House Wash
5 Litre
$49.99
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House Wash
$49.99
Trade Chem House Wash is a professional exterior cleaner formulated to remove dirt, mould, mildew, and everyday grime from exterior surfaces. Its fast acting formula is suitable for use with sprayers, soft wash systems, or brushes, leaving homes and buildings clean and refreshed. Ideal for residential, commercial, and industrial exterior cleaning.
IMPORTANT: We’ve provided the necessary instructions and precautions on the label to help ensure safe and correct use. It is the user’s responsibility to read and follow these instructions. As we have no control over how, where, or under what conditions the product is used, we cannot guarantee results and accept no liability for injury, loss, or damage arising from its use or misuse.
Strength Level
Professional Grade
pH: 11.0
Chemical Type
Water Based Exterior Cleaner
Best For
House washing, exterior building cleaning, mould and mildew removal, dirt and grime removal, fences, gutters, and cladding.
Avoid On
Unsealed timber, delicate plants, and surfaces not suitable for alkaline cleaners. Avoid allowing the product to dry on the surface. Test before use.
Surface Safe
Painted weatherboards, brick, concrete, fibre cement, vinyl cladding, gutters, fences, and exterior building surfaces. Test before use.
Application Method
Use on its own or as the surfactant in a soft wash mix with sodium hypochlorite. Apply with a sprayer, soft wash system, or brush, leave 10 minutes without letting it dry, then rinse thoroughly with clean water.
Dilution Rates
House Wash on its own: Dilute up to 1:40. Spray the whole exterior top to bottom, leave 10 minutes, then pressure hose off. For heavier soiling, use a stronger ratio.
Soft Wash Mix (with 12 to 15% sodium hypochlorite), per 10L sprayer:
- Light (1%): 650mL sodium hypochlorite + 100mL House Wash + 9.25L water
- Medium (2%): 1.3L sodium hypochlorite + 100mL House Wash + 8.6L water
- Heavy moss and lichen (3%): 2L sodium hypochlorite + 150mL House Wash + 7.85L water
Pre-wet plants and gardens, apply low pressure, then rinse plants afterwards. Mix fresh on the day. Do not mix with acids or quat based products.
Use our interactive Dilution Calculator →
Work out how much you need with our Surface Area Calculator →