Start with the condition rather than a product name. This is an initial information framework and does not replace site inspection or structural/technical diagnosis.
Locate the likely moisture path, identify the affected area and substrate, then review the appropriate waterproofing system and exact manufacturer instructions.
Investigate moisture source and salts before recoating. A decorative coating alone may not correct an underlying moisture source.
Check moisture, surface contamination, loose coating, preparation and compatibility before selecting a replacement system.
Determine whether the issue is cosmetic, substrate-related or a movement/joint condition before choosing a repair or waterproofing system.
Consider exposure, substrate, surface preparation and the manufacturer's recommended exterior system.
Assess corrosion and preparation, then choose a compatible primer/topcoat system from the relevant manufacturer.
Assess wood condition and desired finish, then use the appropriate wood-coating system and exact application instructions.
Plan the complete coating sequence from substrate preparation through primer and finish, using the selected manufacturer's system.