resource hub | Timber resin repairs

Timber resin repairs


Why use them?


Taking on a refurbishment/conversion of an existing historic building can mean that you will have to abide by strict planning conditions due to graded listing or you will be working in a conservation area. The majority of these buildings will be either timber framed or use a large proportion of structural timber for roofing and flooring.


Environmentally, timber is an extremely valuable material therefore needs to be conserved where possible. Resin repairs allow builders to replace small, yet structurally critical sections of timber that have become rotten, infested or fractured; allowing the majority of the original material to be preserved.


What are they and what are they used for?


Resin repairs can be used to fix a wide range of defects, including decayed truss or beam ends, structural cracks (natural or induced). They are often unnoticeable when carried out correctly and help maintain the structural capacity of the timber or even improve it, whilst keeping waste to a minimum.  


The resins used are strong enough to act as both a replacement for the damaged timber and as an adhesive to bond on the reclaimed material of similar age and appearance. This method is now widely accepted now despite earlier scepticism regarding their durability.


The basic components of the majority of these repairs are:


  • Parent timber
  • Replacement timber
  • Reinforcing or connecting material
  • Epoxy resins


What are the benefits?


  • High versatility
  • Long shelf life
  • Low fire risk
  • Low odour
  • Wide usable temperature range
  • Low cure shrinkage
  • Excellent adhesion and toughness


More information:


Due to the importance of these type of repairs structurally and aesthetically, they should only be undertaken by specialist companies using a repair system that meets the requirements of regulation 7 of the Building regulations 2010. Chapter 2 in the Premier Guarantee Technical Manual states that all materials used in the construction of a housing unit shall be suitable and shall be used so as to fulfil their purpose with this requirement.


If used on roofs, the structure needs to be structurally sound in accordance with Chapter 7 of our Technical Manual and therefore comply with requirement A1 of the Building Regulations 2010.  


For more information see chapter 12 of our Technical Manual