We were tasked to undertake a full measured defect survey, a full Wall Tie Population Survey, a full Wall Tie Condition Survey and a full Wall Tie Corrosion Assessment were carried out using an intrusive removal of masonry to carry out the works. Works were carried out in accordance with BRE Digest 401.
The works were carried out to 5 High Rise Residential blocks in Wolverhampton using our Specialist Rope Access Team to safely access the buildings.
In total 120 locations were surveyed over a 7-week period, with removal and replacement of masonry elements. Some masonry elements were sent away for compressive testing analysis. Historical mortar samples were also taken to determine cement content.
Our Specialist Rope Access Teams can undertake all investigative inspections to high rise buildings, including Carbonation Testing and Chloride sampling to name a few.
What is the purpose of a wall tie?
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 survey?
Cavity wall ties are used in order to tie the two wall skins together when cavity wall construction is utilised. Cavity Wall & Tie Surveys check the integrity of your cavity wall ties.
How many wall ties are needed per m2?
Two and a half wall ties per square metre of masonry. The maximum horizontal spacing is 900mm and the maximum vertical spacing is 450mm.
How do you spot a Problem with Wall Ties?
Common wall tie failure indicators include:
- Horizontal cracking
- Out of plumb, bowed, cracked or collapsed brickwork elevations.
- Rust staining on the walls
- Problems having been identified within properties of a similar age and location.
FRAEW – Fire Risk Appraisal of External Walls.
The Fire Safety Act 2021 requires that the responsible person of a building of multiple occupancy ensures a fire risk assessment of the external walls is carried out. This should be carried out by a suitable expert in external wall systems.
The FRAEW in accordance with PAS9980 is the only assured way of ensuring compliance to these legal obligations. A FRAEW can be required as part of the EWS1 process for higher risk buildings. Using Our specialist Rope Access Teams, we can undertake all High-Rise Inspections based on your requirements.
