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Fastwarm XPS Insulation Boards Review: Waterproof, thin insulation for tight spaces

Fastwarm 10mm XPS Insulation Boards
4.6
[Waterproof Protection]  Fully waterproof XP insulation boards resist moisture for durable, long-lasting performance.
[Adhesive Manufacturer Approved]  Certified by Ultra Tile adhesive manufacturers for reliable bonding and installation confidence.
[Exceptional Insulation Density]  Provides very high insulation values per millimeter, maximizing thermal efficiency in thin layers.
[Excellent Sound Insulation]  Effective acoustic dampening reduces noise transmission for quieter interiors.
[Low Thermal Conductivity]  Thermal conductivity of 0.034 W/mK minimizes heat transfer and improves energy savings.
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Home improvement insulation that combines thin, waterproof XPS with strong thermal and acoustic control. Helping you feel warmer and quieter indoors without rebuilding walls, Fastwarm XPS Insulation Boards suit tight spaces and retrofit work. Are these boards the right fit for your installation and adhesive requirements?

⚡ At a Glance
  • Thermal Performance: Thermal conductivity 0.034 W/mK, described as delivering high insulation per millimetre
  • Best for: Installers and DIYers needing thin, high-performance boards for insulation and soundproofing
  • Not ideal for: Projects requiring specific manufacturer approvals beyond those for tile adhesives

10mm XPS boards combine waterproof construction with noted sound insulation and a thermal conductivity of 0.034 W/mK. Approval from Ultra Tile adhesive manufacturers supports tile-bonding applications where those adhesives are specified.


Lower heat loss - with a 10mm XPS core and 0.034 W/mK thermal conductivity

Thermal conductivity of 0.034 W/mK is a direct measure of heat flow, and the product description highlights high insulation values per millimetre. That combination gives reasonable thermal resistance despite the thin 10mm profile.

Suitable where floor or wall build-ups are limited, helping retain warmth without thickboard layers. Effective for retrofit work where space is at a premium.

Water resistance for damp-prone areas - with waterproof XPS construction

Product descriptions explicitly state the boards are waterproof, meaning they resist water absorption rather than relying on surface treatments. Waterproof behaviour reduces the risk of moisture degrading the board over time.

A dependable choice where moisture exposure is a concern when used alongside approved adhesives, lowering the chance of water-related deterioration. Practical for areas where a moisture-resistant layer is needed.

Improved acoustic performance - with excellent sound insulation properties

Descriptions note excellent sound insulation and user feedback highlights use for soundproofing, indicating noticeable reduction in noise transmission when incorporated into assemblies. Acoustic benefit appears alongside thermal performance.

Valuable for reducing airborne noise between rooms or floors when installed correctly. Handy for renovations aiming to improve comfort without major structural changes.

✨ The 4 Key Reasons for Fastwarm XPS Insulation Boards
  1. Waterproof construction - Keeps panels dry, reducing moisture-related damage risk over time
  2. High insulation per millimetre - Maximises thermal resistance while saving internal space
  3. Approved for tile adhesives - Compatible with Ultra Tile adhesive manufacturers' recommendations during tiling
  4. Easy to handle - Lightweight boards simplify transport and speedy on-site fitting
📋 Technical Details at a Glance
  • Category: Home Improvement
  • Brand: Fastwarm
  • Material: XPS
  • Thickness: 10mm
  • Thermal conductivity: 0.034 W/mK
❓ Frequently Asked Questions

Q: Are these boards waterproof?

A: Yes, product descriptions state the boards are waterproof, so they resist water absorption.

Q: Can these boards be used with tile adhesives?

A: Yes, the boards are approved by Ultra Tile adhesive manufacturers, indicating compatibility with those adhesive systems.

Q: Are they suitable for soundproofing?

A: Yes, descriptions and user feedback cite excellent sound insulation and use for soundproofing, making them suitable for acoustic improvement tasks.

🏆 Our Verdict

The Fastwarm XPS Insulation Boards are suitable for installers and DIYers who need thin, waterproof insulation that also helps reduce noise. The combination of a 10mm XPS construction, 0.034 W/mK thermal conductivity, and approval from Ultra Tile adhesive manufacturers is the key selling point. While budget considerations will vary, durability and multi-function performance offer solid long-term value.