**Terms of offer: Amazon gift card rebate of $25 for all INSULATOR SERIES window orders of 5 windows or more purchased from 2/15/18 through 12/31/18. Purchaser must register for this offer by mentioning promo code Amazon18 at the time of setting estimate appointment, and this rebate certificate must be attached to the window order form at time of purchase. All windows must be installed by WeatherMaster no later than 2/28/19. Rebate will not be paid to purchasers with outstanding balances, or on orders not paid in accordance with the payment terms. Purchaser should receive rebate within 4 to 8 weeks of completion of installation and final payment. Not valid in conjunction with other rebate or coupon offers.