Armolite 1000
Lightweight Cement Based Screed
ARMOLITE 1000 is a pre-blended, lightweight, cement-based screed mortar designed for weight reduction and thermal insulation on floors and roofs. It provides a monolithic topping when applied to floors and is ideal for leveling rough surfaces, forming drainage falls, and casting decorative profiles. While not intended for high-wear or impact-resistant applications, it is suitable for internal and external foot-traffic areas. On roofs, it can be laid to falls and topped with membranes or waterproof coatings. ARMOLITE 1000 is highly recommended where weight restrictions apply.
Technical data:
- Appearance : cement grey powder
- Setting time : approx. 12-48 hours
- Open to foot traffic : 24 hours
- To receive tiling : 7 days
- Coverage : 1 m² at 30 mm thickness for 1 bag
- Packaging : 25 kg bag
How to Apply Armolite 1000
Armolite 1000 is laid in bays over a saturated surface dry or primed substrate, then leveled, falled and wet-cured.
- Prepare the substrate. Surfaces should be sound, clean, dry and free from loose material, efflorescence, laitance, curing compounds, dirt, oil and grease, and concrete floors should be cured for at least 14 days. Respect movement joints in the main structure and divide the area into bays using wood or steel guides fixed to the required level.
- Dampen or prime. Bring the substrate to a saturated surface dry (SSD) condition with clean water. On highly porous surfaces, apply a rich coat of Armoprime AC at 6–8 m² per liter depending on porosity; on weak surfaces, a coat of cement slurry is recommended as a bonding layer.
- Mix. Pour 5.75 liters of water per 25 kg bag into a suitable container, preferably wide and shallow, then add the powder. Mix with a low-speed drill and paddle for a minimum of 3 minutes, let the mix stand for 4 minutes and re-stir before use. Do not add sand or cement.
- Place and level. Empty the mixed screed onto the substrate and spread it evenly with a flat steel or wooden float, mixing enough to cover the area and avoid multiple casting. Keep the screed thickness at not less than 30 mm, and level or form falls with a steel or timber straight edge.
- Cure. Avoid rapid evaporation: cover the screed with plastic sheet fixed over wet hessian for 3 days, or apply a suitable curing compound. In summer, cover the working area to prevent direct sun effects.
- Apply finishes. Floor coverings or waterproofing membranes can be applied after 7 days of casting.
Summary of the method in the Armolite 1000 Technical Data Sheet. Always follow the full TDS on site.
Standards & Test Methods
| Standard | Title | Referenced for |
|---|
| ASTM C109 | Standard Test Method for Compressive Strength of Hydraulic Cement Mortars (Using 2-in. or [50 mm] Cube Specimens) | Compressive strength |
Standards and test methods as referenced in the Armolite 1000 Technical Data Sheet. Values in the TDS are typical laboratory results under standard conditions.
Frequently Asked Questions
What thickness can Armolite 1000 lightweight screed be laid at?
Armolite 1000 is applicable in thicknesses from 20 mm to 200 mm. The application instructions state the screed thickness should not be less than 30 mm.
What is the coverage of Armolite 1000?
One 25 kg bag of Armolite 1000 covers approximately 1 m² at 30 mm thickness. Coverage is approximate and subject to site conditions.
When can Armolite 1000 be tiled or waterproofed?
Floor coverings or waterproofing membranes can be applied after 7 days of casting. Setting time is approximately 12–48 hours.
Can Armolite 1000 be used on roofs?
Yes. On roofs it can be laid to falls to create a rain slope and is generally topped with membranes or waterproof coatings. It should not be used where negative hydrostatic pressure such as rising damp is present, or in water-immersed areas like swimming pools or fountains.
How light is Armolite 1000 compared with normal screed?
Armolite 1000 is less than half the weight of normal screed, with an air-dried density of 1000 and a compressive strength of 9.0 N/mm² (ASTM C109). It also has a thermal conductivity of 0.08–0.09 W/m°C.
