Frequently Asked Questions About Wallrock Thermal Liner KV600
When it comes to insulating walls without the disruption of major renovation, few solutions are as effective or straightforward as Wallrock Thermal Liner KV600. As the most advanced product in the Wallrock’s thermally efficient wallpaper range, KV600 combines robust construction with noticeable comfort and energy-saving benefits.
Below, we answer the most frequently asked questions about Wallrock Thermal Liner KV600 - covering what it’s made of, how it works, how to install it, and whether it’s worth the investment.
What Is Wallrock KV600 Thermal Liner and What Is It Made Of?
Wallrock KV600 is a heavy-duty thermal wall liner designed for internal use on both new and existing walls. Unlike standard lining paper, it’s a composite material, made from a thick, felted polyester insulation layer that’s permanently bonded to a reinforced wallrock liner surface.
The result is a liner that is:
- Tough and durable enough to handle uneven or cracked walls,
- PVC-free and breathable, allowing moisture to escape naturally, and
- Thermally efficient, helping to retain warmth inside your home.
So, what is Wallrock KV600 made of? — a unique, PVC-free blend of polyester fibres and high-grade Wallrock liner that works together to improve insulation, comfort, and wall quality.
Is Wallrock KV600 Any Good?
In short — yes, and not just for insulation. Wallrock KV600 is highly regarded for its all-round performance. It doesn’t simply keep heat in; it also:
- Smooths over uneven or tired plaster,
- Combats condensation and mould growth,
- Reduces cold spots and draughts, and
- Creates a strong base for paint or decorative paste-the-wall type of wallpaper.
Because it reflects heat back into the room and slows down cooling, many users notice that rooms feel warmer for longer — meaning radiators don’t need to work as hard. This combination of insulation and surface improvement makes Wallrock KV600 a sound investment for both comfort and energy efficiency.
What Is the Difference Between Wallrock Thermal Liner and KV600?
A common question is: What is the difference between Wallrock Thermal Liner and KV600?
Both belong to the same high-performance Wallrock range, but KV600 is 25% thicker and heavier, offering a measurable boost in insulation. While the standard Thermal Liner suits most domestic applications, KV600 is particularly beneficial for:
- Older properties with cold, solid walls,
- North-facing rooms that struggle to retain warmth, and
- Other spaces requiring enhanced durability.
To put it simply, Wallrock Thermal Liner is great for comfort improvement, while KV600 provides an extra layer of thermal performance where you need it most.
How Does Wallrock KV600 Work?
Wallrock KV600 works by creating an insulating barrier between your wall and your living space. The thick polyester core retains warmth at the wall surface, reducing heat loss and reflecting heat energy back into the room.
This means:
- Walls warm up faster,
- Rooms reach temperature more quickly, and
- Energy consumption can decrease over time.
Because KV600 is also breathable, it helps to prevent moisture build-up - a key cause of mould. This dual effect (warmth retention and condensation control) is what makes it so effective in everyday use.
Wallrock KV600 Thermal Liner Installation
The following video offers advice on how to apply the traditional Wallrock Thermal Liner, but the concepts can be applied the same to Wallrock KV600 thermal liner.
Wallrock KV600 is designed with simplicity in mind. It uses a paste-the-wall application method, which means you apply the specially formulated Wallrock Thermal Liner Adhesive directly to the wall before hanging the liner from the roll.
Here’s how to achieve the best results:
- Prepare the surface: Clean and smooth the wall. If it’s an older wall, apply a primer for better adhesion.
- Measure and cut: Cut lengths to fit your wall height, allowing a little extra for trimming.
- Apply adhesive: Paste the wall evenly with the recommended adhesive.
- Hang the liner: Press the KV600 firmly onto the wall, smoothing out air bubbles.
- Finish and decorate: Once dry, you can paint over the liner or hang another wallpaper on top. If using the latter, please ensure that the liner is paste-the-wall type (non-woven).
Dimensions: Each roll is 15 metres long, 1 metre wide, and approximately 4 mm thick, covering 15 m², which is double the coverage of a standard Wallrock Thermal Liner roll.
Can You Paint Directly Onto a Wallrock Thermal Liner?
Yes. Once it’s fully dry, you can paint directly onto Wallrock KV600, allowing you to match it perfectly to your décor. For a premium finish, many professionals apply one of Wallrock Fibreliners on top before painting.
How Long Does It Take for Wallrock Thermal Liner to Dry?
Drying times vary depending on room temperature and ventilation, but 24 hours is typically sufficient. Avoid painting or wallpapering until the liner feels completely dry and secure.
How Long to Leave KV600 Before Wallpapering?
If you plan to apply wallpaper over Wallrock KV600, wait until it’s dry (usually 24–48 hours) to ensure proper adhesion and a flawless finish. Please use paste-the-wall type of wallpaper or liner.
Is Wallrock Thermal Liner Breathable?
Yes - Wallrock KV600 is breathable, meaning it allows water vapour to pass through while maintaining insulation. This combats damp patches and promotes healthier wall conditions.
Wallrock Thermal Liner KV600 Reviews and Real-World Feedback
When looking at Wallrock Thermal Liner KV600 reviews, users often highlight three consistent benefits:
- Noticeably warmer rooms and faster warm-up times,
- A reduction in condensation and black mould, and
- Smooth, long-lasting results that improve the appearance of tired walls.
Tradespeople also value its strength — it doesn’t tear easily during installation and resists sagging over time. For homes with persistent cold walls or recurring damp, KV600 is one of the most trusted and cost-effective solutions available.
Final Thoughts
Whether you’re upgrading an older home or simply want to make a cold room more comfortable, Wallrock KV600 Thermal Liner offers a practical, lasting way to improve warmth and energy efficiency. It’s easy to install, breathable, durable, and suitable for painting or wallpapering.
By choosing Wallrock KV600, you’re not only saving energy — you’re investing in a healthier, warmer home.
Explore the full range of Wallrock thermally efficient wallpapers at https://coveryourwall.co.uk/collections/wallrock-thermal-liners
