Interlocking Stone Our interlocking stone designs and installations include driveways, walkways, paths, front entrances, and patios. Johnston’s Greenhouse designs and installs outdoor entertaining areas, pool decks and more to make the most out of your outdoor living space. Our designers can implement your ideas and bring them to life using interlocking stone, a great landscaping material that holds up to extreme temperatures, water and heavy use. We back all our construction work with a full guarantee. Contact us today!