01 · Deck vs. patio on flat, exposed ground
Three ways to answer the same underlying problem: shelter.
Timber deck
Best fitRaising a surface slightly off wet or uneven flat ground
CharacterCan incorporate built-in wind screening at deck edge
ConsiderStill needs genuine shelter design, not just elevation
Paved patio
Best fitSections with reliably dry, well-graded flat ground
CharacterLow-maintenance, durable surface for a cool climate
ConsiderNeeds falls and drainage designed in, since flat land won't self-correct
Sheltered courtyard hybrid
Best fitOpen sections where wind is the main barrier to use
CharacterCombines a hard surface with structural or planted screening
ConsiderScreening needs sequencing early to be effective by the time the surface is finished
02 · What shapes the decision here
Five Invercargill-specific factors beyond material preference.
Wind shelter above all
Open flat sites can be exposed for long periods, and shelter — built or planted — is usually the single factor that decides whether a deck or patio gets used regularly.
North-facing sun
Orienting a surface to capture available north-facing sun matters more in a cool climate, where every degree of shelter and warmth extends a short outdoor season.
Weather protection and shoulder-season use
Shelter and weather protection can extend a short shoulder season meaningfully — a roofed or well-screened space earns use in months an open one simply won't.
Falls on flat ground
A patio on genuinely flat ground needs a deliberately engineered fall, since there's no natural slope to rely on for surface drainage.
Access around existing structures
Established planting and rear garages common on broad Invercargill sections can mean the most sheltered corner isn't the most convenient one to build in or reach with materials.
03 · Cost drivers on flat, wind-exposed ground
Screening and fall design, not surface finish, usually set the price.
04 · A worked outdoor-surface brief
A sheltered patio in Gladstone.
A sheltered patio in Gladstone
A Gladstone section has flat, usable ground directly behind the house, but the space currently sits unused most of the year because it catches the prevailing wind across its full width with no existing shelter. Rather than simply paving the area as it stands, the brief repositions the patio slightly to capture better north-facing sun and adds a screen along the exposed boundary, sequenced to be built before the paving so the space is usable as soon as the surface is finished. An engineered fall is built into the paving since the ground itself is flat, directing surface water to a defined discharge point rather than leaving it to find its own way. The result is a modest surface, but one designed to actually extend into the shoulder seasons rather than one used only on the handful of calm summer days. A small awning is added over the section closest to the house as a second stage, extending shelter further for years when even the screened area still feels exposed.
05 · Before comparing quotes
Confirm scope is genuinely comparable.
- Confirm wind exposure has been assessed for the specific spot, not just the general section, and that shelter is priced accordingly.
- Ask whether an engineered fall is included in flat paving, since level ground won't drain itself.
- Check whether roofing or weather protection is in scope if shoulder-season use matters to you.
- Confirm the surface location has been chosen for sun and shelter, not just convenience to the back door.
Sources & methodology
Designed to show its working.
Deck and patio consent requirements vary by site and are set by Invercargill City Council. Confirm structural and consent requirements for the specific property with a licensed building practitioner.