Solid International Ltd. is a national manufacturer & distributor of innovative, interior door solutions to the DIY and profe ... ssional market in Belgium. All our door systems are ready to be installed. As a matter of fact, using our systems has be proven to decrease faulty installation by more than 50% and reduce installation time with 70%. Our range includes a wide assortment of wooden doors, steel doors, primed doors as well as glass doors. read more