The Hardie Lap Siding Calculator simplifies the planning process for installing Hardie lap siding by calculating the number of siding planks needed for a project. Precise calculations are crucial as they prevent material wastage and ensure that the installation process goes smoothly.
Formula of Hardie Lap Siding Calculator
Overview
To calculate the number of Hardie lap siding planks required for your project, you can use the following formula:
Number of planks = Area (m²) / (Coverage (m²/linear meter) * Batten center (meters))
Detailed Formula Breakdown
- Area (m²): This is the total surface area that needs to be covered with siding.
- Coverage (m²/linear meter): This refers to how much area a single linear meter of plank covers.
- Batten center (meters): This is the space between each batten (the structural supports on which siding planks are installed).
Plank Coverage per Linear Meter
James Hardie provides several types of plank sidings, each with different dimensions and coverage areas. Below is a detailed table showing the coverage per linear meter for various products:
| Product | Coverage (m²/linear meter) |
|---|---|
| James Hardie plank cladding (horizontal) | 0.19 |
| James Hardie plank cladding (Vertical) | 0.19 |
| James Hardie plank cladding (open joint install) | 0.18 |
| James Hardie plank VL (horizontal) | 0.20 |
| James Hardie plank VL (Vertical) | 0.20 |
Useful Pre-Calculated Tables
To further simplify your project planning, here are some pre-calculated tables that estimate the number of planks needed based on common area sizes:
Example Table: Number of Planks Required per Area Size
| Area (m²) | Planks Needed (Horizontal Installation) | Planks Needed (Vertical Installation) |
|---|---|---|
| 10 | 54 | 54 |
| 20 | 108 | 108 |
| 50 | 270 | 270 |
Example of Hardie Lap Siding Calculator
Scenario Description
Imagine you are planning to cover a 20 m² wall with James Hardie plank cladding (horizontal).
Step-by-Step Calculation
- Calculate the total area: The area to cover is 20 m².
- Determine the coverage per plank: Using the table, the coverage is 0.19 m²/linear meter.
- Calculate the number of planks required:Number of planks = 20 / (0.19 * 1) = 105.26, approximately 106 planks
Most Common FAQs
If your area doesn't match standard sizes, measure the exact length and width of the area, multiply to get the area in square meters, and use the formula to calculate the number of planks needed.
Yes, cut pieces can often be reused on the project, especially for filling smaller gaps, which can further reduce waste and cost.
Use a reliable tape measure or digital measuring tool to get the length and width of your space. Ensure to measure twice for accuracy and note down dimensions in meters for straightforward calculation using the formula.
