1 m x 6 mm Crack Stitching Bars for repairing cracked walls - 10 pack

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(31 items in stock)

Crack Stitching Bars.

Helically twisted crack stitching bars are stainless steel reinforcing rods that permanently reconnect and reinforce cracked walls. Our standard stainless-steel helical bars are 1 metre long and 6 mm in diameter and sold in packs of ten.

Fitting Helical Bars.

Cut or grind slots along the selected bed joints, 500 mm, on each side of the crack. The height of the slot must be 3 mm more than the bar diameter. Clean the openings and flush them with clean water. Mix WHO 60 grout and load it into the applicator. Dispense the mixture to fill each slot to two-thirds deep. Push the rods into the grout and trowel the displaced mortar to fully cover the rod. The grout sets around the peaks and troughs of the helix and bonds the reinforcing rods firmly within the wall. Finish by pointing the wall to conceal and disguise the installation. This crack stitch method repairs vertical, diagonal, and step-cracks in brickwork.

How Helical Stitching Bars Work.

Each grout-bonded helical bar stitches across the crack, absorbing axial loads and spreading them along the entire helix length. A series of stitching bars centred along a crack creates a reinforced zone that increases the brickwork's tensile, shear and flexural strength.

Our 6 mm helical bars comply with EN 845-1 for retrofit masonry reinforcement. One grout-bonded bar delivers tensile resistance of over 8 kN, and two bars in one slot 16 kN. The reinforcement reconnects cracked brickwork, restoring its strength and resistance to further cracking.

Buy our British-made crack stitching bars; the rods have patented engineering tolerances. To fix the helical reinforcement bars into walls, you need WHO 60 grout, a mixing paddle, a pointing iron and a mortar applicator.

Crack Stitching Bars for Sale from Twistfix.

Twistfix keeps its best-selling crack stitching bars in stock, ready for fast delivery across the UK. Click here for help & expert advice on how to repair cracked walls.

Product Specification - 6 mm Crack Stitch Bars
 Brand  Twistfix
 Helix Diameter  6 mm
 Bar Length  1 m
 Cross Sectional Area  8 mm 2
 Material  Stainless Steel (ASIS 304)
 Lead Distance (360 o twist)  30 mm
 Ultimate Tensile Strength  1025 to1225 Nmm 2
 Mean Tensile Capacity  9 kN
 0.2 % Proof Stress  > 870 N/mm 2
 UKCA & CE Mark Compliant with  BS EN 845-1:2013
 UKCA & CE Mark Test Method  BS EN 846-4:2002
 Tensile Load - 1 Bar bonded in bed joint with WHO 60 Grout   8.39 kN
 Tensile Load - 2 Bars bonded in bed joint with WHO 60 Grout   16.00 kN
 Packaging  1 Bundles of 10 pieces
 Manufactured for Twistfix by  Thor Helical
 Country of Manufacture  United Kingdom

Delivery options are only available for delivery to mainland UK (excluding Scottish Highlands, Scottish Islands, Channel Islands, Isle Of Man Northern Ireland and Eire). Delivery to Scottish Highlands, Scottish Islands, Channel Islands, Isle Of Man, Northern Ireland and Eire are limited to 20kg and are available at a Premium rate. Please contact us on or via our help line if delivery is required outside these areas. Alternatively select ‘World-wide Delivery’ and a member of our sales staff will contact you regarding your options and costs.


We offer for the mainland UK , as standard, a FREE delivery service on all orders having a value greater than £200.00 (excluding VAT). For orders having a value less than £200.00 (excluding VAT) a carriage fee of £8.50 + VAT will be levied. Goods will be sent by a national carrier on their 1-2 working day standard service. Customers must understand that delays can always happen while their order is with the courier, for this reason we can not guarantee your order will be with you next day.

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Items returned and received in their original condition and packaging within 14 days of delivery will be accepted for exchange or refund subject to a 20% restocking fee. You will be responsible for the shipping costs incurred in returning the goods and should ensure the items are adequately insured while in transit to us. You should email to request to return items.

Where the goods are being returned because they are faulty or are not the goods that were ordered then, subject to the goods being returned in re-saleable condition, Twistfix will refund the cost of return shipping. Further information regarding Returns can be read at our Terms & Conditions.