Frequently Asked Questions
I’ve heard water blasting can ruin decks… is this actually safe?
You’re right to be careful. High pressure water blasting can chew into timber and leave the surface rough or splintery. That’s exactly why Chemwash East Waikato uses a low pressure system. We pair gentle pressure with a biodegradable detergent that loosens dirt, mould, and grime without biting into the wood. The goal is to restore the surface safely, not strip it or shorten its life.
Can you really bring the colour back? My deck is very grey.
In most cases, yes. That silvery or dark look is usually a film of weathering, mould, and general buildup sitting on top of the timber. Our low pressure process removes that layer and reveals the natural colour underneath. Many customers are surprised at the before-and-after, as it often exceeds expectations.
Will the deck get slippery again as soon as it rains?
Not for a while. Slipperiness is mostly from algae and mould. A proper Chemwash clean clears away those contaminants, so the surface is grippier as well as cleaner. If you’ve got kids, or regularly host visitors, it’s a simple way to cut down the slip risk.
Should I get the deck cleaned before staining or painting?
Absolutely. Coatings like these stick far better to a clean surface. By removing dirt, mould, and old residue first, you’ll get a more even finish and help the stain or paint last longer. A Chemwash clean is the ideal first step before you restain or repaint.
Are your products safe around pets and plants?
Yes. Our detergents were developed by a leading industrial chemist to be safe around pets, plants, and people. We’re also particularly careful around gardens and other outdoor features. As a small precaution, we recommend keeping pets indoors during the clean so they don’t wander through wet areas. We’ll let you know when it’s all clear for them to head back outside.
How much does a Deck Clean or Fence Clean cost?
There’s no one flat price, because each property varies in size, condition, access, and. What we can do is give you a free, fast, no-obligation quote with clear, upfront pricing. Each quote is customised to your property, so you always get the most accurate cost estimate.
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