Term: Screed
Screed boards and screed rails
– A screed board is a flat board or aluminum tool used to smooth and true materials like concrete, stucco, and plaster.
– It is used to assist in flattening surfaces after the materials have been placed.
– Screed boards are commonly used in building construction.
– They help achieve a smooth and level finish on the applied materials.
– Screed boards can be made of various materials, including wood and aluminum.
– Screed rails are strips of plaster or wood applied to a surface to act as a guide for a screed tool.
– They help maintain the desired thickness and level of the screed.
– Screed rails are commonly used in concrete finishing processes.
– They ensure the proper grade and smoothness of the top surface of a slab.
– In asphalt paving, screed rails are part of a machine that spreads the paving material.
Liquid and flow screeds
– Flowing screeds are made from inert fillers such as sand, with a binder system based on cement or calcium sulphate.
– They are easier and faster to install compared to traditional screeds.
– Flow screeds provide a similar finish and are often used in combination with underfloor heating installation.
– Liquid flow screed is self-leveling and does not require vibration for bubble removal.
– It minimizes heat storage, making it more efficient for underfloor heating.
Screed coats
– Screed coats refer to a thin top layer of material poured on top of structural concrete or insulation.
– They can be made of sand and cement, magnesite, or calcium sulphate.
– Screed coats provide a base for other finishing materials or can be left bare for a raw effect.
– The delivery, mixing, and pumping of screed can now be done from a single vehicle.
– This advancement in technology has made screed jobs more efficient and convenient.
Related terms and resources
– Screed wire is an alternate name for a ground wire in electrical work.
– Additional references and resources can be found in the Construction Dictionary.
– The Oxford English Dictionary provides definitions for the term ‘screed.’
– ‘Barrys Introduction to Construction of Buildings’ is a book that covers various construction topics.
– Weep screeds are used in exterior plaster or stucco coatings to allow moisture drainage.
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Screed has three meanings in building construction:
- A flat board (screed board, floating screed) or a purpose-made aluminium tool used to smooth and to "true" materials like concrete, stucco and plaster after they have been placed on a surface or to assist in flattening;
- A strip of plaster or wood applied to a surface to act as a guide for a screed tool (screed rail, screed strip, screed batten);
- The material itself which has been flattened with a screed (screed coat). In the UK, screed has also come to describe a thin, top layer of material (sand and cement, magnesite or calcium sulphate), poured in situ on top of the structural concrete or insulation, on top of which other finishing materials can be applied, or the structural material can be left bare to achieve a raw effect.
