What is Internal wall insulation? (IWI)
What is Internal wall insulation? (IWI)
& why it might benefit you.
& why it might benefit you.
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🛠 How We Install Internal Wall Insulation
🛠 How We Install Internal Wall Insulation
At J. Barber Plastering, we offer two high-quality methods of applying internal wall insulation to solid walls, both designed to enhance energy efficiency, comfort, and finish quality.
➤ Method 1: Insulated Plasterboard Direct Fix
➤ Method 1: Insulated Plasterboard Direct Fix
We start by applying high-performance insulated plasterboards directly onto your internal walls using a strong, durable adhesive. Once in place, each board is mechanically fixed with screws or proprietary fixings to ensure maximum security and long-term stability.
This method offers:
A fast, clean installation with minimal disruption
An energy-efficient, ready-to-plaster surface
A great solution for retrofit insulation in homes across Chesterfield, Matlock, Bakewell, Rotherham, and surrounding areas
Internal wall insulation attic job completed in Matlock
➤ Method 2: Stud Wall with Cavity Insulation
➤ Method 2: Stud Wall with Cavity Insulation
For more complex walls or to improve breathability and moisture control, we may build a stud framework using either timber or metal. This creates a ventilated cavity between the insulation and the solid wall, helping to prevent condensation and damp issues.
We then:
Fill the cavity with insulation
Securely fix plasterboard to the studwork
Prepare the surface for plastering and final decoration
This method is ideal for properties prone to moisture or for clients looking for superior thermal and acoustic performance.
🌡️ Why Choose Internal Wall Insulation?
🌡️ Why Choose Internal Wall Insulation?
Upgrading your walls with IWI isn’t just about warmth — it delivers benefits that impact your comfort, your wallet, and your home's long-term value.
Upgrading your walls with IWI isn’t just about warmth — it delivers benefits that impact your comfort, your wallet, and your home's long-term value.
✅ Improves Energy Efficiency
✅ Improves Energy Efficiency
Reduces heat loss through solid walls
Helps your home stay warmer in winter, cooler in summer
Supports lower energy consumption and carbon footprint
✅ Cuts Heating Costs
✅ Cuts Heating Costs
Less energy needed to maintain a comfortable temperature
Potential to save hundreds per year on heating bills
Fast return on investment, especially with rising energy prices
✅ Enhances Home Comfort
✅ Enhances Home Comfort
Eliminates cold spots and draughty rooms
Maintains a stable indoor temperature throughout the day
Creates a more liveable, cosy environment year-round
✅ Helps Prevent Condensation & Mould
✅ Helps Prevent Condensation & Mould
Reduces moisture build-up on cold solid walls
Helps stop black spot mould growth
Promotes better indoor air quality and fewer health risks
✅ Increases Property Value
✅ Increases Property Value
Energy-efficient upgrades are attractive to buyers
Improves your home’s Energy Performance Certificate (EPC) rating
Helps your property stand out in a competitive market
✅ Quick & Affordable Installation
✅ Quick & Affordable Installation
Minimal structural work required
Less disruption than external wall insulation
Competitive pricing with long-term savings
Boost Your EPC Rating & Thermal Efficiency with J. Barber Plastering
Boost Your EPC Rating & Thermal Efficiency with J. Barber Plastering
In the UK, Energy Performance Certificates (EPCs) rate your property’s energy efficiency from A (most efficient) to G (least efficient) and are legally required when selling or renting. For landlords, the law currently demands a minimum rating of E for all tenancies, with government plans pushing toward a C rating in the coming years. Non-compliance could mean hefty fines of up to £30,000. For tenants, a better EPC rating means lower heating bills, reduced condensation and mould, and a warmer, healthier home. Improving thermal efficiency through Internal Wall Insulation (IWI), External Wall Insulation (EWI), finished with professional plastering can significantly reduce heat loss, cut energy costs, and increase property value. At J. Barber Plastering, we help homeowners, landlords, and tenants across Chesterfield, Sheffield, Matlock, Bakewell, Rotherham, Mansfield and surrounding areas to achieve higher EPC ratings, reduce their carbon footprint, and enjoy lasting comfort.
Got any questions?
Got any questions?
Contact:
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Send us pictures or a quick video of the area you’d like quoting for. Please include:
📸 Get a Quote by WhatsApp
Send us pictures or a quick video of the area you’d like quoting for. Please include:
What work you’re after (e.g. plastering, insulation)
A few clear photos or short video (including the whole wall)
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