible pre-insulated district heating and cooling pipework.
Network surveillance
Embedded monitoring that helps locate moisture ingress and faults early.
How we work
One clear route from challenge to commissioned network.
Understand
Review the brief, route, operating conditions, programme, interfaces and risk.
Plan
Build a project-specific methodology around logistics, sequencing and quality controls.
Deliver
Coordinate installation, welding, joints, surveillance and testing with the wider team.
Prove
Complete checks, records and handover so the client knows exactly what was installed.
Common questions
Heat-network expertise, made clear.
Bring us in early for buildability input, or when a live network needs a specialist response.
What does a district heating contractor do?
A specialist contractor plans, installs, tests and maintains the network that moves heat from an energy centre to connected buildings. JGD’s scope can include pre-construction input, steel and HDPE welding, casing joints, leak-detection systems, testing, quality records and repair.
Does JGD work across the UK?
Yes. Our teams support heat-network projects across the UK, including healthcare, residential, education, data-centre, industrial and public-sector schemes.
Can you repair an existing pre-insulated pipe network?
Yes. We can support investigation, excavation coordination, shutdown planning, pipe and joint repair, surveillance checks, testing and reinstatement.
Which pre-insulated pipe systems can you install?
We work with bonded steel, flexible polymer, TwinPipe, copper, high-temperature, fusion-welded joint and surveillance systems, including LOGSTOR and ISOPLUS pipe systems.
When should JGD join a project?
Early involvement creates the most value because routing, expansion strategy, access, deliveries and interfaces can be addressed before work reaches site. We can also join later for specialist installation, testing or repair packages.
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