Tierrafino Base

All substrates should be dry, pure, strong and free of dust and grease.
Tierrafino Base Clay Render is not suitable for use on permanently wet walls. In case of wet, moist walls it is necessary to create partition walls, using reed mats instead of plaster boards.
Interior application can be done directly onto substrates like brick walls, reed mats (mix straw into Tierrafino Base), chicken mesh or stucco-net.
As Tierrafino Base and clay finishes contain no glue, they set mechanically instead of chemically. For this reason it is necessary to create a coarse surface, i.e. a good mechanical key, on the wall to which the clay plaster will set.

Smooth substrates
Plasterboards, pre-fab concrete and paint should be treated with Tierrafino Contact, this is a primer containing quartz sands. Plasterboards: always stick joint tape onto joints and fill them with joint filler before applying Tierrafino Contact and Tierrafino Base.

Coarse substrates
Tierrafino Base is very suitable for flattening out inconsistencies in existing surfaces. Often this can be done using a single layer of Tierrafino Base, but it possible to apply more than one layer of Clayplaster. Depending on your wishes, you can apply each consecutive layer of Tierrafino Base at a thickness of approx. 10 mm to create new shapes in your home, like smooth curves in corners of walls, and from walls to ceiling.

Circumstances
The minimum temperature at which Tierrafino Base can be processed is 5ºC.

Storage
In 25kg polyethylene sacks, in a dry place.

Preparation of surfaces
Surfaces should be sound, dry and free of grease. Tierrafino Base relies solely on mechanical key for adhesion and this fact should always be borne in mind when choosing a background.
Apply Tierrafino Base as a plaster to blockwork, brickwork or reed mats. Smoother surfaces such as plasterboard and concrete should be prepared using Tierrafino Contact.

Coverage
Between 1.5 and 2 m² per 25kg bag

Application
Add contents of 25 kg bag of Tierrafino Base to 4 to 5 litres of water and mix to a workable consistency. The minimum temperature for application is 5°C. Apply in the normal way with a steel float.
First coat: approximately 10 mm, rough finish, for example with a tooth spatula
Second coat: approximately 10 mm, smoother finish. Now Tierrafino can be applied.
Once mixed Tierrafino Base will remain ‘live’ for days therefore for time can be saved by mixing up in bulk.

Repairs
As previously stated Tierrafino Base is a clay-based product which means it undergoes only a dehydration set. This means that it can be softened or brought back and re-worked at any time. This property is extremely useful when it comes to making repairs.

Tools
Normal plastering tools.

SPECIAL NOTE:
Tierrafino Base is a specialist plaster applied using techniques that differ slightly from those employed for conventional gypsum. Therefore it is essential these instructions are passed on to the applicator. Failure to do so could result in poor product performance for which Construction Resources cannot be held responsible.