Key Takeaways:
Effective acoustic insulation requires sealing every gap where sound can leak through the walls or floors.
Airborne noise and impact noise require different sound dampening strategies.
Flexible Insulation Expanding Foam and our standard foam range deliver high-performance noise reduction and airtightness.
Fill & Paint Gap Filler provides the final finish for small interior cracks that transmit sound.
How To Have Increased Acoustic Comfort
Your home should be a calm space away from the constant noise of daily life. Sound travels easily through walls, floors, and ceilings when joints and service penetrations are left open. Acoustic insulation absorbs and reduces this sound transmission to create a quieter environment.
There are two main types of noise you need to manage. Airborne sound includes voices, music, and street traffic that travels through the air. Impact sound is the result of physical contact, like footsteps or furniture moving across the floor above you.
Insulation batts alone are not enough to stop this noise. You must properly seal every joint, cavity, and crack where sound waves can escape. Flexible Insulation Expanding Foam provides superior acoustic and thermal sealing. It expands to fill the cavity while remaining elastic. This allows the joint to move naturally without the foam cracking and letting noise through.
For standard static voids, we offer Gap Filling Expanding Foam, Gap Filling Expanding Foam – Straw, and Gap Filling Expanding Foam – Gun Grade. These products create a dense, airtight barrier that blocks sound leakage. For healthy home projects, Soudafoam SMX offers an isocyanate-free alternative that still delivers brilliant acoustic control.
When you are finishing the interior details, use Fill & Paint Gap Filler to seal fine cracks around skirting boards and window frames. This eliminates the smallest sound pathways before you paint the room. Together, these tools create an effective barrier that improves indoor comfort and energy efficiency.
Ready to start your project? Use our Store Locator to find your nearest Soudal stockist and grab the right acoustic insulation tools today.
FAQs
Does expanding foam really stop noise?
Yes. Expanding foams block the air gaps that carry airborne sound waves. By filling the entire cavity, the foam creates a dense barrier that significantly reduces noise transmission between rooms or from the street.
What is the difference between airborne and impact noise?
Airborne noise travels through the air, such as people talking or a dog barking outside. Impact noise happens when an object strikes the building structure, sending vibrations through the materials, such as heavy footsteps on a timber floor.
Can I use Fill & Paint Gap Filler outside?
Fill & Paint Gap Filler is designed for interior use to seal small cracks and joints before painting. For exterior applications, you need a highly flexible and weather-resistant product like our SMX polymer or polyurethane sealants.
How long do I need to wait before painting over the gap filler?
Our acrylic gap fillers dry quickly. Depending on the temperature and humidity, you can usually paint over them within 20 to 30 minutes. Always check the technical data sheet for the specific curing time of your product.