A serving hatch is the signature of a bar shed: the flap lifts, the light comes on and suddenly it's open for business. Cutting one into an existing building is a structural change, though, not just a hole with hinges.
Check the wall first
Walls in garden buildings are held square by their framing. Removing cladding and studs weakens the wall unless you replace that support. Before cutting:
- Find the frame members and where they run.
- Check the wall carries no extra load from roof purlins or shelving.
- Decide whether the building is sound enough to convert at all; see converting a shed into a bar.
Frame the opening
A hatch needs a proper frame around it, with a header across the top to carry the load that the cut studs used to take, and support at each side. Fix the cladding back to this frame so it cannot flap or split. If you are not confident with timber framing, this is a good stage to bring in a carpenter.
Make it shed water
- A sill that slopes outward so rain runs away from the wall.
- A drip groove or edge on the underside of the sill.
- A canopy or overhang above to keep driving rain off the counter.
- Sealed edges where the frame meets the cladding.
Choosing a flap
- Top-hinged lift-up flap: acts as a canopy when open. Needs strong stays and should never rely on someone holding it.
- Side-hinged shutters: easy to open and secure.
- Sliding window or panel: keeps weather out when closed and lets light in.
- Drop-down flap that becomes a counter: neat, but needs firm supports.
Use stays rated for the weight and wind. A flap that slams shut on hands is a real risk.
Counter at the hatch
The hatch sill often becomes a counter. Size it for standing guests and serving. See counter height and bar top materials.
Security
The hatch is now the weakest point of the building. Fit internal bolts or locking bars, use security screws on hinges and avoid hinges that can be unscrewed from outside. See garden bar security.
Planning
A serving hatch rarely changes planning on its own, but adding a canopy may change the building's footprint or height. Check the planning starting point if you are close to limits.
Mark the opening with masking tape on the inside wall, check where the frame runs and adjust the size to suit the studs. Work with the frame, not against it.