Outdoor Kitchen Frame
A timber frame for an outdoor kitchen — barbecue surround, prep counter and storage. Built to host stainless or stone surfaces, with cladding choices that survive heat, weather and the occasional spill.
What you'll need
Materials
- Frame timber (47×95mm minimum), cladding boards, worktop substrate (cement board or marine ply), worktop surface (stone, stainless or concrete), stainless screws, masonry bolts if anchoring, optional insulation around the BBQ cutout.
Tools
- Impact driver, mitre or circular saw, spirit level, tape measure, square, drill/driver with masonry bit if anchoring to slab, clamps.
Material complexity: High
Allow 12% on cladding boards plus a full spare frame length. Worktop cuts are unforgiving — measure twice.
Main risk: Cladding too close to direct heat or under-spec'd worktop substrate — visible failure within a year or two of regular use.
Tips & traps
- Cladding too close to direct heat — chars within a season.
- Wrong substrate under heavy worktops (chipboard, OSB) — sags and fails.
- No drip-stop between worktop and cladding — water tracks into the frame.
- BBQ cutout sized wrong — discovered AFTER cladding is fitted.
- Generic zinc screws that rust and stain.
Planning & timber detail
Why build this?
An outdoor kitchen transforms how you use the garden in summer. A properly built timber frame with the right substrate and finishes turns a £600 BBQ into the centrepiece of a permanent outdoor cooking zone. Done well it adds real property value; done poorly it looks tired within two seasons.
Where it works best
Covered or partly sheltered position — open patio works but reduces lifespan. On a level concrete or stone slab, never directly on grass or soil.
Planning notes
Decide BBQ model BEFORE building — cutout dimensions vary significantly. Plan for gas/electric supply if needed; running these later is much harder. Allow at least 200mm of fire-resistant clearance around any heat source.
Typical sizes
A standard 2400×600mm L-shaped kitchen with BBQ cutout and prep section uses roughly 35m of frame stock and 8m² of cladding. Worktop height 900mm is comfortable for most adults; tall users may prefer 1000mm.
Suitable timber options
Treated redwood for the budget build with regular re-oiling. Cedar for the longest-life finish with minimal upkeep. Thermowood for dimensional stability around the heat-exposed sections.
Fixing and finishing
Stainless throughout. The worktop area gets cleaned with water and detergent regularly — anything that rusts will bleed onto cladding.
Use cement-board substrate under stone or concrete worktops — marine ply is fine under stainless. Cap exposed timber edges with stainless or aluminium trim where they meet the worktop to stop water tracking down into the frame.
Maintenance
Wipe down the worktop after each use. Re-oil cladding annually if you want to maintain colour. Check fixings near the heat source every spring for fatigue.
Re-seal stone or concrete worktops annually. Replace cladding boards individually if they char or stain badly.
Timber behaviour
Durability
UC3 cladding minimum; UC4 if any timber touches the ground or wet patio. Use cement board (not timber) for any internal surface within 100mm of a heat source.
Movement
Heat cycles around BBQ areas cause more movement than weather alone. Use shorter cladding pieces around the BBQ (less length, less to move) and allow generous expansion gaps.
Go deeper
Get the Timber Buying Companion
An 8-page practical guide to choosing better boards, avoiding waste and spotting common timber problems before you buy.