Purchase 4 or more windows or patio doors by 6/30/19. Subject to credit approval. Interest billed during the promotional period but waived if the purchase amount is paid before the expiration of the promotional period. Financing for GreenSky® consumer loan programs is provided by federally insured, federal and state chartered financial institutions without regard to age, race, color, religion, national origin, gender or familial status. Available only at participating locations. Not valid with any other offer. Must present coupon at time of order. Coupon void if altered. Expires 06/30/2019.