Roofs · 3 min read
Cleaning your roof when you have a rainwater tank
How to clean and treat your roof safely when you collect rainwater: disconnecting downpipes, when to reconnect, and what to tell your cleaner.
- Always tell your roof cleaner you have a tank
- Downpipes to the tank are disconnected during cleaning and treatment
- Let rain flush the roof before reconnecting
If you collect rainwater for drinking, garden or household use, your roof is part of your water supply. You can still have it cleaned, with a little planning.
Tell your cleaner first
Mention your tank when you request a quote. It affects how the job is planned and which products are suitable.
Disconnect before cleaning
Downpipes that feed the tank should be disconnected or diverted before the roof is washed or treated, so cleaning water and debris don’t enter the tank.
When to reconnect
Let rain flush the roof and gutters before reconnecting. Your cleaner should tell you how long to wait for the products used. If your tank supplies drinking water, follow the product guidance carefully and err on the side of caution.
Clean gutters matter too
Leaves and sludge in gutters can taint tank water. A gutter clean at the same time keeps your supply cleaner.
Frequently asked questions
Can I keep my tank connected if you only wash the roof?
It’s safer to disconnect during any roof cleaning, as dislodged dirt and debris will wash into the tank.
Maidly looks after homes across Christchurch with eco-friendly methods and a 100% work guarantee on every service. Request a free quote.