Insulation 45mm | Insulation Board

In the ever-evolving domain of thermal insulation, the 45mm insulation category on Insulation4less offers a wider range of products, engineered for optimal thermal performance, that don’t compromise on space utilisation. The 45mm insulation materials are perfectly suited for applications where space is at a premium but where robust thermal performance is paramount.

Knauf XPS Thermal Laminate Plus

Among the splendid offerings in this category is the Knauf XPS Thermal Laminate Plus, available in various sizes to cater to diverse needs, without compromising the desired performance levels. This solution is adept at offering the perks of a high-quality insulator paired with the bonus of laminate, ensuring a user-friendly application and stellar, long-lasting thermal performance.

Knauf's XPS

These 45mm insulation materials are pivotal for ensuring top-notch thermal protection, especially pertinent in properties where available insulation space is restricted. Solutions like Knauf's XPS Thermal Laminate Plus are not just conducive to exceptional thermal performance but are also noteworthy for their lightweight and ease of installation.

Why Choose 45mm Insulation?

Ideal for both new constructions and refurbishments, 45mm insulation boards are versatile and efficient. They are particularly suited for:

• Wall Applications: Enhance thermal resistance in cavity and solid walls, reducing heat loss and energy bills.
• Flooring Projects: Perfect for underfloor heating systems or where floor height adjustments are minimal.
• Roof Installations: Suitable for pitched and flat roofs, ensuring optimal thermal performance without adding excessive weight.

Benefits of 45mm Insulation Slabs

• Space Efficiency: Slim profile ensures minimal intrusion into living spaces.
• Thermal Performance: Reduces heat loss, leading to energy savings and increased comfort.
• Versatility: Suitable for various applications, from walls to floors and roofs.
• Ease of Installation: Lightweight and manageable, facilitating quicker installation times.

Applications of 45mm Insulation Board

45mm insulation is a smart choice when you need high performance in a slim profile. Ideal for retrofit and space-sensitive projects, its applications include:

• Internal and External Walls: Achieve excellent thermal resistance in cavity or solid wall constructions.
• Flat & Pitched Roofs: Perfect for roof spaces where depth is limited but insulation is crucial.
• Underfloor Heating Systems: Slim enough to work under flooring while still delivering strong thermal benefits.
• Timber & Steel Framing: Lightweight and easy to cut, making it ideal for modern frame constructions.

This thickness is especially popular in refurbishments, loft conversions, and areas where minimising wall or ceiling thickness is important.

No Compromise on Quality with 45mm Insulation

Don’t let the slim profile fool you — our 45mm insulation products are engineered to deliver outstanding thermal performance. Using high-performance materials like PIR, multifoil, and reflective barriers, each product is tested and trusted for UK building standards.

With options from top brands like Celotex, Kingspan, Ecotherm, and Superfoil, you're guaranteed insulation that’s long-lasting, moisture-resistant, and energy efficient — without sacrificing build quality or reliability.

Our 45mm insulation range includes a variety of high-performance solutions such as insulation slabs, insulation foil, and roll insulation — all designed to meet diverse project requirements. Whether you're looking for PIR boards or multifoil systems, our collection ensures maximum thermal efficiency in a slim profile. You can easily add your preferred products to your basket and explore quantity discounts for bulk purchases. We've made it simple to list the right materials for your job, whether it’s for professional builds or personal renovation projects.

Why Choose Insulation4Less?

At Insulation4Less, we go beyond just selling insulation — we help you build better. Here’s why customers trust us:

• Wide Selection: We stock leading brands and specialist products in 45mm insulation.
• Expert Advice: Not sure what you need? Our knowledgeable team can guide you to the right solution.
• Competitive Prices: Get premium insulation without the premium price tag.
• Nationwide Delivery: Fast, reliable delivery to your site or doorstep across the UK.
• Trusted by Trade & DIY: Whether you’re a contractor or a homeowner, we’ve got you covered.

Make your space warmer, more efficient, and better built — shop 45mm insulation today at Insulation4Less.