Comprehensive Wall Tie Replacement at Wimborne Primary School: A Portsmouth Restoration Project
In March 2021, our expert team undertook a significant wall tie replacement project at Wimborne Primary School in Portsmouth. This project was part of a larger restoration initiative commissioned by Portsmouth City Council, focusing on critical structural repairs and ensuring the long-term stability of the building.
Project Background and Objectives
The primary goal of this restoration project was to address issues related to wall tie failure. Wall ties are essential components in masonry construction, providing structural support and preventing wall movement. At Wimborne Primary School, it was observed that the existing wall ties were failing, leading to potential risks of structural instability.
Portsmouth City Council requested a specific approach to the wall tie replacement process. Instead of following the conventional method of isolating and replacing wall ties, the client required a more invasive technique. The directive was to remove the brick adjacent to each tie and completely extract the old tie from the inner leaf of the wall. This method was chosen to prevent any future cracking, particularly given that some external mortar joints were less than 5mm wide.
Detailed Execution and Challenges
Removing wall ties from the inner leaf of a wall presented several challenges. The proximity of the wall ties to the internal plaster—often less than 20mm—made the process particularly risky. Any mistake could potentially damage the internal plaster, which required the utmost precision and expertise.
Our team of skilled professionals approached this task with meticulous care. The process involved:
- Careful Removal of Adjacent Bricks: We removed the bricks next to the wall ties, ensuring minimal disruption to the surrounding structure.
- Extraction of Old Wall Ties: Each old wall tie was extracted from the inner skin of the wall, which required specialized tools and techniques to avoid damage.
- Installation of New Helical Resin Ties: Due to the soft nature of the existing brickwork, we used helical resin wall ties. These ties are ideal for soft brickwork as they provide a strong bond without causing additional stress to the masonry.
- Repointing and Restoration: Once the new ties were installed, we repointed the affected areas with mortar that matched the existing brickwork, ensuring a seamless finish.
Project Duration and Results
The wall tie replacement project, along with other restoration activities, took approximately two months to complete. Throughout this period, we worked closely with DM Habens, coordinating all efforts to ensure the project met the highest standards of quality and efficiency.
Our successful completion of this project, without any damage to the internal walls, was a testament to our team’s expertise and attention to detail. The restoration not only addressed the immediate structural issues but also enhanced the overall integrity and longevity of Wimborne Primary School.
Why Choose Our Wall Tie Replacement Services in Portsmouth?
Our commitment to delivering top-quality wall tie replacement services in Portsmouth is evident from our work at Wimborne Primary School. We combine advanced techniques with skilled craftsmanship to ensure that every project is completed to the highest standards. Whether you’re dealing with wall tie failure or other structural issues, our team is equipped to provide expert solutions tailored to your needs.
For more information about our wall tie replacement services or to discuss your next project, contact us today. Our experienced professionals are ready to assist you with reliable and effective restoration solutions.