8mm Helical Bar Crack Stitch Repair Kit
8mm Helical Bar Crack Stitch Repair Kit for stabilising cracks in brick and stone walls.
Helical bars are bonded into slots chased out of the mortar bed to stitch across cracks in the wall, 500mm either side of the crack. Tensile forces are redistributed along the full length of the structural reinforcement, to effect a masonry crack repair that stabilises and strengthens the wall.
This wall crack repair kit offers a cost effective, retrofit solution for the permanent repairs of cracks in masonry.
Using a suitable chasing unit, cut out horizontal slots in the mortar bed to the relevant depth. The helical bars are to extend 500mm into sound masonry either side of the crack. The maximum vertical spacing between bars should not exceed 450mm.
|Wall Thickness||Depth of Slot||Depth of Bar|
|102mm||30 – 35mm||20mm|
|215mm||40 – 45mm||30mm|
Where the crack is less than 500mm from a corner or opening then the helical bar should be continued for a minimum of 100mm around the corner or reveal avoiding and DPC membrane. Remove all dust and debris from the slot with a blow-out pump and soak the slot with clean water using a bottle spray. For clean, dust free cutting use a vacuum attachment on the chasing unit.
6mm Helical Bar kits are available HERE.
To repair the bricks that have also cracked we recommend the Wykamol Crack Sealer Plus.