NLAC (NanoPORE™ Advanced Lightweight Aerated Concrete) floor screeds are not merely a leveling layer; they are a multi-functional, high-performance building system. They are specifically engineered to serve as a compensation and filling layer prior to the installation of final floor finishes like tiles, marble, wood, or vinyl, while providing significant added benefits in sound insulation and thermal comfort.

1. The Primary Function: A Perfect Compensation and Leveling Layer
   • The Challenge: Traditional sand-cement screeds are heavy and can be difficult to work with, especially when levelling large areas or filling deep variations in the structural slab. They are prone to shrinkage cracks and require precise manual levelling.
   • The NLAC Solution:

• Self-Levelling & Highly Flowable: NLAC is poured or pumped onto the floor, where it flows effortlessly to find its own level. This creates a perfectly flat, monolithic surface without the need for strenuous manual grading, eliminating human error and ensuring an ideal substrate for sensitive finishes like large-format tiles.
• Compensates for Irregularities: It easily fills in dips, voids, and undulations in the structural concrete slab, creating a uniform base that prevents hollow spots and ensures full support for the final flooring.

2. The Decisive Advantage: Superior Sound Insulation
   • The Problem with Traditional Screeds: Standard dense screeds do little to block sound transmission. Impact noise (footsteps, dropped objects) and airborne noise easily travel through them, a major issue in multi-story residential and commercial buildings.
   • How NLAC Solves It: The secret lies in its cellular structure. The millions of trapped air bubbles act as acoustic dampeners.

• Impact Sound Insulation: NLAC effectively absorbs and dampens impact energy, significantly reducing the transmission of footsteps and other impact sounds to the rooms below. This leads to higher acoustic privacy and comfort, often helping buildings meet stringent building code requirements for sound transmission.
• Airborne Sound Insulation: It also provides a notable reduction in airborne noise (like conversations, TV sounds), creating a more peaceful interior environment.

3. The Critical Benefit: Lightweight Compensation
   • Why Weight Matters: Adding a heavy traditional screed can consume a significant portion of the building’s design load, limiting architectural freedom and increasing the cost of the structural frame.
   • The NLAC Advantage: With a density typically one-third to one-half that of traditional screed, NLAC drastically reduces the dead load on the floor slab. This is known as “lightweight compensation.” It allows for the creation of a thick, leveling, and insulating layer without overburdening the structure, which is particularly crucial in high-rise buildings and structural retrofits.

4. Additional Performance Benefits

• Excellent Thermal Insulation: The same air-filled cells that provide sound insulation also offer remarkable thermal resistance. An NLAC screed contributes to the building’s energy efficiency by reducing heat loss through the floor, keeping rooms warmer in winter and cooler in summer.
• Rapid Installation and Curing: The pumpable application is much faster than mixing, transporting, and laying traditional screed by hand. This accelerates project timelines. It also typically has lower drying shrinkage, reducing the risk of cracks.
• Fire Resistance: As a cement-based material, it contributes to the overall fire rating of the floor assembly.