Ochtendflits

Buying wood at Gamma, Karwei, or Hornbach is one of those tasks that looks simple until you meet a wall of nearly identical boards. The useful thing to learn is not twenty tree species. It is a small vocabulary, four reliable defaults, and what the label does — and does not — promise.

The four materials to start with

For most first projects, these cover almost everything:

The practical shorthand is: use vuren for basic indoor construction; multiplex for flat indoor furniture; geïmpregneerd grenen or Douglas outdoors; and explicitly exterior-rated multiplex for outdoor panels.

These are defaults, not guarantees. Gamma describes Douglas, grenen, and vuren as softwoods that all need appropriate protection outdoors; Douglas has better natural weather resistance, but still needs treatment when it touches the ground. Its timber guide is a useful current shop-level reference.

The words that matter in store

The key distinction is easy to miss: plank, balk, and lat describe a shape; vuren, grenen, and Douglas describe the wood; geschaafd and geïmpregneerd describe treatment or finish. One label can contain all of them: geïmpregneerde grenen regel, geschaafd.

Dutch sizes versus American 2×4s

Americans often name framing timber by old inch labels such as “2×4.” Dutch shops use finished metric dimensions in millimetres. A US 2×4 is usually about 38 × 89 mm after planing; the nearest common Dutch size is 44 × 94 mm.

Ask for a vuren regel van 44 bij 94 millimeter rather than searching for “2×4.” The store may also stock nearby sizes, so use the table as a translation aid, not an engineering specification.

Thickness and strength

A species name is not enough to choose timber. A 16 mm shelf and a 28 mm shelf behave very differently; a narrow board is not automatically weaker than a wider one, and a board used on edge is far stiffer than the same board laid flat.

For non-structural work, start by asking: how far is the unsupported span, what will it carry, and where will the screws go? A small book shelf, a desk top, a raised bed, and a load-bearing wall all need different answers. Do not use a simple guide like this to size load-bearing work: ask a qualified builder or structural professional.

Panels: similar names, very different jobs

Multiplex is plywood: layers of veneer glued together. It is strong, screws well, and is a good default for shelves, cabinets, and furniture. The exposed edges need particular care around moisture. For a painted exterior multiplex product, follow the maker's instructions: Hornbach, for example, specifies sealing the edges of its PaintPlex panels because moisture is their weak point. Read the processing guide.

MDF (medium-density fibreboard) is smooth and cheap, which makes it popular for painted indoor furniture, skirting, and decorative panels. Ordinary MDF is not outdoor material. “Painted” is not the same thing as weatherproof.

Underlayment is a rougher, construction-oriented plywood panel, often used for floors, roofs, and utility work. It is strong and economical but not a ready-made furniture finish.

OSB is the recognisable panel made from large compressed wood flakes. It is useful for sheathing and rough construction, but its surface is an intentional look rather than a substitute for finished plywood.

Words such as watervast verlijmd (“made with water-resistant glue”) matter, but do not read them as “leave this unprotected outside forever.” Check whether the exact panel is labelled for exterior use, and protect cut edges.

Outdoor wood: the part people get wrong

Rain is not the whole problem. Wood lasts longer outside when water can drain away and air can circulate. Avoid sitting an untreated end grain directly on soil, concrete that stays wet, or a surface that traps water. Use appropriate exterior screws so the fixings do not become the first point of failure.

RVS stands for roestvast staal — the Dutch term for stainless steel. For ordinary outdoor projects, RVS A2 is the usual choice. Near the coast, around a pool, or where salt or chlorine is present, choose the more corrosion-resistant RVS A4 instead. With dense hardwood, pre-drill to reduce the risk of splitting the timber or snapping a screw. Würth's fastening guide gives the same A2/A4 distinction.

Paint, stain, or oil can help suitable timber, but none of them turns ordinary MDF into good outdoor material. Treating geïmpregneerd timber can improve its lifespan; it does not make it automatically suitable for every structural job. For choosing between paint, stain, and oil, see Verf.

Let the shop cut panels

The zaagservice is one of the best ways to make a first furniture project less intimidating. Bring a cutting list in millimetres and ask: “Kunnen jullie deze plaat op maat zagen?” (“Can you cut this panel to size?”)

At Gamma, the in-store service cuts sheet materials, not impregnated garden timber; it only cuts material bought there, and cut material cannot be returned. Its current zaagservice conditions also distinguish this basic straight-cut service from online made-to-measure work. Check your own branch before planning a complex cut list.

A few useful phrases

• Ik zoek vuren regels van 44 bij 69 millimeter. — I am looking for spruce framing timber, 44 by 69 mm.
• Is deze multiplex geschikt voor buiten? — Is this plywood suitable for outdoors?
• Is dit geïmpregneerd? — Is this preservative-treated?
• Kunnen jullie deze plaat op maat zagen? — Can you cut this panel to size?
• Welke schroeven heb ik hiervoor nodig? — Which screws do I need for this?
• Ik wil een plank aan een betonnen muur ophangen. — I want to hang a shelf on a concrete wall.

For the wider Dutch DIY culture — what is safe to do yourself, what to leave to professionals, and the rest of the store vocabulary — see Klussen.