Contact Us Avalon Customer Service Number: 203-746-8844. Due to the high volume of Emails, we encourage you to contact us on our customer phone number. That way we can continue to provide the best quality of service and expedited response. As an added convenience, we have provided the contact form below. Your name (Required) Your email (Required) Subject (Required) Please Choose: WindowsDoorsSidingDecksInsulationGuttersRoofing Your message (Required) Δ