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Trellises & Arches

Decorative garden frameworks for climbing plants and features

Trellises and arches are garden structures used to support climbing plants, create visual interest, and define spaces. They come in timber, metal, or composite materials, and can be wall-mounted, freestanding, or arch-style for pathways.

Common Damage

1. Timber Rot & Decay

  • Especially at ground contact points
  • Warping, cracking, or splitting from sun and moisture

2. Loose Joints

  • Broken lattice slats
  • Fungal growth and insect damage

3. Metal Corrosion

  • Rust and corrosion, especially untreated steel
  • Paint flaking leading to exposure

4. Wind & Load Damage

  • Strong winds loosening posts or toppling arches
  • Heavy climbing plants causing sagging or collapse

5. Plant-Related Issues

  • Overgrown climbers pulling structures out of shape
  • Moisture trapped by dense foliage accelerating rot

Repairs

minor Repairs

  • Treat wood with preservative or paint every 1–2 years
  • Check fixings, screws, and joints for looseness
  • Prune plants to reduce excessive weight

moderate Repairs

  • Replace broken slats or lattice sections
  • Re-secure loose joints with screws or brackets
  • Treat and sand back rust on metal, then repaint

major Repairs

  • Re-anchor posts using concrete or metal spikes
  • Partial or full timber replacement if rot is extensive
  • Complete structure replacement

New Installation

When Replacement Is Needed

  • Adding climbing plant support
  • Creating garden features or pathways
  • Replacing damaged structures

Installation Steps

  1. Choose Type

    • Flat wall trellis, freestanding screens, or garden arches
  2. Select Material

    • Timber (natural look), metal (durable), or composite (low maintenance)
  3. Prepare Base

    • Concrete or metal spike anchoring for posts
  4. Install Structure

    • Secure fixing to wall, fence, or ground
  5. Plant Climbers

    • Suitable climbing plants trained onto structure

Lifespan

Treated timber
5–15 years
Metal (steel/aluminium)
15–25+ years
Composite/PVC
20+ years

Warning Signs

  • Structure leaning or unstable
  • Visible rot or rust
  • Slats or lattice broken
  • Plants pulling structure out of shape

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