HomesAndHedge guides
Identify and compare: is it this, or that?
The hardest part of a home or garden problem is often working out what you are actually looking at. These side-by-side guides help you tell common lookalikes apart: Japanese knotweed from harmless plants, one damp type from another, what is biting you, and whether holes in wood mean active woodworm.
Each guide opens with a clear answer, sets out a comparison table, and then explains the deciding signs in plain English. Where a problem can be costly or serious, we say so and point you to a specialist.
Frequently asked questions
Why does identifying the problem matter so much?
Because the fix, the cost and how worried to be all depend on which problem you actually have. Treating the wrong thing wastes money and leaves the real fault active, so confirming what you are looking at is the cheapest and most important first step.
Are these comparisons a substitute for a professional opinion?
No. They help you narrow it down and decide whether to act or get help, but for anything costly or potentially serious, such as suspected Japanese knotweed, structural damp or the rarer wood-boring beetles, confirm with a qualified specialist before spending.
How do I use these guides?
Start with the side-by-side table on each guide to narrow the candidates, then read the how-to-tell-them-apart detail for the deciding signs. Each guide links to the relevant problem page and its indicative cost, so you can move from identifying to acting.
Editor, HomesAndHedge
Oliver leads HomesAndHedge's editorial coverage of home and garden problems. He researches and writes the plain-English explainers on pests, invasive plants, damp and mould, drainage and wildlife, drawing on guidance from bodies such as the Property Care Association, the RHS and the NHS, and is clear about when a job needs a qualified professional.
Last reviewed: 8 June 2026