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INTERNATIONAL STANDARD ISO 14644-4 First edition2001-04-01
E.1.4 Internal finishes,durabilityandmaintainabilityIn the completedinstallation,all internal
surfaces shouldbe finishedsuitablysmooth,non-porous and free from cracks, cavities,stepsand
ledges.The designand construction shouldbe such that the number of steps,ledges,cavitiesand
similarfeatureswhere contaminationcould collectis minimized.The numberof corners should
also be kept to a minimum,particularly internal corners. Cornersand junctionsmay be radiused,
especiallyat floor-to-wall andwall-to-wall junctions,sothat effective cleaning isfacilitated.The
finishshouldbe compatible withthe mechanical and chemical effectsofthe intendedmethodsof
cleaningand disinfection.Materialsusedfor internal finishesshouldbe maintainedto ensure that
they consistentlyretainthe performance qualitiesconsistentwiththe cleanlinessclassofthe
installation.This may require regular maintenance proceduresand repairs. Considerationof
maintenance and repair methodsand disruptionimpact shouldform part of the material selection
criteria. Full lifecycle costand contamination risk analysisprocedures shouldbe considered.

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International Standard ISO 14644-4-E1.4

  • 1. INTERNATIONAL STANDARD ISO 14644-4 First edition2001-04-01 E.1.4 Internal finishes,durabilityandmaintainabilityIn the completedinstallation,all internal surfaces shouldbe finishedsuitablysmooth,non-porous and free from cracks, cavities,stepsand ledges.The designand construction shouldbe such that the number of steps,ledges,cavitiesand similarfeatureswhere contaminationcould collectis minimized.The numberof corners should also be kept to a minimum,particularly internal corners. Cornersand junctionsmay be radiused, especiallyat floor-to-wall andwall-to-wall junctions,sothat effective cleaning isfacilitated.The finishshouldbe compatible withthe mechanical and chemical effectsofthe intendedmethodsof cleaningand disinfection.Materialsusedfor internal finishesshouldbe maintainedto ensure that they consistentlyretainthe performance qualitiesconsistentwiththe cleanlinessclassofthe installation.This may require regular maintenance proceduresand repairs. Considerationof maintenance and repair methodsand disruptionimpact shouldform part of the material selection criteria. Full lifecycle costand contamination risk analysisprocedures shouldbe considered.