Repair Systems — 03 — Facade & External Envelope
6mm stainless helical grout-in wall tie
Supplier reference for 6mm Grade 316 stainless steel helical grout-in remedial cavity wall ties for masonry facade remediation on Class 2 strata buildings. The standard diameter for residential and light commercial cavity masonry. Compares Helifix, Thor Helical Australia, and Simpson Strong-Tie by product, regional distribution, and installation system.
What is a 6mm stainless helical grout-in cavity wall tie?
A 6mm stainless steel (Type 316) helical bar installed with cementitious or resin grout into drilled core holes through the outer masonry leaf and across the cavity to the inner leaf. The helical profile provides mechanical interlock with the grout annulus for reliable pullout performance. The standard diameter for most remedial cavity wall tie installations on Class 2 strata buildings.
Product Reference
3 products — 3 brands — 6mm stainless helical grout-in cavity wall ties — scroll to view all
Helifix SockFix / HeliBond — 6mm Stainless Helical Grout-in Tie
6mm Helical Grout-in Cavity Wall Tie
System Description
Helifix 6mm Type 316 stainless steel helical bar installed with cementitious or resin grout as a remedial cavity wall tie for Class 2 strata masonry. The helical profile provides mechanical interlock with the grout annulus, giving reliable pullout performance even in variable or soft mortar beds. Install by drilling an oversize core hole through the outer leaf, threading the helical bar through the cavity and bedding it in the inner leaf with grout at both leaf interfaces. Confirm drill size, grout type, embedment depth and tie spacing with the Helifix technical team and with the structural engineer before proceeding. Perform pull-out testing on a sample of installed ties to confirm in-situ performance.
Technical Properties
- 316 stainless steel — BS EN 1015-11 pullout tested — confirmed corrosion resistance for cavity masonry
- 6mm diameter — standard remedial tie diameter for most single-leaf cavity wall conditions
- Grout-in installation — cementitious or resin grout in the drilled core provides the load-transfer mechanism
Limitations
- Grout-in installation requires a wet grout process — not suitable where grouting would cause staining on the outer leaf face
- Core drilling must be kept square and aligned with the horizontal mortar bed — angled holes reduce pullout performance
- Confirm grout compatibility with the mortar bed — resin grout is preferred in wet or damp cavities
PROCUREMENT SOURCES
Confirm suitability with the current manufacturer TDS before specifying or applying.
Thor Helical — 6mm Stainless Helical Cavity Wall Tie
6mm Helical Grout-in Cavity Wall Tie
System Description
Thor Helical Australia supplies 6mm Type 316 stainless steel helical bars for remedial cavity wall tie installation. Thor Helical products are manufactured and tested to BS EN standards and comply with the requirements of AS 3700 for remedial masonry ties. Installation follows the same grout-in procedure as other helical tie systems — drill oversize core holes through the outer leaf, thread the bar across the cavity, and grout into the inner leaf at both interfaces. Confirm drill size, cavity width, grout type and tie spacing with Thor Helical technical team and the structural engineer. Pull-out testing is recommended on a sample of installed ties to confirm in-situ performance on the specific substrate.
Technical Properties
- 316 stainless steel — tested pullout performance to BS EN standards — AS 3700 compliant
- 6mm diameter — standard remedial tie diameter for single-leaf cavity wall conditions
- Grout-in installation — suitable for cementitious or resin grout depending on cavity moisture conditions
Limitations
- Wet grout process — not suitable where grouting would stain or damage the outer leaf face
- Core drilling must be kept square and aligned with the mortar bed
- Pull-out testing on representative sample required to confirm in-situ performance
PROCUREMENT SOURCES
Confirm suitability with the current manufacturer TDS before specifying or applying.
Simpson Strong-Tie — 6mm Stainless Helical Masonry Tie
6mm Helical Grout-in Cavity Wall Tie
System Description
Simpson Strong-Tie Australia supplies 6mm Type 316 stainless steel helical masonry ties for remedial cavity wall tie installation on Class 2 strata buildings. Simpson Strong-Tie is a major Australian masonry fixings supplier with national distribution, and their helical tie range complies with AS 3700 requirements for remedial masonry ties. Follow the standard grout-in installation procedure — drill oversize core holes, thread the bar through the cavity, and grout into both leaf interfaces. Confirm drill size, bar length, grout type, and tie spacing with Simpson Strong-Tie technical support and the structural engineer before proceeding.
Technical Properties
- 316 stainless steel — tested corrosion resistance for cavity masonry environments
- 6mm diameter helical bar — standard for single-leaf cavity wall remedial tie installation
- Grout-in installation with cementitious or resin grout depending on cavity conditions
Limitations
- Wet grout process — confirm grouting will not stain or damage the outer leaf face before commencing
- Core drilling must be square with the mortar bed for maximum pullout performance
- Pull-out testing on representative sample required to confirm in-situ performance
PROCUREMENT SOURCES
Confirm suitability with the current manufacturer TDS before specifying or applying.
System Comparison
Side-by-side comparison of 6mm stainless helical grout-in cavity wall tie suppliers. Confirm all product selections against current manufacturer TDS before specifying.
| Supplier | Product | Diameter | Grade | Distribution | Key Feature | Primary Use |
|---|---|---|---|---|---|---|
| Helifix Australia | Helifix SockFix / HeliBond | 6mm | 316 SS | National | BS EN tested, broad cavity range | Standard remedial cavity tie |
| Thor Helical Australia | Thor Helical 6mm bar | 6mm | 316 SS | National | BS EN tested, installation accessories included | Standard remedial cavity tie |
| Simpson Strong-Tie Australia | Simpson 6mm helical | 6mm | 316 SS | National | Wide trade supply network | Standard remedial cavity tie |
Do not confuse 6mm grout-in helical ties with:
- 8mm heavy duty helical ties — larger diameter for increased load capacity in parapets, lintels over openings, and high-stress zones — listed on the 8mm heavy duty helical page
- DryFix friction helical ties — friction-fit ties driven directly into pre-drilled holes without grout or resin, used where grout injection is impractical — listed on the DryFix friction tie page
- Chemical resin anchor ties — ties fixed using vinylester or epoxy resin injection into pre-drilled holes — higher load capacity than helical, used in difficult substrates — listed on the cavity ties — resin anchor page
- Mechanical expansion ties — wedge or sleeve expansion anchor ties fixed by torque, no grout or resin required — higher upfront cost, different installation procedure — listed on the cavity ties — mechanical expansion page
- Original cavity wall ties — corrosion-failing mild steel ties already installed in the wall, not a remedial product — do not specify as replacement; use stainless helical remedial ties instead
Disclaimer
This page provides general technical information only. Tie type, spacing, embedment depth, and structural adequacy must be confirmed by a structural engineer against project-specific cavity wall conditions and AS 3700. Tie replacement is a structural repair — engineer inspection and specification are required before installation.