Oak internal doors
Oak internal doors come two ways. Engineered doors carry a real oak veneer over a stabilised core, so they hang straight and stay straight. Solid oak is cut from the timber itself and moves with the seasons. Both are sold unfinished for you to finish, or ready-finished to hang straight away.
Oak is the default answer when someone wants their doors to look like timber rather than like paint, and it is the finish most people picture when they say they want wooden doors. What almost nobody is told at the point of buying is that two very different products are sold under the same word.
Grain, colour and figure vary from leaf to leaf. That is oak behaving normally, not a fault, and it is the reason a set of oak doors bought together looks more deliberate than the same doors bought one at a time over a year.
Showing all 3 doors
Prices are guide prices including VAT, taken from the smallest size and plainest finish of each door. They are not an offer to sell — confirm the price for your size and finish before ordering.
Oak 4-Panel Internal Door
A traditional four-panel oak door with raised mouldings — the default choice for Victorian and Edwardian houses, and the one most people picture when they say "oak door".
- Engineered oak
- 35mm
Guide price from£106.80inc VAT11 sizesOak Glazed 3-Light Door
Three glazed lights in an oak frame — for borrowing daylight from a hallway into a room that has none of its own.
- Engineered oak
- 35mm
Guide price from£150inc VAT7 sizesOak Cottage Ledged Door
Vertical boards with ledges across the back — a genuine cottage door for period properties, where a moulded panel door would look wrong.
- Solid oak
- 35mm
Guide price from£198inc VAT4 sizes
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Engineered oak or solid oak?
Most oak doors sold in the UK are engineered. The word makes them sound like the compromise option, and for stability they are the opposite.
| Engineered oak | Solid oak | |
|---|---|---|
| Construction | Oak veneer over a laminated, stabilised core | Solid oak boards or staves |
| Movement | Very little — the core resists twist and cupping | Expands and contracts with humidity through the year |
| Gaps to allow | Standard gaps around the leaf | A slightly more generous gap, particularly at the top and the closing edge |
| Trimming | Limited by veneer thickness on the edges | More forgiving, but still limited by the manufacturer |
| Typical cost | Lower | Higher |
| Best for | Most houses, and anywhere with underfloor heating or big humidity swings | Period properties where the honesty of solid timber matters |
Finishing an oak door
An unfinished oak door is not a finished product. It is raw timber that will drink moisture out of the air until you seal it, and an unsealed door in a new plastered room is the classic way to end up with a leaf that no longer fits its frame.
Seal every face and every edge, including the top and the bottom. The top edge is the one that gets forgotten, because nobody can see it once the door is hung, and it is usually the edge the manufacturer names in its guarantee conditions. Check the finishing instructions supplied with the door before you open a tin.
- Hang the door dry first, mark and trim to fit, then take it back off.
- Sand lightly along the grain and remove all dust.
- Seal all six surfaces — both faces, both long edges, the top and the bottom.
- Build up the coats the manufacturer asks for, sanding between them.
- Only fit ironmongery once the finish has properly cured.
Matching oak doors across a house
Oak varies by batch. If you are doing a landing or a whole floor, order the doors together and finish them together with the same product from the same tin. Doors bought six months apart and oiled with whatever was left in the shed will read as two different sets, and there is no fixing that afterwards short of stripping them.