L Frame Plantation Shutters fitted in Cabra, Dublin 7. L-frame is a frame which fits into the recess. Picking between an L-Frame and Z-frame can be a hard choice but we will do our best to help you make the best looking and most practical solution. Hidden tilt and a split tilt can help you make your shutter more practical and unique. Shutters can really help you wih all your window covering needs.