Who this guide is for
- Homeowners laying or replacing a patio
- People concerned about pooling water or lifting slabs
- Anyone comparing patio contractors and paving materials
- Owners who want a patio that lasts
Probe base preparation
A patio is only as good as its base, so the sub-base and bedding decide whether it stays level. Ask how the contractor prepares the base for your ground and the paving you have chosen.
Slabs laid on a poor base sink, rock and lift.
- Ask how the base is prepared
- Discuss the sub-base for your ground
- Avoid surface-only quotes
- Match preparation to the paving
Confirm drainage falls
A patio must fall away from the house so water runs off rather than pooling or draining toward the building. Ask how they set the falls and where water goes.
Getting falls wrong causes pooling and can direct water at the house.
- Ask how falls are set
- Confirm water falls away from the house
- Discuss where runoff goes
- Treat drainage as central
Judge paving experience and finish
Neat jointing, consistent gaps and clean cuts mark a skilled paver. Look at past patios for how the paving is laid and finished, especially around edges and obstacles.
Confirm experience with your chosen paving material.
- View past patios for jointing and cuts
- Check edges and obstacle detailing
- Confirm experience with your material
- Discuss how joints are finished
Check edging and transitions
Strong edges and clean transitions to lawn, steps or the house keep a patio from spreading and looking unfinished. Ask how they edge the patio and handle level changes.
Edges and steps are common weak points.
Brief and compare on the same scope
Give each contractor the same brief and confirm what is included — base, drainage, paving, edging — so quotes compare. Ask what could change once they break ground.
Confirm insurance and relevant experience.
Hiring checklist
- 1Choose your paving material and patio size
- 2Ask how the base is prepared
- 3Discuss the sub-base for your ground
- 4Ask how drainage falls are set
- 5Confirm water falls away from the house
- 6View past patios for jointing and cuts
- 7Confirm experience with your material
- 8Ask how the patio is edged
- 9Give each contractor the same brief
- 10Confirm insurance and relevant experience
Common mistakes to avoid
- Accepting a surface-only quote with no base detail
- Letting the patio fall toward the house
- Ignoring where runoff actually goes
- Overlooking edging and level-change detailing
- Comparing quotes that differ on base and drainage
- Skipping insurance and experience checks
When to involve a professional
- Treat patio drainage and falls as work to plan carefully, away from the house
- Confirm the base suits the ground and paving
- Ask to see comparable patios that have stayed level
- Ask to see relevant insurance for the work
- Remember drainage and surface requirements vary by location and project
Frequently asked questions
Questions readers ask about this topic
Why does the patio base matter?
A patio is only as good as its base, so the sub-base and bedding decide whether it stays level over time. Slabs laid on a poor base sink, rock and lift, so ask how the contractor prepares the base for your ground.
Which way should a patio fall?
A patio must fall away from the house so water runs off rather than pooling or draining toward the building. Ask how the contractor sets the falls and where the runoff goes, since getting it wrong can direct water at the house.
How do I judge paving quality?
Look at past patios for neat jointing, consistent gaps and clean cuts, especially around edges and obstacles. Confirm the contractor has experience with your chosen paving material.
Where do patios usually fail?
Often at the edges and level changes, where weak detailing lets the patio spread or look unfinished. Ask how the contractor edges the patio and handles transitions, and remember drainage rules vary by location and project.
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