The timber matters more for a mud kitchen than for most garden projects, because children touch every surface with wet hands and sometimes put those hands in their mouths.
Don’t use: CCA-treated pine
CCA (copper chrome arsenic) treated pine is the old green-tinged treated timber. It contains arsenic. Australia’s chemical regulator, the APVMA, stopped CCA being used for new children’s play equipment, garden furniture, picnic tables, exterior seating and domestic decking handrails from 2006.
That means it’s no longer sold for those uses, but plenty is still around in old fences, retaining walls, sleepers and decking. Don’t reuse old treated pine for a mud kitchen, and don’t burn offcuts. If you don’t know what an old piece of timber is, leave it out.
Pallets: read the stamp
Pallets are marked with an international stamp. HT means heat-treated, the safe option. Skip pallets stamped MB (methyl bromide), pallets with no stamp, painted or coloured hire pallets, and any with stains or a chemical smell. See the pallet mud kitchen plan for how to use them.
Good choices
| Timber | Why it works | Watch for |
|---|---|---|
| Heat-treated pallets (HT stamp) | Free or cheap, easy to work | Softwood weathers; needs oiling and splinter checks |
| Untreated pine | Cheap, light, easy to cut | Rots outdoors without a good finish; keep off wet ground |
| Cypress pine | Naturally termite and rot resistant, Australian grown | Can be knotty; heavier than pine |
| Spotted gum, blackbutt, merbau and other durable hardwoods | Long-lasting, tough | Heavier and harder to cut; pre-drill screws |
| Modern H3 treated pine (not CCA) | Rot resistant, cheap | Ask which treatment it has; seal it |
| Bamboo or composite boards | Low maintenance | Check the product is rated for outdoor use |
Finishes
- Oil, not paint. Paint and varnish chip and peel into the mud. A penetrating oil soaks in and wears gradually.
- Look for labels saying the oil is suitable for children’s furniture or toys, or food-safe.
- Let it cure. Follow the drying time on the tin, usually a day or more, before children play.
- Re-oil each season, or whenever water stops beading on the surface.
Hardware
Use galvanised or stainless steel screws and hooks so they don’t rust and stain. Countersink screw heads so nothing sticks out, and round off every corner with sandpaper.
Questions people ask
Is H3 treated pine safe for a mud kitchen?
Modern H3 pine for above-ground outdoor use is usually treated with copper-based or LOSP preservatives rather than arsenic, and is widely used for garden furniture. Check the label or ask the store which treatment it has, avoid anything labelled CCA, and seal it. If you'd rather avoid treated timber altogether, use a naturally durable hardwood or cypress.
What oil should I use on a mud kitchen?
An outdoor timber oil labelled suitable for children's furniture or toys, or a food-safe oil. Raw linseed, tung oil and many decking oils work; check the product label for drying time and suitability. Avoid paints and varnishes that can peel into the mud.