Guarding and steps are where a deck becomes something you can trust with children, a wet evening, or a slope you did not notice from the kitchen.
When a rail is needed
A deck that is barely above the garden may need nothing more than a tidy edge. A deck with a real drop needs a guard. Building Regulations look for guarding where the difference in levels is more than 600 mm. We use that as the prompt, and we still talk about a rail on a smaller drop if the edge is awkward, especially over concrete.
The guard has to be high enough for an external edge. We follow the figure the regulations ask for, commonly 1100 mm to the top of the rail on an outside balcony-type edge, and we set it on site rather than by eye. Spindles or glass are spaced so a child cannot slip through. A 100 mm gap is the usual test we build to. Wider than that and we close it.
The rail is fixed to the frame or to posts that go somewhere solid. Screwing a decorative piece only to the board ends is not guarding. If the deck itself is over the planning line, the rail is part of that design, not a later extra.
Glass keeps the trees in view. Metal spindles take knocks. Timber suits a planted edge. An open Wynyard plot can still lean on a glass panel, so we post it properly.
Steps between levels
Steps should feel boring. Even rises, a consistent going, and a landing where you can pause. A last step that is suddenly taller is how people trip, especially when the lower ground is a concrete yard with a lip.
We do not hang a stair off the fascia and hope. Strings and posts carry it. The bottom sits on something that will not sink. On soft ground that means a pad. On sound concrete it means a bearing the concrete can take.
A handrail goes on when the flight needs it. Short, wide steps into a lawn may not. A longer flight down a Wynyard slope does. We decide from the drop, not from a picture.
A light on the step does not change the application. It does show the nosing after dark. Deck lighting covers glare.
Wynyard slopes and open edges
Wynyard is where this page earns its keep. Plots are large and some fall towards woodland. A deck at door level can be a storey above the soil at the trees, in feeling if not in fact. That edge gets a guard. The steps down are designed, not left as a scramble.
The planning test still sits beside the safety test. Past 30 cm of clearance between the walking surface and the ground, we expect an application. A guard does not remove that test, and passing the test does not remove the guard if the drop is serious. We keep the two lines in the notes so they are not blended into one vague warning.
Concrete yards in town are the lower, harder version. The drop may be one step, but the landing is unforgiving. We finish the nosing so it is visible, and we do not leave a proud lip hidden under the last board. The concrete guide deals with the surface. This page is the edge.
Near the river, a rail must not become a dam. We do not board the underside solid on low ground. The flood water guide explains the open frame. A guard can still look complete from above.
A quote that includes the rail
The quote names the rail type, the height we are working to, and the steps, with the number of rises we expect from the level. It says whether the 30 cm line is crossed. It includes posts and pads for the flight. A figure that says "steps extra" without a look is not one of ours.
Ask for a quote and mention the drop, even roughly. "It falls away towards the trees" is enough to start. We bring a level. Composite or timber, the rail is judged the same way. The board does not make a fall safer.
Questions we get asked about guarding
Is 30 cm the same rule as the rail height?
No. Thirty centimetres is the planning clearance between the deck and the ground. The rail height is a safety measure on the drop from the surface you walk on. A low deck can still want a small edge detail. A higher deck wants a real guard. We quote them as two checks.
Do you use glass at Wynyard?
Yes, if you want the trees in view and the posts are up to the panel. Metal spindles are better if footballs and bikes live on the deck. Timber is the softer look. All three are only as good as the posts. We do not hang glass from the board ends.
Can steps land on the concrete yard?
Yes, if the concrete is stable. The last rise should match the others. A random lip is planed out of the design, not left as a surprise. If the concrete is failing, the step gets its own pad.
What gap do you leave in the rail?
We build so a 100 mm sphere would not pass. That is the usual child-safety test. Wider decorative gaps are the thing we will not copy from a photo. The quote states the balustrade type so this is not a surprise on site.