1. What is the Sand Sub Base Calculator?

The Sand Sub Base Calculator helps determine the amount of sand needed for the bedding layer beneath pavers. A proper sand base is crucial for paver stability, drainage, and preventing shifting over time.

2. How Does the Calculator Work?

The calculator uses the following formula:

Where:

• \( Area \) — The surface area to be covered with pavers (in square meters)
• \( Depth \) — The depth of the sand layer (typically 0.03 meters or 30mm)
• \( Density \) — The density of sand (typically 1600 kg/m³)

Explanation: The calculation determines the weight of sand needed by multiplying the volume (area × depth) by the density of sand.

3. Importance of Proper Sand Base

Details: A properly prepared sand base provides a stable, level surface for pavers, allows for proper drainage, and helps prevent weed growth. The typical depth for a paver sand base is 25-40mm (0.025-0.04m).

4. Using the Calculator

Tips: Measure your area accurately in square meters. The default depth of 0.03m (30mm) is recommended for most residential paver projects. The density of 1600 kg/m³ is standard for construction sand.

5. Frequently Asked Questions (FAQ)

Q1: What type of sand should I use?
A: Use coarse, sharp sand or specifically labeled "paver sand" - not play sand or fine sand which compacts too much.

Q2: Can I use this for gravel calculations?
A: No, gravel has a different density (typically about 1500 kg/m³) and different depth requirements.

Q3: How do I convert to cubic meters?
A: Divide the kg result by the density (1600 kg/m³) to get volume in m³.

Q4: Should I add extra for compaction?
A: The calculation includes compaction - the depth you enter should be the compacted depth you want.

Q5: How many bags of sand will I need?
A: Divide the total kg by the bag size (typically 25kg bags) and round up to whole bags.