When it comes to home improvement projects like decking or fencing, calculating the correct number of feather edge boards needed can seem tricky. However, with some simple measurements and math, determining the quantity of 125mm feather edge boards is straightforward.
What are Feather Edge Boards?
Feather edge boards, sometimes called featherboards or featherboarding, are long, thin pieces of wood with one edge thicker than the other. The thicker edge creates a feathered look. Feather edge boards are often used for fencing, decking, and cladding projects.
Feather edge boards typically come in widths of 125mm, 150mm, or 175mm. The most common thickness is 22mm, but 18mm and 32mm are also available. The lengths range from 1.8m up to 5.4m.
The feathered edge of the board creates an overlapping pattern and attractive shadow lines when installed. Using multiple widths together can create a layered, natural look. They are often used in contemporary garden designs and outdoor living spaces.
Calculating the Number of Feather Edge Boards
To determine how many 125mm feather edge boards you need, start by measuring the area you want to cover in square meters. Use a measuring tape to get the length and width of the area and multiply them together to calculate the square meterage.
For example, if you are fencing in a 4m x 10m garden space:
Length = 4m
Width = 10m
Area = Length x Width
= 4m x 10m
= 40m2
Once you know the area in square meters, divide it by the coverage of one feather edge board to get the total number of boards needed. The coverage of a 125mm feather edge board is typically around 0.125m2 per linear meter when installed with a small gap between each board.
To get the coverage in m2:
Board width = 0.125m
Coverage per linear m = width x 1m
= 0.125m x 1m
= 0.125m2
Now divide the total area by the coverage:
Total Area = 40m2
Coverage per Board = 0.125m2 per linear m
Number of Boards = Total Area ÷ Coverage per Board
= 40m2 ÷ 0.125m2 per linear m
= 320 linear m
So for the 4m x 10m space, you would need 320 linear meters of 125mm feather edge boards.
Ordering the Right Quantity
Once you know the linear meters required, you can determine the number of boards to purchase based on the standard board lengths available.
For example, if you need 320 linear m of coverage and the feather edge boards come in 5.4m lengths, you would need:
320 linear m needed ÷ 5.4m board length = 59 boards
So in this scenario, you would need to purchase 59 boards at 5.4m each to cover the 320 linear meter space.
Remember to account for a little extra wastage too. It’s a good idea to add 5-10% onto your order to allow for any cutting, breakages or mistakes. For a project requiring 59 boards, ordering an extra 3-6 boards would give some wiggle room.
Key Things to Keep in Mind
When calculating how many feather edge boards you need for your project, keep these tips in mind:
- Accurately measure the area to be covered in square meters
- Use the board width to calculate the coverage per linear meter
- Divide the total area by the coverage to get linear meterage needed
- Factor in the standard board lengths when ordering
- Add 5-10% extra boards to allow for wastage and errors
- Remember that actual board dimensions are usually slightly less than stated
- Consider using a feather edge board calculator for convenience
Using a Feather Edge Board Calculator
To make calculating feather edge boards even easier, you can use an online feather board calculator. These tools allow you to simply input the dimensions of your project and the board width, and it will automatically determine the quantity needed.
For example, if using a calculator for the 4m x 10m project using 125mm boards, you would input:
- Length: 4m
- Width: 10m
- Board width: 125mm
And the calculator would output that you need 59 boards at 5.4m length (with no wastage added).
Most feather edge board calculators also let you specify the board lengths available and add a wastage percentage. This makes ordering the materials for your project even quicker and easier.
Conclusion
Determining the quantity of feather edge boards needed for a project is straightforward with some simple area calculations and division. Measure the space, calculate the square meterage, divide by the board coverage per linear meter, and factor in board lengths to get the amount to purchase. Leaving a little extra for wastage is also a good idea.
For convenience, an online feather edge board calculator can simplify the process further. Just input your dimensions and board width and it will provide the quantities required. With the right preparation and measurements, you can calculate the perfect amount of 125mm or other width feather edge boards for your next project.
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Frequently Asked Questions
How do you calculate linear meters for feather edge boards?
To calculate the linear meters needed for feather edge boards:
- Measure the length and width of the area to cover and multiply them to get the area in square meters
- Decide on the feather edge board width you will use (e.g. 125mm)
- Look up or calculate the coverage per linear meter for that width board (125mm = approx 0.125m2 per linear m)
- Divide the total area by the coverage per linear m to get the linear meterage required
What is the coverage per linear meter for 125mm feather edge boards?
A 125mm feather edge board typically covers around 0.125 square meters per linear meter when installed. This is calculated by multiplying the board width (0.125m) by 1 linear meter coverage.
How much gap do you leave between feather edge boards?
It is recommended to leave a 3-6mm gap between each installed feather edge board. This allows for expansion and contraction and provides drainage. Using board widths of different sizes together can minimize the appearance of the gaps.
Should I add extra boards for wastage?
It is advisable to order 5-10% extra feather edge boards above the calculated quantity needed. This provides a buffer for any boards cut down, broken during transport or installation, or other potential wastage.
What are the standard feather edge board lengths?
Feather edge boards usually come in set lengths ranging from 1.8m up to 5.4m. The most common lengths are 1.8m, 2.4m, 3.0m, 3.6m, 4.2m, 4.8m and 5.4m. Check with your supplier for the specific lengths they have in stock.
How thick are 125mm feather edge boards?
A standard 125mm feather edge board is usually 22mm thick. 18mm and 32mm thicknesses are also available but less common. The 125mm measurement refers to the width or face size rather than thickness.
Can you rip feather edge boards to custom widths?
It is possible but not recommended to rip down or cut feather edge boards to narrower custom widths. This can compromise the strength and integrity of the board. It’s best to use the standard widths available from suppliers.
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Installation Tips
Installing feather edge boards properly is key to creating a long-lasting and visually appealing finish. Here are some useful installation tips:
- Use string lines along the top and bottom of the planned area to ensure boards are aligned evenly.
- Pre-drill and countersink all screw holes to prevent splitting.
- Use exterior grade stainless steel or coated decking screws.
- Make sure board lengths are staggered so joints do not all align.
- Allow 3-6mm gaps between boards for drainage and expansion.
- Install boards with the thicker feathered edge alternating up and down for visual interest.
- Use a rubber mallet against a spare piece of wood to tap boards into place.
- Seal board ends with primer or paint to prevent moisture absorption.
- Consider using colour matched exterior screws for a hidden look.
Taking care during installation will result in professional looking feather edge cladding or fencing that lasts.
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Maintenance
Like any wood products used outdoors, feather edge boards will require some periodic maintenance to keep them looking their best. Here are some tips for properly maintaining feather edge boards:
- Inspect boards yearly and look for any warped, cracked or damaged pieces. Replace individual boards as needed.
- Clean annually with a pressure washer on a low setting to remove dirt and debris. Allow boards to fully dry.
- Apply a fresh coat of exterior wood finish every 1-2 years. Choose a finish suited for outdoor use.
- Look for areas where water may be pooling on horizontal boards and redirect drainage if needed.
- Ensure proper gap spacing is maintained between boards to allow drainage and prevent buckling.
- Re-coat any cut ends or drill holes with primer to protect the bare wood.
- Tighten any loose screws, nails or fixings. Look for evidence of wood splitting.
- Clear earth, soil and vegetation away from the base of the boards to prevent insect and moisture damage.
With routine inspection and cleaning, and re-application of protective finish when required, feather edge boards can maintain their beauty for many years.
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Cost Analysis
When budgeting for a project using feather edge boards, it’s important to understand the typical material and installation costs involved:
Material Costs
- Feather edge boards: $4 – $9 per linear meter for 125mm boards. Higher quality timber costs more.
- Fixings: Approximately $0.05 – $0.10 per screw for exterior grade screws. Allow 30-40 screws per square meter.
- Finish: About $15 per litre for exterior wood oils, stains or paints. One coat required.
As an example, for a 4m x 10m fenced area (40 square meters) using 125mm boards:
- 320 linear m of boards needed = $1,280 – $2,880 for materials
- 1,200 – 1,600 screws approx. = $60 – $160
- 5 litres of finish = $75
Total materials cost = $1,415 – $3,115
Installation Cost
Expect to pay $25 – $45 per square meter for professional installation of feather edge cladding or fencing. Complex sites or difficult access may be higher.
For a 40 square meter area, installation cost would be:
- 40 sqm x $25 per sqm = $1,000
- 40 sqm x $45 per sqm = $1,800
This brings the total installed cost to between $2,415 – $4,915 for a 40 square meter feather edge board project.
Factors Affecting Cost
The overall cost can be influenced by:
- Board quality, wood type and profile
- Required framing/battens
- Coating and finishing selection
- Complexity of installation site
- Professional vs DIY installation
- Geographic location and labour rates
Getting quotes from several suppliers and contractors is recommended to find the best value. Higher upfront cost can be balanced by greater long term durability.
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Design Inspiration
Feather edge boards can lend themselves to many designs from ultra-modern to traditional when installed thoughtfully. Here are some inspiration ideas:
Mix Board Widths
Using a blend of different feather edge widths like 125mm, 150mm, and 175mm together adds visual interest and texture.
Contrasting Finishes
Consider pairing boards painted in different colours like light and dark greys or accent colours for modern appeal.
Borders and Accents
Use wider feather boards or contrasting colours to create a border or frame other materials like concrete, stone or metal panels.
Curves and Patterns
Bend boards in fluid curves or create geometric patterns for contemporary impact in garden beds or dividers.
Shadow Lines
Install boards alternately with thinner and thicker edges up or down to get striking shadow lines and layering.
Lighting
Backlighting or downlighting boards can produce a dramatic look, highlight textures, and set a warm evening ambience.
Planter Walls
Use feather boards creatively as vertical planter walls to divide spaces and create green gardens.
Focal Points
Grouping boards in unique shapes or geometries can create a focal point, particularly when lit or colourful.
Letting your creative vision guide you will allow for endless possibilities with feather edge boards. Consult designers and tradesmen to realise custom concepts.
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Sourcing Quality Materials
Where you purchase your feather edge boards from can impact the quality and longevity of the finished project. Here are some tips for sourcing quality boards:
- Shop at reputable timber and building material suppliers that specialise in outdoor/decking products.
- Ask about the species, grade, and origin of the timber boards.
- Check boards are stamped with durability treatment certifications if applicable.
- Select boards milled from durable timbers like spotted gum, cypress, or merbau.
- Avoid boards with visible cracks, warps, knots, or other defects.
- Confirm boards come with warranties – longer is generally better.
- Ask for documentation of any chemical treatments or coatings.
- Buy boards sized specifically for feather edge cladding, not multi-purpose timber.
- Compare prices but consider quality and lifespan not just cost.
Doing thorough research and asking the right questions will help ensure you purchase high-quality, fit for purpose feather edge boards that will last.
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