Helifix Crack Stitching

Repairing cracks in masonry walls is an essential maintenance task to ensure the safety and longevity of any building. Ignoring these structural issues can lead to more significant problems and potentially costly repairs. Fortunately, repairing cracks in walls is a straightforward process if the correct materials and techniques are used. In this article, we will discuss how to use HeliBar and HeliBond to repair horizontal and vertical cracks in masonry walls.

Step 1 Prepare the Crack: The first step is to prepare the crack for repair. Rake out or cut slots into the horizontal mortar beds, a minimum of 500mm either side of the crack, to the specified depth. The slot should be at least 10mm wide to accommodate the 6mm diameter HeliBar. All mortar must be removed, together with any loose debris, to ensure a sound bond.

Step 2 Clean the Crack: The next step is to clean the slot. Clean out the slot with a blow pump and apply HeliPrimer WB or flush with water. This step is critical as it ensures that the bonding agent will create a strong bond with the masonry.

Step 3 Apply the HeliBond: Using the CS Pointing Gun Kit, inject a bead of HeliBond to the back of the slot. HeliBond grout is the recommended bonding agent, but PolyPlus resin can be used for smaller jobs or where loads are to be rapidly applied.

Step 4 Insert the HeliBar: Using a finger trowel, or similar, push the HeliBar into the grout to obtain good coverage. The HeliBar should be long enough to extend 500mm beyond the outer cracks if two or more cracks are close together.

Step 5 Add More HeliBond: Insert a further bead of HeliBond over the exposed HeliBar, finishing 10-15mm from the face, and ‘iron’ into the slot using a finger trowel. This step ensures that the HeliBar is securely bonded to the masonry.

Step 6 Fill the Crack: Make good the vertical crack with an epoxy-based weatherproof filler e.g. Crackbond TE. Repoint the mortar bed and make good.

In conclusion, using HeliBar and HeliBond to repair cracks in masonry walls is a straightforward process that can save building owners a significant amount of money in costly repairs down the line. By following the steps outlined above, property owners can ensure that their buildings remain safe and structurally sound for years to come. Remember to use the correct tools and materials and follow all safety guidelines when performing these repairs.

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