Wall Ties & Retaining Clips
Kingspan K8 Cavity Boards are normally held in position by the wall ties used to tie the two skins of masonry together, using retaining clips.
Walls are constructed in the conventional manner but with the first run of wall ties at least one course below the damp proof course and at approximately 600 mm horizontal centres.
A section of the inner or outer leaf of the wall is built up to the course below the next run of the wall ties which are situated at a spacing of 450 mm vertically and not exceeding 900 mm (750 mm in Ireland) horizontally.
The K8 board is then placed in position behind the retaining clips on the wall ties, additional wall ties and clips are used to retain the top of the board.
Additional ties may also be required at corners, junctions and cut board ends. Each board should be secured at a minimum of three points. The boards should form a reasonable butt jointed row. The other leaf is then built up to the level of the top of the boards and construction proceeds.
The first row of boards commencing below damp–proof course level also provides some edge insulation to the floor slab.
Successive sections of wall incorporating wall ties and clips are constructed and Kingspan Kooltherm K8 Cavity Board is installed as work proceeds up to the required height.
After raising each section of inner leaf, before installation, excess mortar should be removed and mortar droppings cleaned from exposed edges of the installed slabs.
Use of a cavity batten or cavity board is recommended to protect board edges and maintain a clear cavity.
Cutting should be carried out either by using a fine toothed saw, or by scoring with a sharp knife, snapping the board over a straight edge and then cutting the facing on the other side. Ensure accurate trimming to achieve close butting joints and continuity of insulation.
Daily Working Practice
Installed K8 cavity boards should be protected against inclement weather.