The short answer
There's usually no difference: 'lap panel' and 'overlap panel' are two names for the same thing – a panel made of thin horizontal slats that overlap each other inside a timber frame. The real differences are between waney edge (bark-edged) and straight-cut slats, and between lap panels and stronger styles such as tongue and groove or closeboard.
Overlap panels are the most common fence panels in the UK. They're cheap, light and easy to fit. 'Lap' is just a shortened version of 'overlap', and 'waney lap' or 'waney edge' describes slats with a natural wavy edge.
Lap and overlap: the same panel
Each slat overlaps the one below by a few centimetres, shedding rain like roof tiles. The slats are stapled or nailed to a frame. Most are 1.83m wide and come in heights from 0.9m to 1.8m.
Waney edge vs straight cut
Waney edge slats keep the natural wavy profile of the tree, giving a rustic look. Straight-cut or 'square lap' slats are cut straight for a neater appearance. Both are built the same way.
Lap panels vs tongue and groove
Tongue and groove panels have slats that slot into each other, leaving no gaps. They're stronger, more private and look smarter, but cost more. Lap panels can develop small gaps as the timber shrinks.
Lap panels vs closeboard
Closeboard panels (or closeboard fences built on site) use vertical feather edge boards on rails. They're much stronger than lap panels. See feather edge vs closeboard fencing.
- Lap/overlap – cheapest, lightest, least durable
- Tongue and groove – no gaps, smarter, mid-price
- Closeboard – strongest, best in wind, longest-lasting
- Slatted – modern look, lets light through
Which to choose
Lap panels suit sheltered gardens and tight budgets. In exposed gardens, or if you want the fence to last, step up to tongue and groove or closeboard – see wind-resistant fencing. Get quotes for fence panels from local installers.