before applying dulux trade weathershield preservative primer
To get the best results, ensure surfaces to be painted are sound, clean and dry (new surfaces particularly must be fully dry).
Remove all loose and defective coatings, if necessary stripping back to bare wood. Special precautions should be taken during surface preparation of pre-1960s paint surfaces over wood and metal as they may contain harmful lead.
Remove and treat any mould, algae, lichen or moss with an appropraite Fungicidal Wash. Remove defective glazing material, clean the rebates and any loose or open joints. Replace any rotten wood and troublesome knots with new timber.
Thoroughly rub down all surfaces to remove any grey, weathered wood and su
rface sheen from remaining coatings, and then dust off (refer to your COSHH Assessment). Apply 1 or 2 coats of an appropriate knotting solution to any remaining knots. Fill any surface defects, open joints etc. with an appropriate filler and replace any missing glazing material with a suitable glazing compound.