A complete and simple solution to thermal bridging where a 30 minute fire barrier is required to close the cavity using a returned block work detail.
Condensation build up on the cold spots around window and door openings can lead to staining and mould growth at the reveals due to the lack of insulation where the cavity is closed. Along with providing a thermal break at the returned reveal, Stonecor also acts as a vertical DPC barrier to restrict moisture tracking from the external leaf at the jambs.