The quick way to find a local Cavity Wall Insulation specialist in Harpenden

London City Roofing & Renovation

Cavity Wall Insulation

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London City Roofing & Renovations ltd is an established and trusted company with over 20 years experience, offering all aspects of roofing and building services. We are based in Wembley (London) serving all of London and surrounding areas within 100 miles.? We pride ourselves on our punctuality and quality workmanship, offering a prompt and professional service with experienced and expert staff. We guarantee a friendly, clean and tidy service with all work being to the highest standard. We are fully insured and all work is guaranteed. All our tradesmen are experienced and qualified in their respective trades. We specialise in the following: Roofing services: UPVC Fascias & Soffits Cladding Guttering Bargeboards Flat Roofing Chimney Repairs Tile & Slating Work Re-Roofs Lead Work General Building Work Fibre Glass Roofing Double Glazing Building services: Home improvements Kitchen Fitting Bathroom Fitting Extensions Loft Conversions Garage Conversions Bricklaying Plastering Comprehensive driveway and paving service, including: Driveways Drop Kerbs Patios Paths Block Paving Concreting Tarmacing Car Port We offer free quotes

Latest homeowner review

Reviewed by Richard on 22/11/2024

John and the team did an outstanding job. It was easy to work with John and he was very knowledgeable, and provided very sensible advice. Other people quoted work which was over-the-top or wouldn't have solved the problem but John got right to the issue in a no-nonsense way. Quality of the work undertaken was very good, considering the age of the building and complexity. Would recommend.

J T Morgan Brickwork

Cavity Wall Insulation

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JT Morgan Brickwork is a family business operating for over 20yrs. From laying garden walls to extensions we take pride in offering all customers nothing but the best value for money.The majority of my work comes by recommendation from previous clients.

Latest homeowner review

Reviewed by Richard on 22/2/2025

Very tidy and professional job. Turned up on time kept everything clean and tidy and did the job well. Would recommend and use again.

JS7 Service LTD

Cavity Wall Insulation

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I am an experienced builder providing a wide range of interior and exterior construction services. I specialise in all aspects of building work, including bricklaying, plastering, painting and decorating, paving, flooring, plumbing, and fencing. I also carry out complete projects such as driveways, kitchens, bathrooms, garage builds, extensions, and loft conversions. From small repairs to full renovations, I handle every job with care and attention to detail. I take pride in delivering high-quality, strong, and reliable work, ensuring every project is completed to a professional standard. I focus on good workmanship, safety, and customer satisfaction at all times. I am hardworking, trustworthy, and able to work independently or as part of a team. No job is too big or small, and I always aim to finish on time and within budget.

Latest homeowner review

Reviewed by Noel on 8/5/2026

Very happy with the garden wall repair. Neat work. Good workers.

Arch Construction and Project Management Ltd

Cavity Wall Insulation

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Arch Construction and Project management Ltd is specialist of structural engineering.We offer full project management from concept to completion based on 18 years experience in construction industries with hassle free experience. Member of Federation of Master Builders and TrustMark reg. Fully insured.

Ajila LTD

Cavity Wall Insulation

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Ajila Limited is a professional construction company specializing in house refurbishment. With a commitment to quality craftsmanship and attention to detail, we transform homes to meet the highest standards of functionality and style. Whether it's a full renovation or specific improvements, our experienced team delivers exceptional results that enhance both the beauty and value of your property. The company engages in multiple trades which includes plumbing, kitchen, bathroom, tiling, extension, home refurbishment etc

H&R Renovations LTD

Cavity Wall Insulation

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H&R Renovations ltd always aims to deliver a high standards of work qualities to satisfy all my clients expectations and meet theirs satification.

Dragoi Construction LTD

Cavity Wall Insulation

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Dragoi Construction Ltd is a professional construction firm specializing in painting, plastering , demolation, buildingworks, paving , joinery, ground working, refurbishments , extensions, residential construction. With over 8 years of experience in the industry, we have built a reputation for delivering high-quality projects on time and within budget. We pride ourselves on our commitment to excellence, innovative solutions and customer satisfaction. Our team of highly skilled professionals is making sure that each project meets the highest standards of quality and safety. Why choose us: - experience – over 8 years - quality – use of top-grade materials and advanced construction techniques - customer focus – dedicating to meeting the unique needs and expectations of our clients - safety – adherence to strict safety protocols to ensure the well- being of our workers

Tekton Build LTD

Cavity Wall Insulation

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We are a well established Building company with over 20 years experience in the building trade. We build everything from New Homes, extensions, alterations and renovations.

Tennants Building Services

Cavity Wall Insulation

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We are a Father and Son team with 25+ years of experience in the construction industry, specializing in extensions and outbuildings.

Latest homeowner review

Reviewed by Leanne on 3/6/2025

Placed advert Thursday. Contacted same day by Mike with a view to coming out and quoting next day. Came on time priced the job on Friday and arranged to start work on the Tuesday. Mike worked with his son Silas. What a really nice pair. Genuine, polite and got on with the job even though I asked for a few tweaks along the way. Both very old school and worked at their own pace - happy with work carried out and will use them again. Reasonable price too.

Lynton Industry Ltd

Cavity Wall Insulation

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Team of highly skilled and experienced landscapers and builders with a passion for design and producing high quality work.

H&S LOFTS LTD

Cavity Wall Insulation

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I’m general working carpentry/renovations/painting/kichen/bathrooms /dry lining /fencing /driveways

PRINCETON ECO PLUS SERVICES LTD

Cavity Wall Insulation

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Flexible finance options available – spread the cost of your installation with affordable monthly payments (subject to status). Princeton Eco Plus Services LTD is a trusted, fully accredited UK energy efficiency contractor, delivering safe, compliant, and high-quality home improvement solutions you can rely on. With over 7 years of industry experience, we help homeowners and landlords improve the comfort, efficiency, and long-term performance of their properties through professionally delivered installations. Our services include loft insulation, cavity wall insulation, boiler installations and upgrades, air source heat pumps (ASHP), and solar PV systems. Every project starts with a thorough property assessment and clear, honest advice tailored to the home and customer's needs. We are PAS 2035 compliant, TrustMark registered, and Gas Safe registered, ensuring all work meets current regulations and industry best practice. We work with experienced installers and trusted manufacturers to deliver reliable, long-lasting results. From initial enquiry through to installation and aftercare, we provide a transparent, end-to-end service with clear pricing and no hidden costs. Marigold Insulation supports homeowners, landlords, and property investors looking to reduce energy bills, improve EPC ratings, and future-proof their homes.

JK Construction

Cavity Wall Insulation

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Professional and qualified bricklayers

Arti Construction

Cavity Wall Insulation

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This is Altin Company Arti construction Email:altin_lama@live.com We do lofts conversion Extensions House Refurbishment 16 years of experience

Latest homeowner review

Reviewed by Anthony on 5/11/2024

Excellent all round. Responded promptly, good quote and quality job. Thanks Altin and bro.

S&D Construction Services

Cavity Wall Insulation

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S&D Construction Services is a premier general construction business with over of 23 years of Experience in the construction industry, we have established ourselves as a leader in delivering comprehensive construction services with a wide range of sectors including residential and commercial projects across London Our mission is to provide exceptional construction services and client-focused approach to every project we undertake

Latest homeowner review

Reviewed by Richard on 11/2/2026

Nicolae was great to work with, very accommodating, quick and unphased by bad weather. Did an excellent job with the blockwork at a good price and a good job with the plastering, which was little bit more expensive, but worth the assurance of having the same person do both jobs. Would recommend for similar, quick turnaround jobs.

R&D Construction

Cavity Wall Insulation

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View ProfileRequest a quote07859888537

R&D CONSTRUCTION IS A PROFESSIONAL DESIGN AND BUILDING COMPANY SPECIALISING IN ARCHITECTURAL DESIGN AND PROJECT MANAGEMENT FOR RESIDENTIAL AND COMMERCIAL PROPERTIES, ALSO A WIDE RANGE OF CONSTRUCTION, DEVELOPMENTS AND REFURBISHMENTS. We Carry out all type of construction and to us no job is a small job and by that we mean we would be happy to take your various jobs in our hands. We provide the following list of the building services: New Build Property Refurbishment Loft Conversion House Extensions Flat Conversion Driveway & Patio Bricklaying & Re-pointing Kitchen & Bathroom Roofing & Guttering Plastering & Tiling Carpentry & Joinery Painting & Decorating Plumbing & Electrical Central Heating & Under Floor Heating Design We believe a great design is simple and not only how it feels or looks but also how it works. We provide Architectural and Interior Design and Engineering Services: Initial Concept Design Basic Drawings for Planning Application & Application Management Existing & Proposed Floor Plans, Elevations and Sections Site Plans and Block Plans (OS map/ Location Plan) Detailed Architectural Design 3D Concept and Visualisation Design Interior Furnishing, Materials & Fabrics Lighting Design Bills of Quantities (BOQ) 3D Interior Visualisation Design 3D Interior Visualisation Design Building Control package Drawings & Application Management

Latest homeowner review

Reviewed by KETAN on 18/3/2026

TMC Roofing and Building LTD

Cavity Wall Insulation

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We are a family run business which cares for our customers needs we do all building services inside and outside of properties

U&U Construction LTD

Cavity Wall Insulation

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We specialise in all aspects of construction work. We are completely dedicated to our work and put our experience into the job to make our customers satisfied. We aim to do our best and succeed 100%.

Latest homeowner review

Reviewed by Ralf on 9/4/2018

One to be careful with is the electrician Ben. The work seems alright, but his advise left us with excessive lighting in Kitchen and sitting room and our decision against TV sockets in ALL rooms was interpreted as NO TV and phone socket at all, which then later had to be added at extra cost and left the choice of suppliers limited. His crew also did the plumbing and the bathroom installation and the later was not done to the general standard of U&U constructions work.