Cook Group Ltd
Condensation Control Building Preservation Flood Remediation Structural Waterproofing

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Mortar Injection

Injection Mortar

A Pore Blocker system

 This is a similar principle to cream chemical injection (in as much that you drill holes and inject chemicals), suitable for treating thick stone walls where rising damp is largely carried by the mortar beds and rubble filling. Larger 20 mm holes are drilled at approximately 100 mm intervals and the damp-proofing agent is a pore-blocking chemical (insoluble salts) contained in a fine sand / cement mortar. The damp-proofing agent is carried into the porous mortar beds and rubble by the rising damp, where it crystallises to form an impermeable barrier to control subsequent water rise. The drilling is much more time-consuming and the materials more expensive than the liquid or cream chemical injection, but this type of system is much more effective for these types of stone walls. Mortar injection can also be used in conventional solid 225 mm or cavity 275 mm brick constructed walls.
The thickest wall we've injected with this type of system was over 1.2 metres thick! this was a 250 year old farmhouse in East Yorkshire.


The picture below shows the injection mortar being injected into a random stone wall

DPC installation using Injection mortar

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Delaminating stonework
The chalk stone in this picture had actually shed nearly 75mm of its face
Delaminating stonework

Water damage from defective gutters

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