Excerpt: When an oak frame starts to decay, the repair method you choose can determine the building’s future. Discover why we use traditional mortise and tenon repairs instead of modern steel plates.

The skeleton of many historic British homes is the timber frame. Usually crafted from slow-grown oak, these frames are incredibly durable, often lasting for centuries. However, even the strongest oak is susceptible to the elements over time, particularly water ingress and the infamous Deathwatch beetle.

When a homeowner discovers rot in a beam or a post, the immediate instinct might be to bolt a steel plate over it or cut out the rot and fill it with cement. Unfortunately, these “quick fixes” often cause more damage than the original problem.

The Problem with Steel and Cement Steel plates trap moisture between the metal and the wood, accelerating the rot you were trying to fix. Furthermore, as the timber expands and contracts with the seasons, rigid steel bolts can cause the wood to split.

The Traditional Solution: Mortise and Tenon At Morris & Hughes, we believe in repairing “like for like.” When a section of timber fails, we don’t just patch it; we splice in new, air-dried oak using traditional carpentry joints.

The most common technique we use is the Scarf Joint or Mortise and Tenon.

1. Structural Integrity: These joints lock the new timber to the old, restoring the structural strength of the frame without relying on metal bolts.
2. Aesthetics: A well-executed timber repair should be almost invisible. By matching the grain and using traditional tools, the repair blends seamlessly with the history of the house.
3. Longevity: Because we use oak that matches the moisture content of the existing frame, the repair moves and breathes with the building.

Restoring a timber frame is about more than just construction; it is about preserving a piece of history. If you suspect your timber frame needs attention, it is vital to act before the structural damage spreads.

Need an expert assessment of your timber frame? Get in touch with our team today.