Our Technical Department can provide you with a full support serviceincluding: If your application differs from this repair detail or you require specific adviceon your particular project, call the Helifix Technical Sales Team on 020 87355222. Helifix Pointing Gun CSwith mortar nozzleįor smoothing pointing. 3-jaw-chuck drill with mixing paddleįor injection of HeliBond into slots. Pointing may be carried out as soon as is convenient afterthe HeliBond has started to gel.įor cutting slots up to 40mm deep.Twin-bladed cutter withvacuum attachmentįor mixing HeliBond. Point up the remaining slot with a suitable matchingmortar and make good the crack using anappropriate Helifix bonding agent depending on thewidth of the crack. Inject additional HeliBond asnecessary, leaving 10-15mm for new pointing.Ĩ. Inject a second bead of HeliBond grout over theĮxposed HeliBar and iron it into the slot using afinger trowel. Push the 6mm HeliBar into the grout to obtain goodĬoverage.7. Mix HeliBond cementitious grout using a powermixer and load into the Helifix Pointing Gun CS.Ĥ. Ensure the slot is damp orprimed prior to commencing step 5.ģ. Where the substrate isvery porous or flushing with water is inappropriate,use HeliPrimer WB. Remove ALL dust and mortar from the slots andthoroughly flush with water. Ensure that NO mortar isleft attached to the exposed brick surfaces in order toprovide a good masonry/grout bond.Ģ. Using a twin-bladed, diamond-tipped wall chaserand vacuum attachment, cut slots into the horizontalmortar joints, to the specified depth and at therequired vertical spacing. HELIFIX MASONRY REPAIR DETAILS © April 2009Ĭrack Stitching a Cavity Wallusing HeliBarsġ. The above specification notes are for general guidance only and Helifix reserves the right to amend details/notes as necessary. In all instances the slot must be thoroughly damp or primed prior to injection of the HeliBond grout. Do not use HeliBond when the air temperature is +4☌ and falling or apply over ice. Ideally additional wetting of the slot, or priming with HeliPrimer WB, should be carried out just prior to injecting the HeliBond grout. In hot conditions ensure the masonry is well wetted or primed to prevent premature drying of the HeliBond due to rapid de-watering. Where a crack is less than 500mm from the end of a wall or an opening the HeliBar is to be continued for at least 100mm around the corner and bonded into the adjoining wall or bent back and fixed into the reveal, avoiding any DPC. Normal vertical spacing is 450mm (6 brick courses). HeliBar to be long enough to extend a minimum of 500mm either side of the crack or 500mm beyond the outer cracks if two or more adjacent cracks are being stitched using one rod. For thin mortar joint specifications refer to the Helifix Technical Dept. Height of slot to be equal to full mortar joint height, with a minimum of 8mm. Depth of slot into the masonry to be 25mm to 40mm.
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