24/7 Service
Sublime is available to assist you at all times, 24 hours a day and 365 days a year.
Heating, Insulation & Renewable Energy Services
For Homeowners & Tenants
- First Time Central Heating
- Boiler Installation & Replacement
- Back Boiler Replacement
- Air Source Heat Pump Installation
- External & Internal Wall Insulation
- Solar PV & Loft Insulation
100K+
Households Supported
About Us
Smart Energy Solutions for a Greener Tomorrow
Sublime helps UK households access government-backed energy upgrades that make homes warmer, more efficient, and more affordable to run.
From eligibility checks and property surveys to heating, insulation, and renewable improvements, our team keeps the process simple, clear, and focused on long-term savings.
- First Time Central Heating
- Boiler Installation
- Air Source Heat Pumps
- External Wall Insulation
- Internal Wall Insulation
- Cavity Wall Insulation
UK Government Schemes
Warm Homes & BUS guidance
Qualified Installers
Heating and insulation
Energy Saving Advice
Free guidance
Nationwide Coverage
England, Wales, Scotland
Why Choose Sublime?
Expert & Qualified Team
Our experienced professionals deliver high-quality heating and insulation work that improves energy efficiency, comfort, and performance.
Save Time & Money
Save time and money by checking current funding routes and suitable upgrades before committing to heating, insulation, or renewable energy work.
Sublime Energy Improvement Services
Retrofit Assessment
A Retrofit Assessment is the first step toward improving your home's energy efficiency. Sublime reviews the full property and recommends the right measures to reduce bills and improve comfort.
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Retrofit Coordination
Our Retrofit Coordinators manage the project from start to finish, keeping surveys, planning, contractors, documentation, and sign-off aligned with PAS 2035 requirements.
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Retrofit Installation
From insulation and heating upgrades to managed improvement works, our installation support helps each project meet a high standard with quality checks throughout.
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Energy Performance Certificates (EPC)
An up-to-date EPC is needed when selling, renting, or improving a home. Our assessors carry out the survey and issue clear certificates to support compliance and planning.
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Airtightness Testing
Airtightness Testing shows where heat is escaping through gaps and draughts. The results help prioritise the most effective improvements for the property.
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Factor Temperature Calculations
We assess heat loss at key junctions such as walls, floors, and openings, helping improve energy calculations and support current building regulation compliance.
Find Out MoreDo I Qualify for Current Energy Improvement Support?
Sublime can check your property against current routes such as the Warm Homes Programme and Boiler Upgrade Scheme, then explain suitable heating, insulation, solar, and retrofit options.
You may be eligible if your property currently uses one of the following heating setups, or if someone living in the property receives qualifying benefits:
- No heating system currently in place
- Solid fossil fuel room heaters
- Bottled LPG room heating
- Wood or biomass room heating
- Oil room heaters
- Gas fire with back boiler
- Electric underfloor or ceiling heating
- Qualifying household benefits may apply
FAQ's
Yes, it may still be worth checking. Eligibility depends on your household, property, benefits, and the funding route available at the time, so our team can review your details before you decide what to do next.
You may be eligible through certain schemes, but permission and property criteria can apply. Sublime can help check the route for homeowners, private tenants, and social housing tenants.
Eligible homes may receive energy-saving measures such as heating upgrades, insulation, controls, and advice designed to reduce wasted energy, improve comfort, and cut household bills.
We help households understand current support routes for boiler upgrades, first time central heating, air source heat pumps, external wall insulation, internal wall insulation, loft insulation, solar PV, and related energy upgrades.
We collect your basic property and household details, review the current criteria, and explain the next steps clearly. If your home looks suitable, we can arrange the survey and guide you through the process.
What Homeowners Have To Say...
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Sarah Wilson ★★★★★
Excellent company. Sublime helped us understand the grant process and arrange heating improvements without confusion. The team was friendly, professional, and clear from start to finish.
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James Harris ★★★★★
I was unsure about inviting people into my home, but the Sublime team put me at ease. They explained the insulation options clearly and completed the work to a high standard.
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Amelia Clarke ★★★★★
Thanks to the team for helping with our old heating system. The work was completed quicker than expected, communication was excellent, and the house feels much warmer.
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Louis Parker ★★★★★
Great job. I liked how the team communicated and gave useful advice before the installation. The process felt organised, practical, and easy to follow.
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Olivia Morris ★★★★★
Professionalism at its best. The team fitted our insulation neatly, kept disruption low, and made sure everything was explained before they left.