Wall-Lag (Wales) Ltd
Merseyside
MCS certificate ELC-36312 · Verify on MCS
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From initial contact to the completion of our work Wall Lag have provided us with excellent service. Patrick listened to us as customers and our wants. He put in place a team of plumbers led by Jimmy, a man who knows heating systems inside out, who makes sure the work completed is to a high standard. Jimmy also shows his patience with a team of apprentices, allowing to build their careers. Added to this all the workmen (and Ellie!) were a delight to have in the house. They all have a determined work ethic, but are always willing for a quick chat and to answer my many, at times ridiculous, questions! We are impressed with the efficiency of installing a whole new ASHP heating system. Also, how they managed to start work so quickly for us when we were in desperate need! Wall Lag responded to any minor issues we had with solutions and have turned up to resolve minor running issues within 30 minutes of a call! I can’t fault the service, professionalism and end product. I would highly recommend giving Wall Lag a call if you are considering installing a new heating system and if possible ask for Jimmy to complete the work!
Fantastic service from start to finish on installing solar panels at my relatives property. The team attending were courteous and fully respected our property. Everything was explained fully to us and even finished on time too. Thanks so much for the install at our property. Price was very competitive also which is a bonus in the present climate. Thanks to all at Wall-lag who were involved.
I had a great experience with Wall-Lag (Wales) Ltd. The team was professional, friendly, and always kept me updated from start to finish. They installed solar panels and explained everything clearly, making the whole process easy to understand. The work was done on time, very tidy, and I’m already seeing the benefits on my energy bills. I really appreciate their reliable service and would happily recommend them to anyone looking for renewable energy solutions.
Avoid this company at all costs. We spent around £30,000 with Wall Lag and were left with faulty equipment that they refuse to put right. They do not honour their warranties, they install equipment that is unsuitable for the property (a fact that has since been verified by the ombudsman), and they repeatedly try to demand additional money to fix their own mistakes. This is not just poor service – it’s deeply dishonest. When you pay this kind of money, you expect quality, accountability, and professionalism. Instead, you get cowboys who leave you worse off than when you started. I cannot stress this enough: do not trust Wall Lag. Do whatever you can to avoid them.
Had my underfloor heating and ashp fitted by wall lag, very professional and extremely polite workers 5STARS definitely
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FAQs About Wall-Lag (Wales) Ltd
Yes. Wall-Lag (Wales) Ltd is registered under the Microgeneration Certification Scheme (MCS) (certificate number ELC-36312). MCS certification is required for your installation to qualify for the Smart Export Guarantee (SEG) and confirms the work meets recognised UK standards for safety and quality.
Wall-Lag (Wales) Ltd serves Merseyside and 9 other counties across the UK. You can see the full list of counties covered on this profile.
Wall-Lag (Wales) Ltd installs Solar PV, Heat Pumps. Every project should include a free survey, a detailed written quote, and installation by MCS-certified engineers.
Wall-Lag (Wales) Ltd holds a Google rating of 4.5 out of 5 from 52 reviews. You can read reviews and compare against other installers in Merseyside on this page.
A typical 4kW domestic solar PV system in the UK costs around £6,600 to £8,500 installed, with a payback period of roughly 11 to 13 years. Your exact price depends on system size, roof type, and whether you add battery storage. Compare quotes from installers covering Merseyside to get accurate figures for your home.
Yes. Wall-Lag (Wales) Ltd installs air source heat pumps in Merseyside. A typical air source heat pump installation costs around £8,000 to £14,000 before any grant. In England and Wales the Boiler Upgrade Scheme offers a £7,500 grant towards the cost, which an MCS-certified installer can apply on your behalf.
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