What Is Loft Insulation and Why Choose Knauf Loft Roll 44 – Combi Cut?
A well-insulated home can feel warmer in winter and cooler in summer. It can also help reduce heat loss and lower energy use. However, choosing the right materials is important if you want good results. Whether you are improving an older property or working on a new home, the right INSULATION can make a real difference.
One popular option for home improvement projects is Knauf Loft Roll 44 – Combi Cut. It is designed for loft spaces and helps reduce heat loss through the roof. Moreover, its roll format makes it suitable for many domestic loft projects.
In this guide, we explain how loft materials work, how Knauf Loft Roll 44 is made, and why it may be a useful choice for your next home improvement project. We also explain what to consider before shopping for the right product.

Why Is Loft Insulation Important?
Heat naturally moves from warm areas to cooler areas. Therefore, during colder months, heat from your home can escape through an uninsulated roof. This means your heating system may need to work harder to keep rooms comfortable.
Good INSULATION helps slow this heat transfer. As a result, your home can stay warmer for longer.
There are several benefits to improving your loft:
- Less heat loss: Helps reduce the amount of heat escaping through the roof.
- Better comfort: Helps maintain a more even indoor temperature.
- Lower energy use: Can reduce the need for constant heating.
- Improved home efficiency: Supports better overall energy performance.
- Long-term value: A suitable installation can provide benefits for many years.
Furthermore, choosing the correct loft materials can make home improvement work easier and more effective.
What Types of Loft and Roof Insulation Are Available?
Different homes need different solutions. Therefore, it is worth understanding the main product types before you buy.
1. Loft Insulation
Loft insulation is fitted between or over the ceiling joists. It helps reduce heat loss from the rooms below. Rolls and mineral wool products are common choices for domestic lofts.
2. Roof Insulation
Roof insulation helps reduce heat transfer through roof structures. The right approach depends on whether you have a cold roof or a warm roof design.
3. Thermal Insulation
Thermal insulation slows the movement of heat between spaces. It is used in roofs, walls and floors to help improve building efficiency.
4. Attic Insulation
Attic insulation is another term for materials fitted in attic or loft spaces. It can help make a property more energy efficient.
5. Loft Roll Insulation
Loft roll insulation comes in flexible rolls. It is designed for convenient fitting across suitable loft areas.
What Is Knauf Loft Roll 44 – Combi Cut?
Knauf Loft Roll 44 – Combi Cut
This product is made from glass mineral wool. It is designed for cold pitched roofs at ceiling level and offers a thermal conductivity of 0.044 W/mK.
Available through TradeBoxDirect in 100mm, 150mm and 200mm options, subject to stock.
How Is Knauf Loft Roll 44 Made?
Knauf produces this material using glass mineral wool technology. The process turns glass-based raw materials into fine fibres, which form a soft, flexible insulation material.
The fibres are then bonded using ECOSE® Technology, a plant-based binder. Next, manufacturers form the material into rolls and prepare it in different thicknesses and formats.
The Combi Cut design includes partial perforations. These allow installers to split the roll into narrower sections to suit common joist spacing. Alternatively, they can use the full-width roll as a top layer.
According to Knauf, the product also has an A1 reaction-to-fire classification.
What Are the Main Advantages?
Choosing the right INSULATION means looking at performance, ease of fitting and product quality. Knauf Loft Roll 44 offers several useful features:
- Flexible fitting: The combi-cut format suits different joist widths.
- Good thermal performance: Its declared thermal conductivity is 0.044 W/mK.
- Fire performance: It has an A1 reaction-to-fire classification.
- Easy handling: The roll format makes transportation and storage easier.
- Different thicknesses: You can select 100mm, 150mm or 200mm options.
- Versatile use: It is designed for cold lofts with insulation fitted at ceiling level.
Therefore, it can be a practical option for both renovation and new-build projects.
Which Thickness Should You Choose?
Before shopping, measure your loft and check the existing material. The right thickness depends on the current installation and your required thermal performance.
| Product thickness | Coverage per roll |
|---|---|
| 100mm | 13.89m² |
| 150mm | 9.18m² |
| 200mm | 6.84m² |
These are the listed coverage figures for the standard roll options on the TradeBoxDirect product page.
A 100mm roll may suit a first layer between joists. Meanwhile, 150mm and 200mm rolls can help build up the total depth. However, check the required final depth before ordering.
How Does Loft Roll Insulation Help Save Energy?
A suitable INSULATION layer slows heat transfer through the ceiling. As a result, rooms below the loft can retain more warmth during cold weather.
This can help reduce heating demand. However, actual savings depend on your home, heating system, existing loft condition and energy use.
For homeowners planning improvements, knauf loft insulation is worth considering when comparing products for different loft sizes.
You can also explore insulation for loft projects to find suitable materials for new installations or upgrades.
Furthermore, energy saving insulation can support a more efficient home when fitted correctly.
What Should You Check Before Installation?
Good preparation helps improve the performance of your chosen INSULATION product.
First, check the roof for leaks and signs of damage. Next, look for damp areas and deal with the cause before fitting new material.
It is also important to maintain suitable airflow around the roof space. Do not block eaves ventilation with insulation.
Excess moisture can also cause problems in a loft. Poor ventilation may increase the risk of condensation, so make sure the roof space has suitable ventilation.
Follow the manufacturer’s installation guide and wear suitable protective clothing. Also, avoid compressing the material, as this can reduce its thermal performance. Never cover electrical equipment or recessed lights unless the installation meets the relevant safety requirements.
If you plan to use the loft for storage, install suitable raised flooring rather than placing boards directly on top of the material.
Where Can You Buy Knauf Insulation Products?
Finding the right product is easier when you can compare sizes, specifications and prices in one place.
At TradeBoxDirect, you can explore the home insulation range and compare products for different building projects.
If you need a reliable roll for a domestic loft project, consider Knauf insulation and its available product options.
You can also shop for loft roll insulation to find suitable materials for your project.
Before you buy, check the pack coverage, thickness and quantity required. This helps you avoid ordering too little or too much material.
Frequently Asked Questions
1. Is Knauf Loft Roll 44 suitable for domestic lofts?
Yes. It is designed for cold pitched roofs where installers fit the material at ceiling level. It can suit many domestic loft improvement projects.
2. Can I use Knauf Loft Roll 44 between ceiling joists?
Yes. Its combi-cut design allows the roll to split into narrower sections. You can also use it at full width as a top layer.
3. Does loft insulation help reduce heating costs?
Yes. Good INSULATION reduces heat loss, which can lower the amount of energy needed to heat your home. However, savings vary between properties.
4. Is Knauf Loft Roll 44 fire resistant?
The product has an A1 reaction-to-fire classification. This means it is classified as non-combustible under the relevant European fire classification system.
5. How do I choose the correct insulation thickness?
Check your existing loft depth, joist measurements and required thermal performance. You should also consider current UK building guidance and seek professional advice if needed.
6. Where can I shop for Knauf Loft Roll 44?
You can view the product, compare thickness options and check availability at TradeBoxDirect.
Conclusion
Choosing suitable INSULATION is an important step towards creating a warmer and more energy-efficient home. Loft improvements can help reduce heat loss, improve comfort and support lower heating demand.
Knauf Loft Roll 44 – Combi Cut offers a flexible solution for suitable cold loft projects. Its glass mineral wool construction, different thickness options and combi-cut format make it a useful choice for homeowners and building professionals.
If you are planning a loft improvement project, explore the TradeBoxDirect home insulation range. Compare the available products, check the specifications and choose the right materials for your requirements.








