09 · siteworks trades # House washing, roof cleaning and moss treatment in Auckland ## Summary **House washing, roof cleaning and moss treatment** (Siteworks trades). House and roof washing, moss and algae treatment. House washing is not licensed. Ask what chemicals and pressure they use, how runoff is controlled, and whether they will damage cladding or roofing warranties. No listings yet: free listings are open. ## What house washing, roof cleaning and moss treatment do These contractors wash exteriors, treat moss and algae and clean roofs, decks and driveways. **You usually need them for:** Maintenance of a house exterior, before painting, or when moss threatens a roof. ## Where they fit in a new build or renovation Typical project stages where this trade is on site: 1. **Completion and maintenance** 2. **Outdoors and landscaping** Usually needed for: [decks & outdoor](/projects/decks-outdoor/). Stages are indicative. Your builder or project manager sets the real sequence. ## Check before you hire House washing is not licensed. Ask what chemicals and pressure they use, how runoff is controlled, and whether they will damage cladding or roofing warranties. ### Official links * [Consumer Protection (MBIE)](https://www.consumerprotection.govt.nz/) ### Questions to ask * What products do you use and where does the wash water go? * Are you insured and how do you work safely at height? * Is the treatment guaranteed? Checked against the official sites on 3 Nov 2026. General information only, not legal advice. ## House washing, roof cleaning and moss treatment in Auckland ### We're adding house washing, roof cleaning and moss treatment soon — are you one? Get a free listing: it takes a couple of minutes, and homeowners comparing house washing, roof cleaning and moss treatment in Auckland will find you here. [Get a free listing](/for-trades/?trade=house-washing-moss#claim) No house washing, roof cleaning and moss treatment listings yet, so this page is hidden from search engines until the first listing goes live. ## Frequently asked questions What do house washing, roof cleaning and moss treatment do? These contractors wash exteriors, treat moss and algae and clean roofs, decks and driveways. When do I need a house washing and roof cleaning contractor? Maintenance of a house exterior, before painting, or when moss threatens a roof. How do I check a house washing and roof cleaning contractor? House washing is not licensed. Ask what chemicals and pressure they use, how runoff is controlled, and whether they will damage cladding or roofing warranties. What should I ask a house washing and roof cleaning contractor before hiring? 1. What products do you use and where does the wash water go? 2. Are you insured and how do you work safely at height? 3. Is the treatment guaranteed? Is pressure washing safe for cladding? High pressure can damage cladding, forced water behind it, and void roofing or cladding warranties. Ask what method they use and check the product warranty. ## Related trades * [Earthmovers, excavation and site prep](/trades/earthmovers/) * [Drainlayers](/trades/drainlayers/) * [Concrete and foundation contractors](/trades/concrete-foundations/) * [Retaining wall builders](/trades/retaining-walls/) * [Paving and driveways](/trades/paving-driveways/) * [Fencing contractors](/trades/fencing/) * [Decks and pergolas](/trades/decks-pergolas/) * [Landscapers and landscape designers](/trades/landscapers/) [All trades](/trades/) · [Trades by project type](/projects/)