Terrazzo installation instructions 

Terrazzo flooring instructions 

Terrazzo installation instructions 

For approx. 12- 15 mm thick In Cement Terrazzo Floor

Preparation of the mother Floor

1. Check the mother slab and see that there are no pot holes, cracks or any other defects , if any found,

proper repair work is required before proceeding further.

2. Check and ensure proper levels of the entire floor.

Preparation of the Under layer and placing of divider strips:

1. The base shall be cleaned of all dust, dirt, laitance and any loose materials. It shall be then wetted with

water, and smeared with cement slurry at 2.75 Kg/sq. mt. before application of under layer screed.

2. Under Layer- The under layer shall be made of a Controlled Shrinkage Screed. Controlled Shrinkage

Screed with clean aggregates of 0-8 mm size mix with Cement at a ratio of 3 parts of aggregate and 1

part of Cement. This is added to water to obtain a mix with “damp earth” consistency, without water

bleed under a float/trowel finish.

3. Otherwise (if the under layer is laid as a bonded screed), a minimum average thickness of around 45

mm should be maintained for the under layer, and in no place should the thickness be less than 30

mm.

4. Under layer shall be spread and leveled with a screeding board. The top surface of the under layer

shall be left rough to provide a good bond to the terrazzo. The application of the Controlled shrinkage

Screed must be carried out as per the instruction of the screed manufacturer.

5. Dividing Strips: The base shall be divided into panels with the help of dividing strips including the

strips required for decorative design up to the finished surface level of the floor. This can be done in

one of the two ways. a.. The divider strips are to be laid along with the under layer. The divider strips

can be fixed in the under layer concrete screed while exposing approx 12mm of the strips to receive the

terrazzo topping. b. On previously hardened concrete, divider strips especially in “L” or similar shapes

can be glued or fastened to later receive the terrazzo topping. In case of option b. the concrete bed

must be adequately cured before receiving the terrazzo topping.

Terrazzo topping

Terrazzo matrix of approved colour and stone chips and a minimum of 12-15 mm thickness of the Terrazzo

Topping Matrix will be required.

Mixing Materials

1. With a view to avoid variation in colour, mixing shall be done in trough or tub. The available Terrazzo

Matrix is to be mixed with water only. Only so much quantity of the matrix should be wetted as can be

used up within 1 hour of the wetting. Re-adding of water to the mix on drying must be avoidedhe mother slab and see that there are no pot holes, cracks or any other defects , if any found,