CES Building & Plastering Mortar

Lightweight Insulation Block

Building Mortar

CES Building Mortar is dispensed from mortar silos located at our Moneyreagh, Ballynhinch, and Saintfield works.
A quick turn around in the yard is assured. Collections can be made without prior notice. ½ tubs are available.

The building mortar is a prescribed general purpose 1:6 mortar suitable for internal and external use in block work, subject to structural requirements. It is a blend of specially graded kiln dried sands, cement, air entraining agents and clean water. It is suitable for building block, bedding & pointing brick and stonework.
The building mortar is manufactured to BS5268-3 type 111 mortar, BS EN 998-2 M4 prescribed.

Building Mortar Directions For Use

The mortar contains all components necessary for a general purpose building mortar. The mortar should be stored in a suitable non-porous container (mortar tub) and if covered will remain usable for 12 hours. Do not add extra water or attempt to rework mortar which has passed its working life. Excessive water addition will weaken the mix, delay setting time and adversely affect durability. Do not add further admixtures, cement or lime to the mortar. All the required plasticisers are already incorporated into the mix.

All work should be carried out to current best practice and to relevant national standards. Apply the mortar by trowel with a typical joint width of 10mm. In the case of high absorbency masonry units and/or high ambient temperatures, rapid moisture loss from the mortar can be reduced by pre-wetting the masonry units. Suitable protection is desirable to protect newly erected masonry against extremes of the weather, both in winter and summer.  Exposure to extreme conditions can affect both the appearance and the integrity of the mortar. To reduce damage to the finished mortar from frost and rain cover with polythene or hessian sheeting. To prevent rapid drying in excessively dry or windy conditions the mortar should be similarly protected. If the mortar is permitted to dry, before it has cured in the joints, the integrity of the construction will be at risk. Building with wet block/brick or in cold conditions will further retard the setting of the mortar. Always check the mortar used in the previous day’s building work has set before adding further courses.

Site and masonry temperatures must be between 5⁰C and 35⁰C during building and until the mortar has achieved sufficient strength to prevent damage. Efflorescence and limebloom are a natural phenomenon affecting all cement based products and while unsightly, in no way affects the performance of the mortar. CES accept no responsibility for the occurrence of efflorescence or limebloom and building mortar is sold on the understanding that this is a natural phenomenon when using cementitious products.