As a general rule cement:lime:sand mortars give a stronger bond than plasticised mortars of a similiar compressive strength.

Mortar designation (iii) is the strongest that should be used with traditional blockwork above DPC level and is generally suitable, provided structural considerations do not demand a stronger mix and the masonary is protected during construction from saturating and freezing.

Below DPC level, mortars of designation (ii) (1:1/2:4 cement:lime:sand) particularly where there is a risk of freeze/thaw, or (iii) may be used, according to soil conditions.

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For more information please call 01732 886444 or email info@hhcelcon.co.uk.