about internal wall insulations (iwi or tiwi)

1. Internal Wall Insulation: What It Is and Why You Should Consider It

Internal wall insulation (IWI) is an effective solution for improving your property's energy efficiency and comfort. Whether you’re renovating an older building or looking for ways to lower energy bills, IWI is a practical option to consider. Here, we’ll explore what internal wall insulation is, how it works, and the benefits it provides.

What is Internal Wall Insulation?
Internal wall insulation involves fitting insulation materials to the inside walls of your property to enhance thermal performance. This solution is especially popular for older homes with solid walls that lack built-in insulation.
The system typically includes:

• Insulation boards or slabs – made from materials such as rigid foam, mineral wool, or natural fibers.

• Vapour control layers – to prevent moisture build up.

• Plasterboard or finishing layers – applied over the insulation for a smooth, finished appearance.

• Spray cork insulation – an innovative, eco-friendly thin solution 

• IWI or TIWI is a cost-effective and less invasive alternative to external wall insulation, suitable for listed buildings or properties where external alterations are not permitted.

How Does Internal Wall Insulation Work?
By adding a layer of thermal insulation to your internal walls, IWI reduces heat loss and keeps your home warmer in winter and cooler in summer. This not only improves comfort but also lowers your heating and cooling costs.

                    Benefits of Internal Wall Insulation

1. Enhanced Energy Efficiency
   Internal wall insulation can reduce heat loss by up to 45%, leading to significant savings on your energy bills.
2. Improved Comfort
   With better thermal performance, IWI ensures a consistent indoor temperature, keeping you cosy all year round.
3. Reduced Carbon Footprint
   By using less energy to heat your home, you contribute to reducing greenhouse gas emissions.
4. Affordable Solution
   Compared to external wall insulation, IWI is often more cost-effective and quicker to install.
5. Ideal for Heritage or Listed Properties
   If you’re unable to alter the exterior of your building, IWI provides an excellent alternative for enhancing energy efficiency without changing the facade.
6. Noise Reduction
   Internal wall insulation adds a layer of soundproofing, reducing noise from adjacent rooms or outside.
7. Customizable Finish
   After installation, your walls can be plastered and painted to match your interior decor.

                    Types of Internal Wall Insulation

1. Rigid Insulation Boards
   These pre-formed panels are easy to install and highly effective at reducing heat loss. Common materials include PIR and phenolic foam.
2. Insulated Stud Walls
   This method involves building a stud framework and filling it with insulation material like mineral wool.
3. Flexible Rolls or Slabs
   Ideal for irregular surfaces, these materials are flexible enough to fit uneven walls while providing excellent thermal performance.
4. Spray cork insulation is a versatile and sustainable alternative to traditional materials. Made from natural cork granules, it’s applied directly to walls in a thin layer, forming a seamless thermal barrier. Unlike rigid boards or rolls, spray cork conforms to uneven surfaces, making it ideal for older buildings.
   Spray cork doesn’t just insulate—it also offers soundproofing, damp resistance, and a unique textured finish, making it both functional and aesthetic.

                    Is Internal Wall Insulation Right for Your Property?
                   IWI or TIWI is a great option for:

• Older homes with solid walls.
• Listed or heritage properties where external changes are restricted.
• Buildings in urban areas where soundproofing is a priority.
• However, it does reduce the internal floor area slightly, which may be a consideration for smaller rooms.

Why Choose Internal Wall Insulation?
Installing internal wall insulation is a smart investment in your home’s future. It helps you save on energy bills, reduces your carbon footprint, and improves indoor comfort, all while   preserving your property’s external appearance.

Start Your Internal Wall Insulation Project Today

Ready to make your home more energy-efficient? Contact LM finishes for expert advice, tailored solutions, and professional installation services.

With internal wall insulation, you’re not just insulating your home—you’re improving your quality of life and reducing your environmental impact.