Spray cork provides moderate sound insulation by absorbing approximately 70% of sound energy through its millions of tiny air pockets. With an 8mm application, it can reduce noise by up to 38dB, particularly for mid to high frequencies.
Modern living brings unique challenges. Urban noise seeps through walls, neighbours share thin partitions, and home offices need acoustic comfort. Sound insulation has become essential for quality living. Spray cork emerges as a natural solution that tackles both thermal and acoustic problems in one application.
Key Takeaways
- Spray cork offers dual benefits with a Noise Reduction Coefficient (NRC) of 0.7, absorbing 70% of sound energy while simultaneously providing thermal insulation.
- An 8mm application can reduce noise by up to 38dB, particularly effective for mid to high-frequency sounds common in urban environments.
- Spray cork excels in heritage properties and solid wall buildings where traditional insulation methods may be impractical, offering a breathable solution that prevents moisture buildup.
How Spray Cork Works for Sound Insulation
Cork’s natural structure makes it particularly good at handling sound issues. The material contains millions of tiny air pockets that trap sound energy and convert it into heat rather than letting it pass through.
The science is impressive. Cork materials achieve a Noise Reduction Coefficient (NRC) of 0.7, meaning they absorb roughly 70% of sound energy that hits them. This significantly reduces internal reverberation and echo.
Independent testing shows spray cork performs exceptionally well for mid to high frequency sounds. These are exactly the frequencies common in road noise, neighbour conversations, and general ambient noise.
| Acoustic Measure | Spray Cork Performance |
|---|---|
| Noise Reduction Coefficient (NRC) | 0.7 (70% absorption) |
| Maximum noise reduction (8mm coating) | Up to 38dB |
| External road noise reduction | Up to 38dB |
| Effective thickness required | Just 8mm (2×3mm coats plus skim) |
When applied as our sprayed cork insulation service, you get both thermal and acoustic benefits in one application. It’s like getting two solutions for the price of one.
Spray Cork vs Other Soundproofing Materials
Let’s be honest about where spray cork stands against traditional soundproofing options.
| Material | NRC Rating | Thickness Needed | Thermal Benefit | Breathable | Aesthetic |
|---|---|---|---|---|---|
| Spray Cork | 0.7 | 8mm | Excellent | Yes | Attractive finish |
| Mineral Wool | 0.7–0.9 | 50–100mm | Good | No | Hidden installation |
| Acoustic Foam | 0.8–1.0 | 25–50mm | None | No | Visible panels |
| Mass-Loaded Vinyl | 0.1–0.3 | 2–4mm | None | No | Hidden installation |
Spray cork breathes naturally, preventing moisture buildup that often plagues traditional insulation materials. This breathability makes it ideal for older properties where damp can be problematic.
Best Use Cases for Spray Cork Sound Insulation
Not every acoustic problem needs the same solution, but spray cork works brilliantly in these specific situations.
Solid Wall Properties Built Before 1930
Here’s where spray cork really shines. Approximately 7.8 million UK homes were built before 1930 with solid walls and minimal insulation. These properties benefit enormously from spray cork application.
A 6mm internal layer can improve the U-value from 1.58 to 1.10 W/m²K, reducing heat loss by 30.4% while simultaneously improving sound insulation. You’re solving two problems with one application.
Heritage and Listed Buildings
Conservation regulations severely limit what you can do to listed buildings. Traditional insulation methods often require significant structural changes that conservation officers won’t approve.
Spray cork’s minimal thickness (typically 6mm) preserves architectural integrity while delivering genuine performance improvements. It’s become popular with heritage specialists for exactly this reason.
Commercial Spaces Needing Acoustic Improvement
Offices, restaurants, and retail spaces benefit from spray cork’s dual functionality. You improve thermal comfort and reduce noise pollution simultaneously.
The professional finish means it doubles as decorative coating. No need for additional paint or wall coverings in many applications.
External Facade Applications for Road Noise
External spray cork application can reduce road noise by up to 38dB. This is particularly effective for properties facing busy roads or near airports.
The weather-resistant properties mean it lasts for years without maintenance while continuously providing acoustic benefits.
Internal Wall Treatments
Spray cork works well for party walls, reducing noise transmission between properties. While it won’t meet Building Regulations Part E requirements alone, it significantly improves acoustic comfort when combined with appropriate construction techniques.
Additional Benefits Beyond Sound Insulation
Sound insulation might bring you to spray cork, but the additional benefits often seal the deal.
Thermal Performance
The thermal benefits are substantial. Spray cork acts as a continuous thermal bridge breaker, eliminating cold spots that traditional insulation methods can miss.
This thermal performance translates to real money savings. Lower heating bills, improved comfort, and potentially higher property values.
Moisture Management
Cork naturally resists moisture while remaining breathable. This combination prevents condensation build-up that can lead to mould and structural damage.
Traditional insulation materials can trap moisture, creating long-term problems. Cork’s breathable nature allows walls to dry out naturally.
Durability and Maintenance
Once applied, spray cork requires minimal maintenance. It’s crack-resistant, weatherproof, and flexible enough to move with the building without failing.
You won’t need to repaint exterior walls for years. The natural cork colour and texture age gracefully and don’t show dirt like traditional paint.
Environmental Credentials
Cork is harvested from living trees without harming them. It’s genuinely renewable and has a minimal carbon footprint compared to manufactured insulation materials.
For environmentally conscious homeowners, this matters. You’re improving your home’s performance while making an environmentally responsible choice.
Application Areas for Acoustic Improvement
The versatility of spray cork opens up numerous application possibilities for acoustic improvement.
Final Note
If you’re considering acoustic improvements for your property, we’d love to discuss how spray cork might work for your specific situation. Every property is different, and expert advice ensures you get the best possible results. Contact us today for personalised advice about your sound insulation needs.
FAQs
Can Spray Cork be used indoors for soundproofing walls?
Yes, spray cork works excellently on internal walls for soundproofing. The 8mm application reduces airborne noise by up to 38 dB whilst improving thermal performance and preventing moisture issues.
Will it reduce echo or room reverb inside?
Absolutely. Cork’s NRC of 0.7 means it absorbs 70% of sound energy, significantly reducing echo and reverberation. This creates more comfortable acoustic environments in large rooms or open spaces.
Is it suitable for ceilings or garages?
Spray cork can be applied to ceilings and works well in garages, particularly for reducing impact noise and improving thermal comfort. The flexible application adapts to various surface types.
How thick does Spray Cork need to be for sound dampening?
Standard applications use 6-8mm total thickness (typically two 3mm coats plus finishing skim). This provides optimal acoustic performance without excessive thickness or weight.
Can Spray Cork reduce noise from neighbours or shared walls?
Yes, spray cork significantly reduces noise transmission through shared walls. However, for maximum effectiveness in party wall situations, it works best as part of a comprehensive acoustic treatment rather than a standalone solution.
Does Spray Cork meet UK Building Regulations for sound insulation?
While spray cork provides excellent acoustic performance, it typically needs combining with mass-loaded systems to meet Part E Building Regulations for new construction. It excels as a supplementary treatment in renovation projects.
