Bitmap Bitmap Bitmap Bitmap Avalanche window cleaning is a small, owner operated business specializing in residential window washing and deep screen cleaning services in South Denver and surrounding areas. When choosing Avalanche window cleaning you will always know who is coming to your house. No subcontractors or employees. I do all the work myself. Your property is protected by my $1 million insurance policy. Please contact me today for your FREE estimate. 100% satisfaction guaranteed!