In both cases, installation of a wall tie replacement system anchors the brick facade wall securely to the structural inner wall of the building, allowing the transfer and sharing of loads.
What are wall ties?
Wall ties, sometimes called ‘brick ties’, are used in buildings with cavity walls. They are used to join the two leaves of a cavity wall together, allowing the two parts to act as a homogeneous unit. Hidden from view after construction, wall ties play a vital role in ensuring the stability of a building.
What is a wall tie specialist?
What is a Wall Tie Survey? A wall tie survey is a specialist survey which should only be carried out by suitably trained and experienced surveyors, who will assess whether the wall ties present within the structure are doing their job properly, tying the two leaves of masonry adequately.
When should you replace wall ties?
What are the signs of wall tie failure?
- Cracked brickwork (typically horizontal, or stepped)
- Bulging brickwork.
- Rust stained walls.
- Structural problems on similarly facing elevations of neighbouring buildings of similar age / building type.
Where are wall ties?
cavity wall
A wall tie is used to tie the internal leaf and external leaf constructed of bricks, blocks or structural framing with a brick façade. The tie is placed in the cavity wall during construction and spans the cavity.
How often do wall ties need replacing?
In houses built before the 1980s, you can expect the wall ties to last around 15 to 20 years. For properties built since the 1980s, wall ties are generally made of stainless steel and can last over 50 years.
What are ties in construction?
What are Ties in Building Construction? Ties are continuous tensioned reinforcements which are completely anchored and sufficiently lapped mechanically or using weld.
What size are wall ties?
Recommended Lengths of Masonry/Masonry Wall Ties
| Cavity Width (mm) | Length of Wall Tie (mm) |
|---|---|
| 50-75 | 200 |
| 76-100 | 225 |
| 101-125 | 250 |
| 126-150 | 275 |
What is a cavity wall tie replacement?
The corrosion of the cavity wall ties or the lack of sufficient ties used in the original construction means that many properties require either further replacement wall ties to be inserted or a complete cavity wall tie replacement to be carried out. Cavity wall tie replacement is a straight forward procedure.
What are neoprene wall ties?
Neoprene Wall Ties: A replacement wall tie made from 304 stainless steel with Neoprene expanders, the tie is mechanically tightened with a drill which expands the inner and out leaf of the replacement wall tie gripping the tie into place.
What is a wall tie made out of?
Resin Wall Ties: Re-tie cavity walls easily with these resin wall ties. The tie is inserted into a pilot hole pre-filled with resin. When the resin sets, the two leaves are bonded and stability is restored to the cavity walls. Threaded Bar Ties: A replacement wall tie manufactured from 304 stainless steel.
How do you replace a wall tie?
A 5-6mm pilot hole is drilled into the substrate into which the replacement wall tie is placed, the tie is then driven through the outer leaf into the inner leaf with a hammer drill. The tie has fins that cut and grip into the substrate holding the inner and outer leaf in place.
