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CLASP CONSTRUCTION (Common Defects (Penetrating Damp through failed joints…
CLASP CONSTRUCTION
Common Defects
Penetrating Damp through failed joints
Poor U-Vales/ High Fabric Heat Loss
Excessive Solar Heat Gain
Poor thermal response
Interstitial and Surface Condensation
Poor Comfort Levels
Steel packers at base of columns not having anti carbonation coating
Poor gaskets around windows
Pitch fibre drains - root ingress / movement
Water ingress at concrete panels to frame
No DPM
Poor compartmenation
CONSTRUCTION
LIGHTWEIGHT STEEL FRAME
SHORT SPANS
CROSS BRACING
IN SITU - CONCRETE SLAB
ACTS AS DIAPHRAM
POOR INSULATION
LIGHTWIEIGHT EXTERNAL CLADDING
TYPES
MARK 3
MARK 4
MARK 5
PROBLEMS
ALTERATIONS
INFLEXIBLE GRID - STEEL COLUMNS AND BRACING INHIBIT
DIAGPHRAM SLAB PREVENTS SIGNFICANT DRAINAGE ALTERATIONS
DIFFICULT TO SATISFY INSULATION AND ACOUSTICS
ASBESTOS
LINING OF STEEL
ROOFING FELT
DRAINAGE
CEILING
LAGGING
CISTERNS
STUCTURAL ISSUES
STRUCTURAL
INTEGRITY RELIES
ON DIAPHRAGM
UNREALISTIC TO REMOVE COLUMNS
Overview
CONSORTIUM OF LOCAL AUTHORITIES SPECIAL PROGRAMME
SET UP IN 1950s TO SATISFY POST WAR POPULATION
NOW SCAPE
60 YEAR DESIGN LIFE