Concrete and Lightweight Screeds
Concrete and lightweight screeds serve as the foundational layer for various structural surfaces, bridging the gap between a rough substrate and a finished top layer. These materials are engineered to provide leveling, slope, and structural integrity across three primary environments: interior floors, roofs or balconies, and exterior areas. Each application requires specific density and moisture-resistance properties to ensure long-term durability against foot traffic or environmental exposure.
The methods of preparing and applying these screeds vary significantly based on project scale, budget, and logistical constraints.
Primary Application Areas
Internal Floor Areas/Multi Level Basements"
Typically internal, these screeds focus on creating a perfectly level surface for tiles, wood, or carpet. They often need to accommodate underfloor heating systems or provide high compressive strength for foot traffic.
Roofs/Balconies
These require "lightweight" options to avoid overstressing the building's structural frame. A critical function here is creating a fall (a slight slope) to ensure rainwater flows toward drains rather than pooling.
Exterior Areas
These screeds must be durable enough to withstand thermal expansion, frost, and varying weather conditions. They are often used for patios, walkways, or parking decks.
Preparation and Mixing Methods
Micro Concrete
This is a high-performance, pre-bagged solution. Because the chemistry is precisely controlled at the factory, you only need to add water on-site.
- Key Advantage: It is the "speed king" of the group, with a drying time of just 3 days.
- Versatility: It can be applied as thin as 5mm if a bonding agent is used, making it ideal for repairs or leveling existing floors without significantly raising the floor height. Its portability makes it perfect for "difficult access areas" like high-rise apartments or tight crawlspaces.
Readymix Screed
This method involves ordering a large volume of pre-mixed material from a plant, which is then delivered by truck and delivered to the specific floor via a concrete pump and pipelines.
- Key Advantage: It offers the fastest application for large-scale projects (like warehouses or large commercial lobbies).
- Efficiency: It is highly economical for big jobs because it reduces manual labor; a pump can move massive amounts of material in a few hours that would take days to move by hand.
Site Mixed Screed
The traditional method of mixing raw sand, cement, and aggregate directly on the job site using a portable mixer.
- Key Advantage: It is the most economical option for smaller or residential jobs where the cost of a pump or specialized bagged products isn't justified.
- Problem Solver: This is the go-to "solution when no access for pumps or pipelines" exists. If a truck cannot get close to the building or if the site is in a remote area, site mixing allows the crew to work independently of heavy machinery.
