Planning a remodeling project? Don't overlook glass block windows. There are many styles and options from which to choose. There are attractive colors and patterns in plastic and glass -- in individual blocks, kits and ready-to- install units for use in both windows and freestanding walls (in both straight and curved designs). Glass blocks are also energy-efficient. Much like double-pane thermal windows, they have a vacuum-filled space that insulates. Beyond their beauty, versatility and efficiency, they offer security against break-ins. Solid bulletproof glass blocks are available; they are virtually indestructible. There are inserts for ventilation, too. Looking for a hot remodeling idea, a cool design technique or privacy, security and energy savings? Don't overlook glass block for windows and walls. And that's the On The House tip for today.