8/3/2019 Garratts Damp and Timber Identifying Types of Damp[1]

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Garratts Damp & Timber Ltd..

Identifying Damp in the Home

Damp Category Signs/Symptoms Cause Remedial Work

Rising Damp Dampness and/or staining ofinternal and external walls,usually at ground level and up toapprox 1 metre.

Skirting board decay

Rusty nails in the skirting

Wetrot to subfloor timbers i.e.joists, wall plates etc.

Damage to plasterwork, flaking,blistering etc

Salt deposits usually at groundlevel and up to approx 1 metre.

Missing physical damp proofcourse (DPC)

Decayed physical damp proofcourse (DPC)

The physical damp proof course(DPC) is lower than thesurrounding groundwork

The physical DPC may also bebridged by extensions or otherforms of abutted wall, fencepillars etc.

may require:

Injection of chemical damp course to overcome missingphysical course (frequent)

Removal & replacement of sboards (frequent)

Removal of plaster, sealingbrickwork and subsequentreplacement of render andfinished plaster (frequent)

Replacement of rotting floortimbers (occasional)

Penetrating Damp Dampness and/or staining ofinternal and external walls, can bepresent at any height and can

propagate to ceilings

Damage to plasterwork, flaking,blistering etc

Salt deposits on walls

Timber decay

Loss of integrity to externalbuilding construction;

Defective roofing

Cracked render/brickwork

Decayed windows/doors

Defective guttering

General external buildingmaintenance required (alwa

Removal of plaster, sealingbrickwork and subsequentreplacement of render andfinished plaster (frequent)

Removal & replacement of sboards (occasional)

Replacement of rotting sub timbers (occasional)

Lateral Penetrating Damp Dampness and/or staining ofinternal and external walls, can bepresent at any height and can

propagate to ceilings

Damage to plasterwork, flaking,blistering etc

Salt deposits on walls

Timber decay

Missing physical damp proofcourse (DPC)

Decayed physical damp proofcourse (DPC)

Raised soil levels or otherbuilding works adjacent toexternal wall

Removal of high external solevels where practical (occa

Removal of plaster and theinstallation of a tanking sys(frequent)

Removal & replacement of sboards (frequent)

Replacement of rotting timb(occasional)

Condensation Staining to interior dcor

Black mould

Musty odour

Wetness on interior dcor,windows/sills

Inadequate ventilation and aircirculation

High moisture content in airwithin home (kitchens,

bathrooms etc.)

High temperature fluctuations

Installation of additional suboiler room air bricks (fairlyfrequent)

Installation of high level air

Installation of ventilation syie humidity controlled electrvents (fairly frequent)

Installation of positive presssystem

Garratts Damp & Timber Ltd.

0208-535-753601923-260510 01923-260520

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