DryFix
Dry mechanical pinning and remedial wall tie system
DryFix is the simple and cost-effective solution to a variety of pinning and tying problems including retrofitting wall ties to masonry suffering from failed, missing, inadequately spaced or corroded wall ties...Learn more»
The system involves driving a self-tapping, helical DryFix tie through the material to be tied or pinned, typically via a small pilot hole, to provide a solid fixing without mechanical expansion, resin or grout.
Precision engineered from Grade 316 austenitic stainless steel, DryFix ties are quick and easy to install. They are suitable for use in all standard cavity and solid masonry construction and have been designed to be driven through, and into, dry-pressed brick, extruded brick, block, aircrete, concrete, strong mortar, timber, stone and more.
DryFix ties may be used in hollow materials and close to edges. They are sufficiently flexible to permit normal masonry movement, are designed to shed water in cavity construction and provide strong, reliable axial restraint in both tension and compression...Learn more»
APPLICATIONS
- Replacement cavity wall tie.
- Pinning render and thin panels...Learn more»
- Strengthening buildings to meet seismic requirements...Learn more»
- ...More applications»
FEATURES
- Grade 316 stainless steel tie.
- Slim, self-tapping, one-piece design.
- Mechanical fixing, without expansion, in both leaves.
- Small cross-section for stress-free installation and fixing.
- Hi-fin helical profile for optimal mechanical connection.
- Great axial strength.
- Flexibility to accommodate natural building movement.
- Effective in bricks, blocks, concrete, hard mortar and timber.
- Effective in brick veneer, cavity and solid wall constructions.
- Effective close to edges and usable in all weathers, temperatures and environments.
- Patented remedial tying system.
BENEFITS
- Highly economical and easy to install.
- Requires no resin, grout or mechanical expansion.
- Far and near leaf security of fixing easily proof tested...Learn more»
- Multiple drip points prevent cross-cavity water transfer.
- Can be installed working in from the external to internal leaf or working out from the internal to external leaf.
- Can be installed through insulation without affecting its thermal performance.
- Leaves masonry virtually unmarked.
- Minimal inconvenience to occupants.
BONDING AGENT
- None required.
Installation
Example Application
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Mark the locations for the DryFix ties onto the face of the wall at the required spacing...Learn more»
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Drill a small pilot hole (typically 5mm diameter) through the near leaf and into the remote leaf...Learn more»
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Load a DryFix tie into a DryFix Power Driver attachment fitted to an SDS hammer drill.
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Support the power driver with one hand, leaving the other to work the drill, and drive the tie into the hole until the outer end is fully recessed below the face of the masonry. (DryFix wall ties are self-tapping and will work themselves into the wall following the hammer action of the drill.)
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Make good the hole using either a mixture of sand, cement and oxide colouring to match the original surrounding brick surfaces or a silicone sealant coated with brick dust or drillings.
Caution: Always locate, identify and isolate any electrical, water or gas services which may be present in the wall or the wall cavities and can pose a safety risk before drilling or cutting. Always take the necessary safety precautions. Use electrical safety gloves and wear appropriate footwear and eyewear.
Refer to the Helifix Remedial Wall and Pinning Safe Installation Guide for further health and safety information...Download | 588kb »
| TECHNICAL SPECIFICATIONS | ||||
|---|---|---|---|---|
| Material | Diameter | Standard Lengths (mm) | Standard Pack | Product Code |
| Grade 316 stainless steel | 8mm | 155 | 100 | HDF8x155 |
| '' | '' | 170 | 100 | HDF8x170 |
| '' | '' | 195 | 100 | HDF8x195 |
| '' | '' | 220 | 100 | HDF8x220 |
| '' | '' | 245 | 100 | HDF8x245 |
| '' | '' | 270 | 100 | HDF8x270 |
| '' | '' | 295 | 100 | HDF8x295 |
| '' | 10mm | 300+ | Cut to order | HDF10x... |
| Spacing: | Typically, DryFix when used as a remedial wall tie should be installed at 300mm centres around openings and at 600mm centres in unbroken masonry...Learn more» | |||
| Typical DryFix Applications and Recommended DryFix Sizes | |||||
|---|---|---|---|---|---|
| Common Brick/Cavity/Brick wall | Cavity width (mm) | DryFix ø (mm) | DryFix Length (mm) | DryFix Code | |
|
|
< 40 | 8 | 195 | HDF8x195 |
| 40-70 | 8 | 220 | HDF8x220 | ||
| 70-90 | 8 | 245 | HDF8x245 | ||
| 90-110 | 8 | 270 | HDF8x270 | ||
| 110-120 | 8 | 295 | HDF8x295 | ||
| 120 < | 10 | 300 < | HDF10x... | ||
| Note: | As a general rule, DryFix length should equal: Near leaf width less 10mm + cavity width + 60-70mm far leaf embedment depth Allow for additional tie length if any near leaf render or plaster is present. | ||||
| PDF References: | Repair detail BRTO1 and Repair detail BRTO4 | ||||
| Common solid 230mm Brick/Brick wall | Internal Mortar Joint Width (mm) | DryFix ø (mm) | DryFix Length (mm) | DryFix Code | |
|---|---|---|---|---|---|
|
|
10 | 8 | 170 | HDF8x170 |
| Note: | Allow for additional tie length if any near leaf render or plaster is present or if the brick leaves have delaminated. | ||||
| PDF Reference: | Repair detail BRTO5 - Pinning a solid brick wall | ||||
| Brick/Cavity/Concrete Block wall | Cavity width (mm) | DryFix ø (mm) | DryFix Length (mm) | DryFix Code | |
|---|---|---|---|---|---|
A) Connecting brick to block 
B) Connecting block to brick |
|
< 120 | 8 | See note | HDF8x... |
| 120 < | 10 | See note | HDF10x... | ||
| Note: | DryFix length to equal:Near leaf width less 10mm + cavity width + remote leaf embedment depthTypically, ties should be sufficiently long to connect 50-70mm into the brick leaf if connecting first through the concrete block. If connecting first through the brick leaf, each tie should be long enough to connect with at least the outer shell of the concrete block (as pictured) or outer shell and any inner concrete webbing if present. Each tie should be long enough to embed 50-70mm into the inner block leaf if this leaf has been core filled. Allow for additional tie length if any near leaf render or plaster is present. | ||||
| PDF Reference: | Repair detail BRTO6 - Replacing wall ties in a brick / concrete block wall | ||||
| Concrete Block/Cavity/Concrete Block wall | Cavity width (mm) | DryFix ø (mm) | DryFix Length (mm) | DryFix Code | |
|---|---|---|---|---|---|
|
|
< 120 | 8 | See note | HDF8x... |
| 120 < | 10 | See note | HDF10x... | ||
| Note: | DryFix length to equal:Near leaf width less 10mm + cavity width + remote leaf embedment depthTypically, each tie should be long enough to connect with at least the outer shell of the inner concrete block (as pictured) or outer shell and any inner concrete webbing if present. Each tie should be long enough to embed 50-70mm into the inner block leaf if this leaf has been core filled. Allow for additional tie length if any near leaf render or plaster is present. The RetroTie system may be prefered when the tie length greatly exceeds 300mm. Contact Helifix for details. | ||||
| PDF Reference: | Repair detail BRTO6 - Replacing wall ties in a brick / concrete block wall | ||||
| Brick / Cavity / Concrete construction | Cavity width (mm) | DryFix ø (mm) | DryFix Length (mm) | DryFix Code | |
|---|---|---|---|---|---|
|
|
< 120 | 8 | See note | HDF8x... |
| 120 < | 10 | See note | HDF10x... | ||
| Note: | DryFix length to equal:Brick width less 10mm + cavity width + embedment depthTypically, ties should be sufficiently long to embed 35-50mm into the concrete depending on its hardness, with harder concretes requiring less embedment. Allow for additional tie length if any near leaf render or plaster is present. | ||||
| PDF Reference: | Repair detail BRTO7 - Replacing wall ties in a brick / solid concrete wall | ||||
| Standard brick veneer construction | Cavity width (mm) | DryFix ø (mm) | DryFix Length (mm) | DryFix Code | |
|---|---|---|---|---|---|
A) Connecting brick to stud 
B) Connecting stud to brick |
|
< 120 | 8 | See note | HDF8x... |
| 120 < | 10 | See note | HDF10x... | ||
| Note: | As a general rule, DryFix length should equal: Near leaf/stud width less 10mm + cavity width + 60-70mm stud/remote leaf embedment depth Allow for additional tie length if any near leaf render or plaster is present. | ||||
| PDF Reference: | Detail BRTO8 - Replacing wall ties in a brick veneer wall | ||||
| Brick/Cavity/Steel Stud construction | Cavity width (mm) | DryFix ø (mm) | DryFix Length (mm) | DryFix Code | |
|---|---|---|---|---|---|
|
|
< 120 | 8 | See note | HDF8x... |
| 120 < | 10 | See note | HDF10x... | ||
| Note: | DryFix length to equal:60-70mm brick leaf embedment + cavity width + 100mm or more for stud connectionAllow for additional tie length if any render or plaster is present. | ||||
| PDF Reference: | Detail BRTO9 - Replacing wall ties in a brick/steel frame wall | ||||
| More Applications | |||
|---|---|---|---|
Thin panel and render pinning...Read more» |
Brick arch pinning |
Crack stitching a wall near a corner |
Pinning terracotta tiles to masonry Brick arch pinning |
| PDF References: |
Repair Detail BRPO1 - DryFix render and thin panel pinning Repair Detail BMAO7 - Masonry arch pinning Repair Detail BCSO5 - Crack stitching a crack in a wall near a corner |
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