The reward amount is only applicable for the first purchase. If multiple purchases are made by the referred party over time, the referrer does not continue to receive multiple gift cards for each purchase. Referral rewards do not apply to existing projects or appointments, and only to confirmed appointments. Referral rewards are only applicable for new customer referrals (no previously issued appointment). Referrals will only be honored by Thermo-Bilt Windows and Doors and its affiliate locations.