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FLOOR COVERINGS

NGfL CYMRU GCaD


The floor coverings discussed in this presentation relate only to commercial buildings.

FLOOR COVERINGS

NGfL CYMRU GCaD


Floor coverings can be considered to be of either an applied, in-situ or timber finish.

Applied finishes are derived from products such as:-

- Quarry or ceramic tiles.

- Linoleum.

- Carpet, whether on a roll or in tile form.

- Paint.

In-situ finishes are formed during construction. Examples are concrete floors commonly found in industrial warehouses.

Timber floors can be made from timber blocks, boards or sheet.

FLOOR COVERINGS

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Quarry tiles are square in shape, and are manufactured from clay. They are impervious to water and spillage and are hard wearing.

FLOOR COVERINGS

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Threshold strips are used to cover the interface between different floor coverings. The strip shown above is made from aluminium. The white coloured material between the tiles is known as grout.

FLOOR COVERINGS

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Top image: quarry tiles being laid during the construction of a new building.

After being laid, the tiles are protected from damage as shown in the bottom image.

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Ceramic tiles are manufactured from limestone, and are fired twice during the manufacturing process. The first firing forms the tile, and the second forms the tile’s surface to provide a finish.

The next slide shows ceramic tiles being laid.

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1

3

2

1) Adhesive spread on concrete floor.

2) Tile positioned in adhesive.

3) Excess adhesive wiped off

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Linoleum can be applied in either tile or sheet form.

Non-slip linoleum is suitable for areas such as shower rooms, service corridors, kitchens etc.

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In wet areas, such as showers or commercial kitchens, an upstand turns up vertically against a wall. The upstand prevents water from getting underneath, or behind the linoleum.

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Where large areas of linoleum are laid, joints between sheets are heat welded together to form one continuous piece of linoleum.

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Skirting boards can be sealed to provide a finish at the interface of linoleum and walls.

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To cover areas such as stairs, strips of linoleum are cut to shape as shown right.

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Stair nosings (left) cover the edge of stair treads, and edge trims (right) cover the sides (known as the string). Stair nosings are of a different colour to that of the stair covering.

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Right: powder coated stair nosings fitted to a staircase with quarry tiles.

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www.ngfl-cymru.org.ukAbove: carpet tiles fitted in a modern office building

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Carpet tiles being laid on a raised floor. A water-based tackifier compound is laid on the raised floor 20 minutes before the carpet tiles are fitted. This does not adhere the tiles to the base, but will provide enough tack for the tiles stay in place.

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Once new carpets are laid, they are sometimes covered for protection until the building is handed over to the owners. The above image shows recently-laid carpet tiles in a University building, a few weeks before handover.

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Different coloured carpet tiles can be used to form walkways and access routes.

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www.ngfl-cymru.org.ukLecture theatre being prepared for laying of carpet tiles.

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www.ngfl-cymru.org.ukStair nosing being installed

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Carpet tiles laid around ventilation

ducts

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Adhesive is used to fix carpet

tiles.

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The carpet tile is then cut to the required size.

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www.ngfl-cymru.org.uk Nosings are then fitted to the intersection of the step (going)

and the riser.

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www.ngfl-cymru.org.ukCarpet tile fitting in a lecture theatre nearing completion.

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IN-SITU FINISHES

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www.ngfl-cymru.org.ukComposite steel and concrete floors are widely used.

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Steel decking is fixed to a structural frame.

Steel mesh is laid on the steel deck.

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Fresh concrete is placed around the mesh. The concrete is compacted to form a continuous structure.

Concrete compaction ensures that any air in the concrete is removed, and that the concrete attains full strength.

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Once the concrete begins to harden (known as curing) a machine called a power float is used to smooth the surface of the concrete.

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www.ngfl-cymru.org.ukConcrete floor after power floating

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Additives can be introduced into concrete to provide increased hardness to the surface. This technique is frequently used in factories and warehouses.

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Specialist paint can be used on concrete to mark walkways, safe areas around machinery and storage areas.

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Floor screed can also be used as a floor covering: a mixture of water, sand and cement forms screed – also known as ‘semi-dry.’ The minimum thickness required is 50mm.

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TIMBER FINISHES

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Areas such as mezzanine floors can be covered with medium density fibreboard.

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Other areas can be covered with timber floor boards, which are fitted to joists.

FLOOR COVERINGS