UNGALVANISED STEEL
When a poorly protected steel connecting bolt is exposed to the weather it will tend to corrode.  Often, the expansion of the corrosion will damage the timber structure, necessitating replacement of the damaged elements.  The steel in the connector will also be consumed, reducing its ability to support the applied loads.  Richard Cortis can advise on appropriate measures to reduce corrosion damage in connections.
ROTTEN TIMBER
When timber decks and pergolas are poorly detailed and constructed, or when inappropriate timber species are used, there is often severe rot deterioration at connections, end grains and places where water tends to remain after cessation of rainfall or after plant watering etc.  Richard Cortis can advise on remedial works to rectify rot damage and extend the durable service life of the structure.
UNSTABLE GROUND
Geotechnical problems can cause building movement. If there is building movement, a detailed geotechnical investigation is recommended before attempting remedial works.
DIFFICULT BUILDING SITES
Buildings on difficult sites with difficult access will be more costly to maintain than buildings on sites with easy access
SEASIDE STRUCTURES
Structures close to the sea will have specific maintenance issues
TEMPORARY ACCESS
It is necessary to provide temporary access during remedial works and the cost can be significant
COMPATIBLE MATERIALS
When structures are repaired, some attempt should be made to match the existing material
MARINE STRUCTURES
Marine structures tend to suffer deterioration in the inter-tidal zone and the splash zone