Family Values. Commercial Standards.
Commercial Roofing, Waterproofing & Solar Contractor
RMG Construction & Energy Ltd delivers roof refurbishment, new-build roofing, flat and pitched roofing, liquid waterproofing and Solar PV for main contractors, developers, schools and property owners across London and the South East.
Independently accredited. Manufacturer approved.
ISO 9001, 14001 and 45001 certified · Constructionline Gold · CHAS · SafeContractor · Safe2Torch · NFRC and NFRC Competent Person Scheme · SPRA · LRWA · MCS · HIES · TrustMark · FMB · QANW insurance-backed guarantees · Sika, Bauder and Polyroof approved · IKO partner · Tesla Powerwall Certified Installer · Enhanced DBS-checked teams
ISO 9001, 14001 and 45001 certified, Constructionline Gold, CHAS, SafeContractor, NFRC, MCS and TrustMark, with manufacturer approvals from Sika, Bauder, Polyroof, IKO and Tesla. Swipe the logos, or see the full breakdown further down the page.
What RMG Delivers
One accountable contractor for roofing, waterproofing and renewable energy, working to ISO 9001, 14001 and 45001 certified management systems and manufacturer-backed warranties.
Commercial Roofing & Refurbishment
Strip and re-cover, overlay and planned refurbishment of flat and pitched roofs on occupied commercial, education and public-sector buildings. Find out more
New-Build Roofing
Roofing and waterproofing packages for main contractors and developers, from design coordination and specification through to warranty handover. Find out more
Flat Roofing & Waterproofing
Single-ply, liquid-applied, hot melt and built-up felt systems from Sika, Bauder, Polyroof and IKO, installed as a manufacturer-approved contractor. Find out more
Pitched & Heritage Roofing
Natural slate, clay and concrete tiling, traditional leadwork and sympathetic repair of listed and period buildings. Find out more
Solar PV & Battery Storage
MCS-certified commercial and residential Solar PV, battery storage and fully integrated roof-and-solar projects, delivered by RMG Energy. Find out more
Roof Surveys & Planned Maintenance
Drone surveys, condition reports and planned maintenance programmes that give estates and facilities teams a clear picture of their roof assets. Find out more
Sectors We Work In
Experienced in occupied buildings, school-holiday programmes, main-contractor packages and sites with restricted access.
Education
Schools, academies and colleges, including term-time and summer-holiday roofing programmes on occupied sites.
Commercial & Industrial
Offices, hotels, retail, warehouses and industrial units for owners, managing agents and facilities teams.
Main Contractors & Developers
Roofing, waterproofing and solar packages on new-build and refurbishment schemes, delivered to programme.
Heritage & Listed Buildings
Sympathetic roofing, slating and leadwork on period and listed properties.
Public Sector, Housing & Care
Roofing and waterproofing for local authority, housing and care estates, with full compliance and handover documentation.
Agricultural & Energy
Solar PV, battery storage and roofing for farms, estates and landowners, including barns and agricultural buildings.
Selected Projects
Recent roofing, waterproofing and solar projects. Each case study sets out the scope, systems, programme and the challenges we resolved.
EDUCATION
Highbury Grove Academy, London
Approximately 1,800 m² strip and re-roof of the sports hall, completed within a four-week summer programme and resolving long-standing water ingress. Read the case study
EDUCATION
The Marist School, Sunninghill
Full roof renovation across several roof types, completed in the summer holidays to a fixed programme on an occupied school site. Read the case study
COMMERCIAL & HOSPITALITY
Selsdon Hotel, Croydon
Large-scale pitched and flat roof renewal and waterproofing on a working hotel, sequenced to keep the building watertight without temporary roofs. Read the case study
HERITAGE
Lady McAlpine Library
Award-finalist liquid waterproofing restoration of a heritage library roof, protecting the structure while preserving its character. Read the case study
Accredited. Approved. Trusted.
Certified management systems, independently verified competence and manufacturer approvals sit behind every RMG project. The written breakdown below is for clients, consultants and procurement teams who need the detail.
Management Systems
ISO 9001 quality management
ISO 14001 environmental management
ISO 45001 occupational health and safety management
Certified through Citation ISO Certification, covering the whole business
Pre-Qualification & Safety
Constructionline Gold member
CHAS accredited
SafeContractor approved
Safe2Torch registered for torch-applied roofing
Enhanced DBS-checked team members for schools and other sensitive sites
Competence & Consumer Protection
NFRC Trade Member and NFRC Competent Person Scheme
SPRA contractor member and LRWA member
MCS certified installer (via NAPIT), HIES member and TrustMark registered
Federation of Master Builders member
QANW insurance-backed guarantees
Manufacturer Approvals
Sika Certified Roofing Contractor
Bauder approved contractor
Polyroof approved contractor
IKO partner
Tesla Powerwall Certified Installer
Manufacturer-backed warranties where specified
Award-Winning Workmanship
RMG was named a Laureate Awards Winner at the Meistari Roofcraft Awards for the Twigs roofing and solar project, and was shortlisted in the Flat Roof Commercial Project category at the same awards. RMG has also been a finalist at the NFRC UK Roofing Awards in 2025 and 2026 and at the LRWA Awards in 2025.
Industry Recognition
Recognition from the NFRC, the LRWA and the Meistari Roofcraft Awards across commercial roofing, liquid waterproofing and integrated solar.
Owner-Led. Family-Run. Commercially Managed.
RMG Construction & Energy Ltd is led by Daryl and Nikki Cooke. Daryl brings over 25 years of roofing experience across commercial, refurbishment, heritage and new-build work; Nikki leads finance, compliance and the renewable energy division. Isabella Cooke, Apprentice Construction Technician, represents the next generation of the business.
Clients deal directly with the people accountable for their project, from first survey to handover and aftercare.
Talk to RMG About Your Next Project
Main contractors, developers, consultants and estates teams can send drawings, specifications or tender packs for a considered, fully priced proposal. Property owners and managers can arrange a roof survey or condition report.
Call 01344 952991 or email info@rmgce.com
Follow RMG
Project progress, completed work and company news from the RMG team.
