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Claim this listingWall-lag (wales) Ltd
4.5
52 Google reviews
1–2 days
Typical install time
£7,500
BUS grant amount
About Wall-lag (wales) Ltd
Wall-lag (wales) Ltd is an MCS certified air source and exhaust air installer based in Flintshire. They are registered with the Boiler Upgrade Scheme, meaning they can help you claim up to £7,500 towards your installation.
Coverage area
Based in Flintshire, CH7 1HA
Areas served:
Reviews
4.5
52 Google reviews
Based on verified Google reviews
Sharon Walker
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.
aziz demirtas
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.
Laurence Edwards
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.
philip brown
Had my underfloor heating and ashp fitted by wall lag, very professional and extremely polite workers 5STARS definitely
Ewan Nichols
Had solar fitted 4 months ago, could not be happier. Surveyor explained installation progress, Lads fitting the panels were great and the electricians set everything up including an app on my phone. Highly Recommended
Showing 5 of 52 reviews. View all on Google
Frequently asked questions
How do I know you’re properly qualified and certified to install heat pumps?
We are MCS‑certified and registered with an approved consumer protection/competent person scheme, which is essential for quality assurance and to access grants like the Boiler Upgrade Scheme (BUS).
Can you tell me if a heat pump is actually suitable for my home?
We carry out a detailed home assessment, including property type, insulation levels, existing heating system and available outdoor space, to confirm whether a heat pump is a good fit.
What type and size of heat pump will you recommend for my property, and why?
We design the system using a heat‑loss calculation for your home, then match the correct kW size and model (for example, air‑source vs ground‑source) so it runs efficiently and reliably.
What will the full installation cost be, and what’s included in your quote?
Our fixed quote clearly lists the heat pump, cylinder, controls, labour, scaffolding (if needed), electrical work and any radiator or pipework upgrades, so you know exactly what you’re paying for.
Can you help me access government grants like the Boiler Upgrade Scheme?
Yes, as an MCS installer we can confirm your eligibility, apply for the BUS grant (worth up to £7,500) on your behalf and deduct it directly from your quote.
How much disruption should I expect during installation, and how long does it take?
A typical air‑source heat pump installation takes around 2–5 days, and we’ll agree locations for the indoor and outdoor units, manage any planning considerations and keep you informed each day.
Will I need to replace my radiators or upgrade anything else in my home?
After the heat‑loss survey, we’ll advise if any radiators, pipework, electrics or hot‑water cylinder need upgrading so the system can run efficiently at lower flow temperatures.
How noisy is the outdoor unit and where will it be installed?
Modern heat pumps are designed to be quiet and must meet UK noise regulations; we’ll position the unit to minimise any impact on you and your neighbours and comply with local planning rules.
What warranties, servicing and aftercare do you provide?
You’ll get manufacturer warranties on the heat pump plus our workmanship guarantee, and we offer ongoing servicing and support to keep your system performing at its best.
What running costs and savings can I realistically expect compared to my current boiler?
We’ll estimate your likely annual running costs and potential savings based on your current fuel type, insulation level and tariffs, using real‑world performance data rather than lab figures.
Boiler Upgrade Scheme
Up to £7,500
off your heat pump installation
This installer handles the full BUS grant application — deducted directly from your quote. No upfront payment needed for the grant amount.
Scheme open until 2028 — limited funding available
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