Promotional value expires 180 days after purchase. Amount paid never expires. Limit 1 per person, may buy 1 additional as gift. Valid only for option purchased. Limit 1 per household per 12 month period. Limit 1 per visit. Appointment required. Valid within 20 miles from 78704. No valid on new construction or garage attics. Valid on residential properties only. Call office for details/questions prior to purchasing voucher. Groupon customers receive additional 50% off any additional foil/insulation installation performed at time of visit. Merchant is solely responsible to purchasers for the care and quality of the advertised goods and services. Learn about Strike-Through Pricing and Savings