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Roof Maintenance Tips

Roofs may be classified as flat roofs (less than 10 degrees slope) or pitch roofs. Although some roof systems require less maintenance than others, all roof systems should be checked periodically to ensure that they are free of debris and that the drainpipes are clear.

Proper maintenance is a key element in prolonging the service life of the roof. This section provides some general guidelines to help keep pitch roofs in good working condition for as long as possible.

Defects Likely Causes Repair and Maintenance Tips
Leaks due to cracked, loose clay tiles on pitch roof
  • Mechanical damage due to objects dropped on tile surface
  • Improper installation of tiles onto roof
  • Tiles dislodged by strong winds
  • Corroded wire used to tie tiles to battens
  • Conduct regular inspection
  • Replace damaged or loose tiles
Stained clay tiles on pitch roof
  • Growth of algae
  • Engage specialist to jet wash the roof surface
  • Spray anti-fungal solution on roof surface
Rotting supporting timber rafters, purlins or battens
  • Termite-infestation
  • Decay of timber in contact with damp brickwork
  • Remove and replace all affected timber units
  • Apply anti-termite treatment under base slab
  • Apply anti-termite treatment to wood
  • Use properly seasoned wood
  • Apply remedial treatment to wood, eg. drying out, application of wood preservatives
Leaks at roof gutter
  • Choked roof gutter due to fallen leaves and branches
  • Undersized or blocked rainwater outlet
  • Cracked gutter due to wear and tear
  • Insufficient fall in gutter
  • Cover gutter with appropriately sized wire mesh
  • Regular inspection of gutters and gutter supports, once a week, especially if there are trees in the vicinity, to clear away leaves which prevent water from draining away
  • Remove debris from all gutters
  • Check that drainpipes are draining properly by water testing them
  • Paint roof gutters with insecticide paint to prevent mosquito breeding
Rusting and corrosion in ferrous metal roofing (especially in profiled steel sheeting used to line soffit of projecting eaves and underside of projecting canopies)
  • Local tropical conditions of constant high humidity and heavy rainfall
  • Deposits of wind-borne salts and atmospheric sulphur particles and other pollutants
  • Apply protective metallic coatings or paints to steel sheeting
  • Consult specialist for repairs
Ponding in sheet metal roofing
  • Inappropriate gradient (fall) of roofing profile, preventing speedy drainage of rainwater to gutter and rainwater drainpipes
  • Ensure appropriate gradient in metal roofing, according to system selected
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