A roof is considered to be one of the most important features of a building. If you have a tile roof, you’re in a good spot; this is often a roofing material that is revered across the state of Florida for its resiliency. Tile roofs can come with a beautiful earth tone and they last much longer than traditional asphalt shingle roofs. They do require a bit of maintenance and one of the main things that are required for keeping your tile roof is keeping it clean regularly. Many people feel as though they should be pressure washing their roof to keep it clean easily. Here are some of the top 5 reasons you should not pressure wash a roof!

It Can Void Your Warranty

A pressure washer can quickly void your roof manufacturer’s warranty. 1200 PSI will cause irreparable damage to your roofing systems and ruin any chance you have of redeeming a warranty down the line.

Damage to Roof Underlayment

Pressure washing can cause issues with your roof’s flashing, the sheet metal system put in place to prevent water from leaking into your underlayment. If this occurs, your underlayment could sustain some serious damage!

Etching Tile Surfaces

Etches in the tile can lead to a deeper crevice which can foster algae growth. As you continue to etch into the tile, the chance for discoloration and plant growth continues to increase.

Roof tile pressure wash

Change to Color

You can dull the look of your tile roof over time when you choose to pressure wash it. To preserve its colors and look, you will need to use a gentle cleaning method.


Pressure washing often leads to the waterproof flashings being loosened. As these items keep loosening, this will lead to the chance that water will leak in and cause damage throughout your household.

Pressure washing your roof is not worth voiding your warranty and further ruining your tiles! With the integrity of the tiles being responsible for the strength of your roof, you will need to be extremely careful with your cleaning methods to preserve your overall roofing structure.

Contact us today for safe cleaning methods for your tile roof!

This post was written by Ted Williams! Ted is the owner of An Old Time Roofing which offers the best Pinellas County roofing! Ted is a Master Elite Weather Stopper GAF Roofing Contractor, a double award winner of Best Steep-Slope Contractor from GAF, and achiever of Master Elite Consumer Protection Excellence from GAF. He has been serving the Pinellas County area