Work Practice and Safety
Ensure you apply safe work practice. Clear the site of any debris and if working to heights ensure scaffolding and ladders are properly secured and erected properly.
For exterior surfaces it is very important to undertake repairs of any wall imperfections before commencing painting. The most common problem with exterior walls especially in older buildings is cracks in the walls. Fill "wide" cracks more than 4 mm with a 1:3 cement and sand mixture. All external drainage pipes must be checked for rusting or leakage. Any faulty plumbing must be rectified.
Special attention must be given to the roof. Check for cracks near the edges and close to the water reservoirs. Proper masonry or waterproofing work on the ceiling will enhance the performance of the painted surfaces.
- Newly plastered surfaces must be allowed to cure for at least 35 to 45 days before painting.
- To ensure long protection, the surface to be painted should be free from dust, grease and any loose materials.
- Remove any fungus and algae growth thoroughly by brushing it vigorously with wire brush and then cleaning it with bleaching powder solution in water (dissolve 10% bleaching powder in 1 litre of water, filter the solution and apply with a brush or sponge). This treatment should be done with greater care on the top of the awnings, sunshades, parapets and other horizontal surfaces where water is likely to accumulate during monsoon.
- Previously oil painted surfaces, should be sanded thoroughly to roughen up the surface and remove loose particles for better adhesion.
- Exterior rough surfaces that were previously coated, should be wire brushed, then washed down with water thoroughly and allowed to dry completely.
- Before painting, ensure that the surface is free from chalking.
- Remember the exterior surface should not be affected by water and constant dampness should be avoided. For best results avoid applying any kind of paint (acrylic or enamel) during high humidity or rain periods; allow the surface to dry out completely before re commencing painting.
A well presented exterior shows a wise owner. Safeguarding your investment in your building with ongoing paint maintance is common sense. Paint has the power to protect and keep exteriors looking better for longer.
- For traditional (three coat system - one undercoat followed by two fininsh coats if so apply APCO SUREPREP INTERIOR/EXTERIOR ACRYLIC SEALER UNDERCOAT. Then two coats of WEATHERBLOCK OR VILLA SUNFAST.
- Allow the recommended dry time between coats.
- It is recommended that horizontal surfaces like the tops of awnings and parapets must be given an additional coat for greater protection.