When your adult children start hosting their parties on your newly-built backyard deck, you know you’ve done something right. “I’ve got four grown kids, and they have their parties over here now,” Gary Gansar said, referring to his 817 square-foot mahogany DeckTec deck that was completed in May. Maybe it’s the great music, with separate upper and lower deck controls for the Sonos sound system, the television designed specifically for the outdoors, or the cozy indoor comforts brought outside. “DeckTec installed a fairly large pergola that we’ve suspended a swing from, people get a lot of use and enjoyment out[...]