Loft Insulation
⚠️ Landlords: It’s Now Illegal to Let Properties with a Poor Energy Rating
Ignore the rules, and you could face fines, void leases, and legal action.
As of 1st April 2018, it became illegal to rent out any residential or commercial property with an EPC (Energy Performance Certificate) rating of F or G.
But the law got even tougher:
Since 1st April 2023, existing rental contracts are also unlawful if the property falls below the legal energy efficiency standard. If your EPC is still showing F or G, you’re breaking the law and enforcement penalties are already in motion across Wales and England.
❌ What This Means For You:
- You cannot legally let a property with an EPC of F or G
- You could be fined up to £5,000 per property
- You risk voiding tenancy agreements
- You could face enforcement action by local authorities
- You may be forced to make upgrades under time pressure
🛠️ How to Stay Compliant: Upgrade Your Loft Insulation — Now.
Loft insulation is one of the fastest, cheapest and most effective ways to improve your EPC rating. It’s also the first place assessors check for energy loss.
At Just Lofts, we specialise in removing old, ineffective insulation and installing EPC-compliant, high-performance solutions safely, quickly, and professionally.
✅ Approved Loft Insulation Options
We supply and install energy-rated, regulation-compliant insulation materials. Here’s what you can choose from:
🔶 Knauf Loft Roll 44
- Glass Mineral Wool
- U Value: 0.044 W/mK
- Ideal for: Homes built post-1980s
- Excellent value, fast install, meets EPC targets
🔶 Knauf Loft Roll 40 (Premium)
- Glass Mineral Wool with ECOSE® Bio-Binder
- U Value: 0.040 W/mK
- Best for: Older properties or upgrades
- Non-combustible, Euroclass A1 fire rated
- Superior performance for tougher EPC gains
🐑 Thermafleece CosyWool (Sheep Wool)
- U Value: 0.039 W/mK
- Ideal for: Period homes, breathable spaces
- 75% wool, 25% recycled polyester
- Safe to handle, strong acoustic and thermal rating
- Natural, sustainable, and highly effective
♻️ SupaSoft Recycled Plastic Insulation
- U Value: 0.16 W/mK (note: not suitable where U-value targets are strict)
- Made from UK recycled plastic bottles
- Non-itch, non-toxic, eco-friendly
- Great for non-technical spaces (e.g. garages, sheds, annexes)
🚫 DIY Won’t Cut It — and Could Cost You More
Old fibreglass, underfilled rolls, or patchy DIY insulation won’t meet regulations. Worse, attempting removal yourself exposes you to dangerous fibres and health risks.
We use full PPE, proper filtration, and safe waste disposal — giving you peace of mind, full compliance, and a certified install you can prove.
🏠 Letting Agents & Portfolio Landlords: We’re Ready to Work at Scale
We handle single homes or entire portfolios — with a fast turnaround, written certification, and no-nonsense pricing.
📞 Call Just Lofts Today: 07514 795 000
📍 Serving Cardiff and a 50-mile radius
⚠️ Don’t Wait for a Fine. Don’t Risk a Void Tenancy.
Get compliant. Get upgraded. Get it done right — with Just Lofts & Build.