RELATED MATERIALS
AQUAMAT-ELASTIC – two-component, elastic waterproofing slurry
DUROCRET – polymer-modified cement mortar
RAPICRET – fast-setting patching mortar
ADIPLAST – polymer latex for multiple improvements of mortars
POLYESTER CLOTH FOR WATERPROOFING LAYERS – polyester cloth, 100 cm wide, for reinforcing waterproofing layers
FIBERGLASS MESH – fiberglass mesh for reinforcing waterproofing layers
I. NATURE OF THE PROBLEM – REQUIREMENTS
Waterproofing of terraces, whether carried out during construction of the building or later on, must be absolutely watertight, reliable, resistant to adverse weather conditions and long lasting. It must display elasticity and efficient bonding to the substrate.
II. SOLUTION
The application of AQUAMAT-ELASTIC, elastic cement-based brushable sealing slurry, reinforced overall with sheets of fibreglass mesh or polyester cloth, 100 cm wide, covers all the above requirements. Its application on terraces creates a strong and continuous elastic waterproof coating with excellent bonding and durability, able to follow expansion and contraction of the terrace. It is an ideal solution whenever waterproofing is combined with the fixing of ceramic tiles as a final coat.
III. APPLICATION
Substrate preparation
1. Surfaces should be thoroughly cleaned from any loose particles, grease, dust etc.
2. Any necessary repairs or alterations to the gradient are carried out using a strong cement mortar (cement:sand = 1:2 to 1:3), reinforced by the addition of ADIPLAST polymer latex. It is recommended that bonding of the cement mortar to the substrate is reinforced by applying a bonding layer to which ADIPLAST is also added (cement : sand : ADIPLAST : water = 1 : 1 : 0.5 : 0.5 by volume).
3. The intersection of the terrace with vertical structures (parapet, stairwell termination) should be dampened and sealed along its length using DUROCRET polymer-modified cement mortar or a cement mortar reinforced with ADIPLAST polymer latex, forming a 5–6 cm triangular groove. Where fast work is required, RAPICRET fast-setting patching mortar may be used instead.
4. Thoroughly dampen the substrate without leaving water puddles.
Application of waterproofing
1. The content of the 25 kg bag (component A) of AQUAMAT‑ELASTIC is added into the 10 kg of liquid (component B) under continuous stirring until a uniform viscous mixture is formed. A low‑revolution mixer (300 rpm) may be used.
2. A layer of AQUAMAT‑ELASTIC is applied, as wide as the reinforcing material (fibreglass mesh or polyester cloth). While the slurry is still fresh, lay the reinforcement sheet over it. The procedure is repeated over the remaining surface. The sheets of reinforcement should overlap each other by 5–10 cm.
3. After the first layer dries, two more coats of AQUAMAT‑ELASTIC are applied over the entire surface, letting each layer dry before applying the next. The thickness of each coat should not exceed 1 mm to avoid cracking. Extend the waterproofing at least 15‑20 cm up any vertical surfaces to form a watertight basin.
AQUAMAT‑ELASTIC consumption is about 3.5 kg/m².
Covering of the waterproofing
The final surface can be covered with ceramic tiles, paving slabs or terrazzo, or with a 6–8 cm thick layer of gravel. In the latter case, it is recommended to place a geotextile between the waterproofing and the gravel layer, to protect the waterproofing from “injuring”.
IV. REMARKS
• Temperature during application should be at least +5 °C.
• Protect the freshly applied waterproofing from high temperatures, rain and frost.
• Where the waterproofing is intended to be the final coating of the surface, use white AQUAMAT‑ELASTIC for the last layer to reduce absorption of heat from the sun’s rays and extend the life of the waterproofing.
• Consult the instructions for safe use and precautions written on the product packaging.