Stitch-Tie Asymmetric Wall Tie - Box of 100

Stitch-Tie Asymmetric Wall Tie — Optimized Connection Between Soft Veneer and Hard Backup Masonry

The Stitch-Tie Asymmetric is a helical masonry wall tie engineered specifically for situations where a soft external substrate must be connected to a harder internal backup wall. One end features a smaller diameter (2"–3") for embedment into denser backup material, while the opposing 8-mm or 10-mm helical end engages softer masonry veneer. This asymmetric design delivers optimum tension capacity at the connection without compromising either substrate. It is intended for use by masonry contractors and restoration professionals working on new construction and masonry restoration projects.

Standard 8-mm or 10-mm helical ties driven into high-density concrete backup can require a larger pilot hole, which simultaneously enlarges the veneer pilot hole and reduces anchorage capacity in the veneer. The Stitch-Tie Asymmetric solves this problem by using a smaller-diameter end at the backup material, maintaining proper embedment and load capacity in both substrates without the need for oversized pilot holes. PROSOCO recommends a mock-up installation on-site to confirm suitability and establish optimum pilot hole sizing before full installation.

Technical Specifications

Key Features & Benefits

Asymmetric Dual-Diameter Design

The tie features two distinct diameters — a larger helical end for soft veneer engagement and a smaller end for penetration into harder backup material. This eliminates the need for an oversized pilot hole in the backup, preserving full anchorage capacity in both substrates and delivering optimum tension at the connection.

Self-Tapping Installation with Minimal Disturbance

The Stitch-Tie Asymmetric self-taps directly into a small pilot hole drilled into the substrate, requiring no adhesive or mechanical anchors. This minimizes disruption to the surrounding masonry, which is especially valuable in restoration work where preserving existing material is a priority.

Helical Continuous Grip

The helical geometry creates continuous mechanical engagement along the embedded length rather than relying on point contact. This distributed grip enhances pull-out resistance and long-term connection reliability in both the veneer and backup materials.

Color-Coded for Efficient Jobsite Use

Color coding allows installers to quickly identify the correct tie size and orientation, reducing the chance of installation errors and speeding up the workflow when multiple tie configurations are on-site.

Installs Flush — Fully Recessed Below Masonry Face

Once driven to the required depth, the tie sits fully recessed below the face of the masonry and the installation hole is repaired with matching mortar. This produces a clean finish with no protruding hardware and maintains the aesthetic integrity of the wall face.

Stainless Steel Construction

Available in 304 SS or 316 SS, both grades provide corrosion resistance appropriate for exterior masonry wall applications. The 316 SS option is available for projects requiring enhanced resistance to chloride or coastal environments.

Common Applications

Masonry Veneer to Concrete Backup Wall Connection

The primary application is tying a soft brick or masonry veneer to a high-density concrete backup wall where a standard same-diameter helical tie would require an oversized pilot hole to penetrate the harder substrate.

Masonry Restoration and Re-Tying

Used in restoration projects where existing wall ties have failed or corroded and the cavity wall must be re-tied without major disruption to the masonry. Self-tapping installation through pilot holes keeps structural disturbance to a minimum.

Mixed-Substrate Cavity Wall Construction

Suitable for new construction scenarios where the designer specifies different masonry materials for the inner and outer leaf, requiring a tie that accommodates the differing hardness and density of each substrate.

Compatible Materials

• Soft external masonry veneer (brick, softer block, natural stone veneer)
• High-density concrete masonry unit (CMU) backup walls
• Concrete backup walls
• Harder internal masonry substrates where standard helical ties require oversized pilot holes

Product Documents

• Stitch-Tie Asymmetric Submittal Sheet (PDF)

Application Instructions

Installation Procedure

1. Drill the pilot holes through both leaves of the wall to the required depth and diameter. PROSOCO recommends completing a mock-up installation on-site beforehand to establish the optimum pilot hole size for the specific substrates present.
2. Insert the appropriate setting tool into an SDS rotary hammer drill, then place the Stitch-Tie Asymmetric Wall Tie into the setting tool with the correct orientation (smaller-diameter end toward the backup material).
3. Drive the Stitch-Tie Asymmetric into the internal leaf to the required depth, ensuring the tie is fully recessed to the external leaf and sits below the face of the masonry.
4. Repair the surface of the pilot hole with matching mortar to restore the wall face.

Frequently Asked Questions

Q: Why use the Stitch-Tie Asymmetric instead of a standard same-diameter helical wall tie?
A: When connecting to high-density concrete backup, a standard 8-mm or 10-mm helical tie often requires a larger pilot hole to penetrate the harder material. Enlarging the pilot hole in the veneer simultaneously reduces anchorage capacity in that substrate. The asymmetric design uses a smaller diameter at the backup end so the backup pilot hole can remain appropriately sized without over-drilling the veneer side.

Q: How is the correct pilot hole size determined for a specific project?
A: PROSOCO recommends performing a mock-up installation at the project site before committing to full installation. This allows the installer to test different pilot hole sizes and confirm that optimum tension capacity is achieved in both the veneer and backup portions of the anchorage under actual site conditions.

Q: What tools are required for installation?
A: Installation requires an SDS rotary hammer drill and the appropriate setting tool for the selected tie diameter. The tie is self-tapping and drives directly into the pre-drilled pilot hole without the need for adhesive or separate mechanical fasteners.

Q: What stainless steel grades are available?
A: The Stitch-Tie Asymmetric is available in 304 stainless steel and 316 stainless steel to suit varying project corrosion resistance requirements.