About Us

Stronghold Preservation has nearly 30 years successful trading experience working on some of the most prestigious historical buildings and structures in Northern Ireland and the Republic of Ireland such as Dunluce Castle, Carrickfergus Castle and Malahide Castle to name a few. More recently the company has worked on unique projects in England and Scotland, such as Claridges Luxury Hotel in London. 

Cintec Anchors at Dunluce Castle NI


As a specialist company involved in Preservation, Waterproofing and Structural Repair, Stronghold focus on;

  • Damp Proofing, Wood Rot and Woodworm Treatments
  • Structural Timber Repairs using the Timber Resin Splice method
  • Bird Guano Removal and Bird Control
  • Replacement Wall Ties for Wall Tie Corrosion
  • Helical Crack Stitching of Masonry Cracks
  • Cintec Sock Anchors for Structural Anchoring and Repairs
  • Discreet Masonry Consolidation Netting for Facades 
  • Subsidence: Helical Shire Piles
  • Lateral Restraint Ties for Bulging and Leaning Walls
  • Structural and Concrete Repairs using Rope Access Techniques
  • Waterproofing of Basements: New Build & Existing
  • Leak Sealing; Concrete Crack Injection & Service Duct Sealing

Stronghold Preservation can take on all or part of the survey and design solution, and work closely with Clients, Contractors, Architects and Engineers to provide individual solutions, survey reports and design specifications. 


Stronghold Preservation has worked closely with leading product and system manufacturers, with the aim to develop a range of services and repair methods that are discreet or aestheticly pleasing, which maintain the historical integrity, increase the lifespan of the building or structure, are cost effective and minimise the disturbance to the fabric of the building. 

Training is an important part of the close links that Stronghold Preservation has with it's suppliers, leading to Approved Contractor status for the following companies:

  • Cintec International 
  • John Newton & Co 
  • Wykamol Group
  • Thor Helical
  • MC Chemicals 


The company is committed to excellence and as a result, have a proven track record on prestigious projects across the UK and Ireland.

All Stronghold surveyors complete the industry recognised Certificated Surveyor in Remedial Treatments training course, enabling them to be proficient in identifying types of damp, fungal decay and woodboring insect infestations. Specialising in the design of basement waterproofing, Stronghold's basement experts complete the Certificated Surveyor in Structural Waterproofing training course, which along with the help of specialist suppliers provides the knowledge and expertise to offer clients waterproofing designs. Structural repair specialists within Stronghold Preservation will have completed training in the the repair methods used, along with a wealth of practical experience in the surveying of structural defects. Specialist structural engineers are employed by Stronghold for indemnified structural repair advice and designs. 

Every key project is assigned to an experienced surveyor with a minimum of 5-10 years experience who has completed the relevant training, to provide and maintain the highest possible standards and workmanship that our clients deserve and expect. Stronghold will also endeavour to assign a senior site operative for the duration of key projects. All operatives receive relevant health and safety training and are CSR (Construction Skills Register) card holders.