100mm Cob Block Information

Specifications – 100mm Cob Block

Cob Block Dimensions

Cob Block Length – 385mm

Cob Block Depth – 215mm

Cob Block Height – 100mm

Cob Block Weights

Cob Block Manufacturing weight – 18.5kg

Cob Block Dry weight – 16kg

Cob Block (in-situ) Compression Strengths

Cob Block laid flat – 10t+ of spread load

Cob Block laid on edge – 1.8t of spread load

Coverage (per square metre – single skin wall)

Cob Blocks (laid flat) – 24 p/s/m (mortar required – 60kg)

Cob Blocks (laid on edge) – 12 p/s/m (mortar required – 25kg)

Cob Blocks – Packaging

Cob blocks per pallet – 52

Total (full pallet) weight – 700kg

Cob blocks are also sold individually

Cob Block point-of-use

Medium to large cob wall repairs

Cob wall rebuilds

New cob walling

Recommended binding mortars

Natural Hydraulic Lime (NHL2) + coarse sand (2.5 parts sand to 1 part NHL2 by volume)

Non-hydraulic lime (lime putty) + coarse sand (2.5 parts sand to 1 part lime by volume)

Sieved, clayey soil + water (consistency should be more wet than dry)

Preparation

Ensure that the accepting surfacing is moistened prior to a mortar bed being introduced. This can be achieved with either a low-pressure water sprayer or a soft bristled hand brush dipped in water and applied to the surfacing. NB These operations are not essential, however they will ‘buy the user some time’ to ensure the cob block is levelled accurately before the mortar starts to cure.

Specialist Skills

There are no specialist skills required to install these cob blocks. A general builder or a competent DIY’er can achieve effective results with relative ease.

Precautions

Cob blocks can be stored inside or outside. If stored outdoors – keep the cob blocks off of the ground and cover with a weatherproof sheeting – do not allow the cob blocks to become moisture/water saturated.

Do not drop these cob blocks. Whilst our cob blocks deliver high compression strengths within any given wall they have minimal tensile strength.

Handle with care.

Cob Block Prices (exc VAT and delivery)

Cob Blocks (each) – £2.90

Cob Blocks (100+) – £2.61

Cob Blocks (pallet of 52) – £150.80

Technical Information – Compression Strength

(100mm cob block – flat)

Compression strength was tested to 10t of spread load however this failed to compromise the integrity of the block. Therefore, and until we ascertain a failure point, the overall compressive strength is +

Loading = 10,000kg (22,046lb)

Area = 131.7″

PSI = 167.4 (11.77kg/cm2)

Density = 1610kg/m3

Compression Strength = 1.15N/mm2 +