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.
Stock up and Save! Buy our 100 pack here
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.
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.
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 |
Below is the standard tariff for guidance purposes.
Actual costs will be confirmed at point of sale and any variances you will be notified within 24 working hours of receipt of order
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We offer free next-day delivery for all orders over £150 (ex VAT) (UK Mainland Only).
Next day delivery is available for orders placed before 2pm Monday - Friday (working days). Delivery will be made on the next working day.
For orders placed before 2pm on a Friday, delivery will be made on the following Monday. For orders placed after 2pm on a Friday and over the weekend, delivery will be made on the following Tuesday. For orders placed on a Bank Holiday, goods will be dispatched on the next working day (e.g goods will be dispatched on the Tuesday for delivery on Wednesday).
These delivery options are available at an extra charge. Delivery prices are shown at checkout stage. Orders need to be placed before 2pm Monday - Friday (working days) for delivery on the following working day.
Please note we no longer offer international delivery.
Further information regarding Delivery can be read at our Terms & Conditions.
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 sales@twistfix.co.uk 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.