Bedlam Bridge

Validus Construction Ltd was commissioned by PBS NE Ltd to undertake specialist masonry repairs on Bedlam Bridge, a historic stone structure located in Harrogate. The aim was to restore and preserve the bridge’s downstream parapets and spandrel walls while maintaining its original architectural character and structural integrity.

The project began with the careful dismantling of affected masonry down to sound stone levels. All salvageable stone was reclaimed and reused during reconstruction. New matching stone was sourced to replace any shortfall. A 1:1:6 mortar mix (cement : lime : sand) was used to rebed and point the masonry, ensuring both durability and aesthetic alignment with the existing structure.

Despite the tight three-week programme, the project was delivered on time and with high standards of craftsmanship, fully meeting client expectations.

The specialist team began by carefully dismantling the downstream parapets and spandrel sections of the bridge. Each stone was systematically catalogued and stored to facilitate accurate reconstruction. This method protected the integrity of the original stonework while allowing for precise rebuilding.

Where stones were too deteriorated to be reused, new matching stone was supplied. Texture and colour were meticulously matched to blend seamlessly with the existing historic masonry, maintaining the visual continuity of the structure.

Once dismantling was complete and materials prepared, the team proceeded with reconstruction using reclaimed and new stone. All masonry was rebedded and pointed using a traditional 1:1:6 mortar mix. This blend was selected for its structural strength, visual consistency, and breathability, making it highly compatible with heritage stonework.

The mortar not only reinforced the structural joints but also allowed the bridge to manage moisture naturally—an essential characteristic for long-term preservation.

Working on a heritage bridge required a highly controlled and sensitive approach:

  • Structural protection during dismantling was critical to avoid destabilising other sections of the bridge. Temporary support and phased takedown sequences were used.

  • Stone sourcing was a challenge due to the need for exact matches in appearance and density. Skilled suppliers and testing protocols ensured precise matching.

  • Tight scheduling required efficient execution. The team remained on track through careful planning, experienced labour, and seamless coordination with the client.

The Bedlam Bridge restoration was completed on schedule, within the allocated three-week programme, and to the complete satisfaction of the client. The bridge now benefits from:

  • Restored historic masonry, retaining its original design language.

  • Improved structural integrity, ensuring long-term functionality.

  • Enhanced aesthetic value, with no visual disparity between old and new stonework.

  • Minimal environmental impact, through reuse of original materials where possible.

This project highlights Validus Construction’s capability in delivering complex conservation works under tight timelines while respecting and preserving historic infrastructure.