Pressure Cleaning a Roof.

It is often thought that pressure cleaning your roof is harmful for it. The main misconception is that it can result in damage to the roof tiles and gutters. If not done correctly this may be true, however, experts recommend pressure cleaning as a quick and cost effective way to add years of life to your roof and give it a healthy, new appearance. Pressure cleaning is also a great way to clean out your gutters and downpipes, leaving them better looking and more effective. Once the pressure cleaning is finished, a clean surface allows for easier repairing and repainting.

Pressure washing, however, is best left to the professionals. The use of pressure washing equipment with high psi velocity used to remove moss, dirt, dust and other accumulated items is dangerous work. Working on a roof surface requires care and experience, especially when it becomes wet. Don't risk your health and safety, contact your professional pressure cleaning company.

Avoid Setting The Pressure To The Highest Setting.

Using the highest water pressure will definitely give the fastest results, however, you will increase the risk of damaging the roof and breaking your roof tiles. Most professional roof pressure cleaning companies will use a lower water pressure, even though it will possibly take longer to give your roof an effective clean looking appearance.

Be Careful Using A High Pressure Power Washer.

If you decide to do your own pressure washing, for your own safety, make sure you understand it has to be done very carefully. The pressure from power washer added to the slippery surface of your roof makes for a very dangerous procedure. It is difficult to angle the water so it doesn’t flow under your roof tiles. Dragging the hose over your roof makes it a trip hazzard which adds more risk of injury to you and anyone around you. It is always best to leave pressure washing to the professionals.

Be Careful Where You Walk.

Roofs are made with supporting beams and rafters. Professional pressure washing specialists know where the supporting rafters and beams are and ensure they walk only on the tiles which are directly above them. Walking on tiles between the rafters can result in breaking the tiles, or worse, falling through the roof. Trying to save money by doing the pressure washing yourself can result in much more expensive roof repairs.

Use The Correct Tools

The pressure washing equipment a professional company uses will , nearly always, be better quality than a normal householder will use. They will be more powerful and more technologically advanced, providing a quicker and higher quality result. A professional may also special chemicals, including chlorine. It's important to understand the correct use of chemicals to ensure there is no harm to you or your roof.

Know Your Limits, and Your Equipment's Limits.

Some stains and spots can be difficult to remove. You need make sure to know the limits of the equipment you are using, and do not use too much pressure which can result in damage to the roof and the tiles.
Pressure washing a roof is something which involves high risk. 

It's very important to understand the risks and decide if you really want to do it yourself or hire a professional.

Hiring a professional roof pressure cleaning company will always be the better option.