NBS Clauses

M20 PLASTERED/ RENDERED/ ROUGHCAST COATINGS

10 CEMENT/ LIME/ SAND: RENDER:

CEMEX Mortars Lime:Sand Render & Ready to use (Cement: Lime: Sand) Render are designed for use as external renders. The lime: sand must be mixed with cement before use.To achieve the required strength of mortar, the correct mix of sand and lime must be specified.

Mortar designation 1 requires a 1:3 cement to premixed lime & sand mix (at 1:12 lime to sand proportions) to produce mix proportions of 1: ¼: 3. Mortar designation 2 requires a 1:4-4½ cement to premixed lime & sand mix (at 1:9 lime to sand proportions) to produce mix proportions of 1: ½: 4 to 4½ Mortar designation 3 requires a 1:5-6 cement to premixed lime & sand mix (at 1:6 lime to sand proportions) to produce mix proportions of 1: 1: 5 to 6 Mortar designation 4 requires a 1:8-9 cement to premixed lime & sand mix (at 1:4½ lime to sand proportions) to produce mix proportions of 1: 2: 8 to 9

When coloured render is used, only the final coat need contain pigment. The range of 13 colours available in 3 shades plus Natural gives 40 standard options. Non-standard colours can also be provided to order.

Consult CEMEX UK technical literature for details. CEMEX UK can also provide a technical and advisory service and it is recommended that they are consulted early in the design process, for more information contact us on 0800 667 827

NBS clause M20/10 is not wholly appropriate for the proprietary specification of CEMEX renders. Create an amended clause and insert the text below.

10A CEMENT/ LIME/ SAND: PROPRIETARY RENDER:

Substrate: - Insert details
Mortar:
Undercoats:
Mix (cement:lime:sand):
Mortar designation 1 (1:12 lime to sand ready-mix)
Mortar designation 2 (1:9 lime to sand ready-mix)
Mortar designation 3 (1:6 lime to sand ready-mix)
Mortar designation 4 (1:4½ lime to sand ready-mix)

Manufacturer: CEMEX UK Materials Ltd, CEMEX House, Rugby, Warwickshire, CV21 2DT.

Email: gb-enquiries@cemex.com
Web: www.cemex.co.uk/mortar

Proprietary reference: Readymix Lime:Sand Mortar
Final coat:
Mix (cement:lime:sand):
Mortar designation 1 (1:12 lime to sand ready-mix)
Mortar designation 2 (1:9 lime to sand ready-mix)
Mortar designation 3 (1:6 lime to sand ready-mix)
Mortar designation 4 (1:4½ lime to sand ready-mix)

Proprietary reference: Readymix Lime:Sand Mortar

Colour: Black / Dark Brown / Golden Brown / Light Brown / Lilac / Marigold / Mid Brown / Purple / Red / Red Brown / Terracotta / Tudor Brown / Yellow

Shade: Light / Medium / Dark

Natural: One shade only