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Low & Bonar · Acoustic Floor Underlay
EnkaSonic Products
EnkaSonic is an impact-sound insulation underlay for floating floor build-ups. Its engineered core decouples the floor from the structure to reduce footfall and impact noise between levels — available in multiple thicknesses to match your acoustic and build-height requirements.
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Impact-sound floor insulation
American made, ISO 9001
Guide
A Practical Guide to EnkaSonic Acoustic Floor Underlay
Footsteps, dropped objects, and moving furniture all create impact noise — sound that travels through the floor structure into the rooms below. In apartments, condos, hotels, and multi-level buildings, controlling that noise is often a code requirement and a major comfort issue.
EnkaSonic is an acoustic underlay that sits beneath a floating floor build-up. Its engineered core separates — or "decouples" — the finished floor from the structural slab below, interrupting the path that impact sound would otherwise travel and noticeably reducing footfall noise between levels.
How Impact-Sound Underlay Works
Impact noise happens when an object strikes the floor and the energy passes straight into the slab, which then radiates sound into the space below. A "floating floor" breaks that connection.
Decoupling: EnkaSonic creates a resilient layer between the slab and the floor build-up above it, so the two are no longer rigidly connected. The underlay absorbs and dampens impact energy instead of letting it pass straight through.
Floating build-up: A screed or board layer sits on top of the underlay, isolated from the structure at the perimeter as well, so the finished floor effectively "floats." This is what gives the assembly its impact-sound performance.
Thicker EnkaSonic products generally provide more separation and higher impact-sound reduction, which is why the line is offered in several thickness tiers.
Benefits & Where It's Used
Key Benefits
- Reduces footfall and impact noise between floors
- Decouples the floor build-up from the structure
- Multiple thicknesses for different acoustic targets
- Works under screed and floating floor systems
- Lightweight and supplied in easy-to-handle rolls
- Durable, rot-resistant synthetic construction
Common Applications
- Apartments, condos, and multi-family housing
- Hotels and hospitality
- Offices and commercial fit-outs
- Schools and institutional buildings
- New construction and renovation
- Under screed, plywood, or panel floors
EnkaSonic Roll Sizes at a Glance
EnkaSonic is offered in several series. All rolls are 39" wide; the roll length decreases as the underlay gets thicker, so heavier acoustic tiers cover less area per roll. Use this as a quick reference when planning coverage — full specs are on each product page.
| Product | Roll size | Tier |
|---|---|---|
| EnkaSonic 125 A-105 | 39" × 285' | Thinnest / most coverage per roll |
| EnkaSonic 250 A-106 | 39" × 145' | Mid |
| EnkaSonic 250 A-109 Plus | 39" × 110' | Mid (Plus) |
| EnkaSonic 400 A-110 | 39" × 90' | Thicker |
| EnkaSonic 400 A-113 Plus | 39" × 80' | Thicker (Plus) |
| EnkaSonic 750 A-114 | 39" × 48' | Thickest |
| EnkaSonic 750 A-116 Plus | 39" × 46' | Thickest (Plus) |
Rule of thumb: higher series numbers indicate a thicker underlay, which generally means greater impact-sound separation but less coverage per roll. Match the series to the acoustic performance your project (or local code) calls for, then size the number of rolls to your floor area.
Installation Overview
EnkaSonic installs as the resilient layer in a floating floor build-up. Exact details depend on your floor system, so always follow the manufacturer's instructions and your acoustic design — the steps below are a general overview.
- Prepare the subfloorMake sure the structural slab or subfloor is clean, sound, and reasonably level before laying the underlay.
- Roll out the EnkaSonicLay the underlay across the floor, trimming to fit and butting or lapping seams per the system requirements.
- Isolate the perimeterTurn the underlay up at walls and columns (or use a perimeter strip) so the floating layer doesn't bridge to the structure at the edges.
- Install the floating layerPlace the screed, boards, or panels over the underlay to form the floating build-up that carries the finished floor.
- Finish the floorLay the final floor covering on top, keeping the assembly isolated from the structure to preserve acoustic performance.
FAQ
What is EnkaSonic used for?
It's an acoustic underlay that reduces impact (footfall) noise between floors by decoupling a floating floor build-up from the structure below.
What's the difference between the series?
The series numbers (125, 250, 400, 750) indicate different underlay thicknesses. Thicker products generally provide more impact-sound separation but cover less area per roll. "Plus" versions are enhanced variants within a tier.
How wide are the rolls?
All EnkaSonic rolls are 39" wide. Roll length varies by series — from 285' on the thinnest product down to 46' on the thickest.
Where is EnkaSonic installed?
Beneath a floating floor build-up — between the structural slab or subfloor and the screed, board, or panel layer that carries the finished floor.
Where do Enka products ship from?
Enka Solutions products ship from North Carolina.
What is the shipping cost?
All Enka items ship for free.
What are the quality standards of the manufacturer?
These products are American made in an ISO 9001 facility.