Snagging is the process of checking a new build property for defects, poor workmanship and more issues that would fail building regulations. Almost anything in a new property can be snagged during a snagging survey. A snagging inspector will look for anything broken or damaged during the construction process, review how well fixtures and fittings have been installed, and check the quality of building and decorating finish. Examples of the types of issues a snagging inspector will come across are various paintwork poor workmanship related to paintwork and decoration in the house , plumbing works any leaks and loose bolts that could potentially cause a leak ,Plasterwork patching and redecoration, Ceramic tiling and bathroom tiling grouting incomplete, Architraves , loft hatches and skirting boards require caulking, External brickwork requires missing weep vents and brick acid wash plus out of plumb and out of tolerance, Block work not fully pointed, Loft insulation incomplete and not laid correctly causing drafts within the house,Extractor fans venting into roof and ceiling voids, Broken roof tiles, Defective or scratched windows, 

A full list would be near never ending as anything in a property could be snagged. A typical new home in the UK will return over 100 snags as most developments are built on mass and to tight timelines.