Full contact mortar beds and correct application of bonding mortar ensures no loose slabs, no hollow sounds and provide longevity to your paving….. There are a multitude of other benefits too, such as voids create weak areas especially with natural stone, can cause reflective staining and non full coverage of bonding mortar can cause picture framing on natural stone too…. #hardscaping #patios #paving #landscaping #landscapers ##nosnowflakes | Gareth Wilson Garden & Landscaping Consultant