What’s Involved in a Roof Clean? A Step-by-Step Guide for Homeowners
Your roof is one of the most important parts of your home, yet it’s often the most neglected. Over time, moss, algae, lichen, and debris can build up, leading to damage, reduced energy efficiency, and a tired-looking exterior. That’s where roof cleaning comes in. But what exactly does a roof clean involve?
Whether you’re hiring professionals or considering a DIY approach, here’s a breakdown of the full process.
🪜 1. Initial Inspection and Assessment
Before any cleaning begins, a thorough inspection is essential. Professionals will assess:
The type of roofing material (asphalt, tile, slate, metal, etc.)
The extent of moss, algae, or lichen growth
Any signs of damage or wear
Safety risks and access points
This step ensures the right cleaning method is chosen and helps avoid further damage.
🧹 2. Debris Removal
The first physical step in cleaning is removing loose debris such as:
Leaves
Twigs
Dirt
Nesting materials
- Down pipes temporally blocked
🧴 3. Application of Cleaning Solution
Depending on the method (softwash or steam clean), a cleaning solution may be applied to:
Kill moss, algae, and lichen at the root
Break down stains and organic buildup
Prevent regrowth
Softwashing uses eco-friendly, biodegradable chemicals, while steam cleaning relies on high-temperature water vapor.
🧽 4. Gentle Cleaning Process
The roof is then cleaned using one of the following techniques:
Softwashing: Low-pressure rinse combined with chemical treatment
Steam Cleaning: Low-pressure, high-temperature steam to lift grime
Manual Scrubbing (for delicate areas): Brushing away stubborn growth
High-pressure washing is generally avoided, as it can damage roofing materials and void warranties.
💧 5. Gutter and Downspout Flush
A roof clean isn’t complete without clearing the gutters. Moss and debris dislodged during cleaning often end up in the gutter system, which can lead to blockages and water damage.
Professionals will:
Remove debris from gutters
Flush downspouts
Check for proper drainage
🔍 6. Final Inspection and Preventative Treatment
After cleaning, a final inspection ensures:
All growth and stains are removed
No damage occurred during cleaning
Preventative treatments |(biocide applied)
Some services offer roof sealing or protective coatings to extend the life of your clean.
🛡️ Why It Matters
Regular roof cleaning:
Extends the life of your roof
Prevents costly repairs
Improves curb appeal
Enhances energy efficiency
Protects your home from pests and water damage