Carpentry and joinery are two halves of the same woodworking trade. Joinery is the making of timber components — doors, windows, staircases and cabinets — usually in a workshop. Carpentry is the fixing and constructing of timber on site, from roof structures and floor joists to fitting those joinery-made components into place. The simplest way to remember it: a joiner makes, a carpenter installs, and plenty of tradespeople do both.
What is the difference between carpentry and joinery?
The distinction comes down to where the work happens and what it produces. A joiner works mainly at a bench in a workshop, cutting and assembling timber into finished items using machinery and hand tools. The term "joinery" itself refers to the joining of wood, traditionally without nails, using techniques like mortise and tenon (a peg-and-socket joint) or dovetails (interlocking wedge-shaped pins).
A carpenter works on the building itself. The job is structural and practical: erecting frameworks, laying floors, hanging doors and fixing skirting. Carpenters cut timber to suit a particular space rather than producing standalone pieces. Both trades share the same raw material and many of the same skills, which is why the line between them is often blurred in everyday use.
In Scotland and northern England the word "joiner" is frequently used to describe what people elsewhere call a carpenter, so the labels are not always reliable. What matters in practice is the specific task: whether you need something made to measure or something fitted in place.
Where bench joinery ends and site carpentry begins
Carpentry and joinery are two halves of the same woodworking trade.
Bench joinery is the controlled, workshop side of the trade. Working indoors with stationary machinery, a bench joiner can achieve fine tolerances and clean finishes that are hard to match on a draughty building site. This is where bespoke timber work is produced — items cut and shaped to a precise drawing or measurement.
Site carpentry takes over once those components leave the workshop, or where structural timber is needed that was never going to be pre-made. A site carpenter deals with the realities of an actual building: walls that are not quite square, floors that slope, and openings that need scribing to fit. The skill lies in adapting prepared materials to imperfect conditions.
The handover point is roughly this. A bench joiner builds a staircase or a run of fitted wardrobes; a site carpenter installs them, packs and levels them, and finishes the joints to the surrounding surfaces. Many firms cover both sides, with the same person making an item one week and fitting it the next.
The main jobs each discipline covers
The spread of work is wide, and the two disciplines overlap at several points. Below is a rough guide to what each typically handles.
Site carpentry commonly includes:
- First fix — the structural and hidden work done before plastering, such as floor joists, stud partitions, roof timbers and door linings.
- Second fix — the visible finishing work after plastering, including hanging doors, fitting skirting boards, architraves and built-in storage.
- Roof carpentry — cutting and erecting rafters on site, or fixing prefabricated roof trusses delivered ready-made.
- Structural timber — timber frames, decking subframes and supporting woodwork.
Bench joinery commonly includes:
- Doors and windows — made to size, including hardwood entrance doors and traditional sash windows.
- Staircases — cut and assembled to fit a specific rise and going, then delivered for fitting.
- Fitted furniture — wardrobes, alcove units, bookcases and kitchen cabinetry.
- Mouldings and trims — bespoke skirting, architrave and panelling profiles that are not available off the shelf.
If you are unsure which trade a job needs, a useful question to ask a tradesperson is whether the item will be made in a workshop or built on site. Their answer usually tells you where their main skills lie.
Choosing softwood, hardwood or engineered timber
The timber chosen affects cost, durability and appearance, and the right pick depends on where the wood will sit and how hard it must work. There are three broad categories.
Softwood comes from coniferous trees such as pine, spruce and larch. It is the most widely used timber in construction because it is affordable, easy to work and quick to grow. Most structural carpentry — joists, studwork, roof timbers — uses softwood, often pressure-treated to resist rot where it may get damp. Painted internal joinery like skirting and door linings is frequently softwood too.
Hardwood comes from broadleaved trees such as oak, ash, beech and walnut. It is generally denser, more durable and more expensive than softwood, with grain and colour that many people prefer to leave on show. Hardwood suits items that take wear or are meant to last and look good, such as solid doors, quality staircases, worktops and furniture. Some hardwoods, like oak, also stand up well outdoors.
Engineered timber is made by bonding layers or strands of wood together. This includes plywood, MDF (medium-density fibreboard) and laminated beams. Engineering the timber removes much of the movement and warping that solid wood can suffer, so it stays stable across changes in temperature and humidity. Engineered products are common in fitted furniture, flooring and large structural spans where a single solid piece would be impractical or costly.
In many projects all three appear together: softwood for the hidden structure, engineered board for the carcass of fitted units, and a hardwood facing or trim where it will be seen. A joiner or carpenter should be able to explain why a particular timber is suited to each part of the job, and it is reasonable to ask how any external or damp-exposed wood will be protected.