Who this guide is for
- Homeowners replacing a worn or aging deck
- People unsure whether the substructure can be reused
- Anyone considering a material upgrade for the new deck
- Owners comparing deck contractors on assessment quality
Assess the existing substructure
The frame and supports under a deck matter more than the boards on top. A good contractor inspects the substructure and tells you honestly whether it can be reused or must be rebuilt, rather than just replacing the visible surface.
Be wary of a contractor who quotes to re-board without looking underneath.
- Ask how they assess the substructure
- Confirm whether the frame can be reused
- Avoid surface-only quotes
- Discuss what they look for below the boards
Plan removal and disposal
Replacing a deck generates waste that has to be removed and disposed of responsibly. Confirm whether removal and disposal are included and how old materials are handled, especially treated timber.
Clarify access for getting old and new materials in and out.
Weigh a material upgrade
A replacement is a natural moment to consider different decking — timber, composite or another material with different upkeep. Discuss the options and how each suits your use and conditions.
Compare in terms of look, maintenance and longevity rather than a single figure.
- Consider whether to upgrade the decking material
- Compare look, upkeep and longevity
- Match material to your use and climate
- Discuss board profile and finish
Compare on the same scope
Quotes differ depending on whether the substructure is reused, the material chosen and disposal. Give each contractor the same brief and ask what is included so quotes compare.
Ask what could change once the old deck is lifted.
Keep structure with qualified professionals
Raised and elevated decks carry load and connect to the house, which is structural work. Confirm who is responsible for the structural elements and that the contractor works to proper standards.
Ask to see relevant insurance and experience for elevated decks.
- Identify structural and elevated elements
- Confirm who handles structural design
- Ask to see relevant insurance
- Match experience to your deck type
Hiring checklist
- 1Decide your goals for the new deck
- 2Ask how the substructure is assessed
- 3Confirm whether the frame can be reused
- 4Check removal and disposal are included
- 5Discuss material upgrade options
- 6Compare materials on upkeep and longevity
- 7Give each contractor the same brief
- 8Ask what could change once the old deck is lifted
- 9Identify structural and elevated elements
- 10Confirm who handles structural design and insurance
Common mistakes to avoid
- Re-boarding over a substructure that should be rebuilt
- Assuming disposal of old decking is included when it is not
- Missing the chance to weigh a material upgrade
- Comparing quotes that differ on substructure and material
- Treating an elevated deck as non-structural work
- Skipping insurance and experience checks for raised decks
When to involve a professional
- Route structural and elevated deck elements to qualified professionals
- Confirm the substructure is assessed before any quote
- Ask to see comparable deck replacements before hiring
- Ask to see relevant insurance for the work
- Remember structural and deck requirements vary by location and project
Frequently asked questions
Questions readers ask about this topic
Can my old deck frame be reused?
Sometimes, but only after a proper assessment of the substructure, which matters more than the boards on top. A good contractor inspects the frame and supports and tells you honestly whether they can be reused or must be rebuilt.
Is disposal of the old deck included?
Not always — replacing a deck generates waste that must be removed and disposed of responsibly. Confirm whether removal and disposal are included and how old materials, especially treated timber, are handled.
Should I change decking material?
A replacement is a natural moment to consider a different material with different upkeep and look. Compare timber, composite and other options on maintenance and longevity rather than a single figure, matched to your use and climate.
Is a deck structural work?
Raised and elevated decks carry load and connect to the house, so those elements are structural and need qualified input. Confirm who handles structural design and ask for relevant insurance, since requirements vary by location and project.
Keep reading