BowTie

For restraining bowed walls

BowTie is a long stainless steel tie used to stabilise bulging walls, without any external plates, by securing them into the ends of internal floor joists.

BowTie HD is a heavy duty 12mm diameter threaded bar with self-cutting end used to restrain bowing building walls by securing them to internal parallel floor joists or roof beams.

System Components

Drill bit for clearance hole
BowTies
Power support tool
HD Driver
Hand support tool
PolyPlus resin cartridge with extension nozzles and applicator

Installation

1. Mark the position of the joist centre on the external wall and then drill a clearance hole (normally 12mm) through the wall (and first joist if parallel to the wall). Clean out the hole

2. Fit the BowTie Support Tool to an SDS rotary hammer drill, insert the BowTie and drive it into joist end to the required depth – at least 75mm (or through the second joist if parallel)

3. Fit the plastic sleeve over the BowTie and use the support tool to push it to the back of the hole in the masonry (in the outer leaf in a cavity wall)

4. Inject PolyPlus resin to fill the hole and bond the BowTie to the masonry and then make good

BowTie HD

1. Mark the position of the joist centre on the external wall and then drill a clearance hole (normally 16mm) through the wall. Clean out the hole

2. Fit the BowTie HD Support Tool to an SDS rotary hammer drill, insert the BowTie HD and drive it (off hammer) into, and through, the first and second joists

3. Fit the plastic sleeve over the BowTie HD and use the support tool to push it to the back of the hole in the wall (outer leaf in a cavity wall)

4. Inject PolyPlus resin to fill the hole and bond the BowTie HD to the masonry, allow the resin to gel and then make good

Applications

For stabilising bowed external building walls by securing them to internal floor and ceiling joists
Standard BowTies are recommended when installing into joist ends
BowTie HDs are recommended when installing into joist sides

CemTie

Grouted tie for stabilising solid masonry

CemTie is a versatile, fully grouted, remedial tie used to stabilise all forms of solid masonry, secure failed lintels and brick rings, reconnect separated internal and external building walls and repair parapets.

System Components

CemTies of different lengths
Manual applicator and two extension nozzles
Long series drill bits
Brush for cleaning hole
HeliBond cementitious grout

Installation

1. Drill clearance hole to required diameter and depth and flush clean

2. Push CemTie fully into grout-filled pinning nozzle of grout gun and insert nozzle to the back of the hole

3. As grout is injected the CemTie is carried with it

3. As grout is injected the CemTie is carried with it

Applications

Lintel repairs
Securing multi-layer brick rings in bridges, tunnels and arches
Reconnecting separated internal and external building walls
Securing delaminated masonry
Repairing and securing parapets, cornices and decorative fascias

Stabilising bulging rubble-filled wall.jpg

Reconnecting cracked party wall to external solid wall

DryFix

Dry mechanical pinning and remedial tying system

DryFix is a versatile and rapidly installed mechanical pinning and remedial tying system that requires no resin, grout or mechanical expansion.

Other types of the DryFix tie are available for specialist applications. For securing delicate terracotta fixings Helifix offer the DryFix Terracotta, for securing loose render there is the DryFix RenderPin and for securing a soft outer leaf material to a hard inner leaf material is the DryFix Asymmetric.

System Components

RP Drill bits for drilling pilot holes (where necessary)
Load Test Unit and Pull Test Key
Special Power Driver Attachment for rapid installation
Power Driver Extension (where necessary)
DryFix tie
SDS Drill for installation

Installation

1. Drill small pilot hole using rotary percussion drill, 3-jaw-chuck type

2. Load tie into DryFix Power Driver Attachment fitted to SDS hammer drill

3. Drive in tie until outer end is fully recessed below face of masonry

Applications

Versatile replacement wall tie
For securing multiple layers of masonry
For pinning delicate masonry features