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Estimating Decks

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Estimating Decks: A Comprehensive Guide

Contents
  1. Introduction
  2. Measuring Decking Boards
  3. Measuring Floor Joists
  4. Measuring Bearers
  5. Cost Estimation
  6. Conclusion
  7. What Else is Needed ?
  8. Need a Professional Estimator ?

Introduction

Building a deck is a great way to add extra living space and value to your home. But before you can enjoy your dream deck, there’s a considerable amount of planning and budgeting involved. This article will guide you through the process of estimating decks, using metric measurements, and calculating costs.

Measuring Decking Boards

Decking boards are the surface material of your deck. To measure them, you’ll need to consider both the length and width of your deck.

  1. Length: Measure the length of your deck in meters. This is the longest side of the deck.
  2. Width: Measure the width of your deck in meters. This is the shorter side of the deck.
  3. Board Width: Decking boards typically come in widths of 90mm or 140mm. Choose the one that suits your design and preference.
  4. Calculation: Divide the total deck area (length x width) by the area of one board (length x board width). Always round up to the nearest whole number to ensure you have enough boards.

Measuring Floor Joists

Floor joists are the supporting structures that hold up the decking boards.

  1. Spacing: Joists are typically spaced 400mm to 600mm apart from each other. The exact spacing depends on the type of decking material you’re using.
  2. Calculation: To find out how many joists you’ll need, divide the width of your deck by the spacing of the joists, then add one (for the final joist at the end of the deck).
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Measuring Bearers

Bearers are the larger beams that support the joists.

  1. Spacing: Bearers are usually spaced between 1.2m to 1.5m apart.
  2. Calculation: To calculate the number of bearers needed, divide the length of your deck by the spacing of the bearers, then add one (for the final bearer at the end).

Cost Estimation

Once you’ve calculated the amount of materials needed, you can estimate the cost.

  1. Material Costs: Multiply the number of each component (decking boards, joists, bearers) by the cost per unit of each. Don’t forget to include other materials like screws, nails, and brackets.
  2. Labour Costs: Estimate the number of hours it will take to build the deck and multiply this by the hourly rate for labour.
  3. Markup: Finally, add a markup to cover overheads and profit margin. This is typically a percentage of the total cost (materials + labour).

Conclusion

Estimating a deck involves careful measurement and cost calculation. By understanding how to measure your decking boards, floor joists, and bearers, and how to apply cost prices and markups, you can ensure your deck project stays on budget and on schedule. Happy building!

What Else is Needed ?

You should also consider
– The footings and support for your deck
– If Council Approval is Required
– Who is drawing the plans
– Is an Engineer Required

Need a Professional Estimator ?

If your a tradie and you need a professional building estimator to help you we can point you in the right direction, contact us.