Screed Calculator

Screed Volume & Cost Calculator

(Typical sand/cement screed is around 2000-2200 kg/m³)

Calculation Results:

Volume of Screed Needed: — m³

Total Weight of Screed: — kg

Estimated Total Cost: — €

function calculateScreed() { var areaSqMeters = parseFloat(document.getElementById('areaSqMeters').value); var screedThicknessMM = parseFloat(document.getElementById('screedThicknessMM').value); var screedDensityKgM3 = parseFloat(document.getElementById('screedDensityKgM3').value); var screedCostPerM3 = parseFloat(document.getElementById('screedCostPerM3').value); if (isNaN(areaSqMeters) || areaSqMeters <= 0) { alert('Please enter a valid area (greater than 0).'); return; } if (isNaN(screedThicknessMM) || screedThicknessMM <= 0) { alert('Please enter a valid screed thickness (greater than 0).'); return; } if (isNaN(screedDensityKgM3) || screedDensityKgM3 <= 0) { alert('Please enter a valid screed density (greater than 0).'); return; } if (isNaN(screedCostPerM3) || screedCostPerM3 < 0) { alert('Please enter a valid cost per cubic meter (0 or greater).'); return; } var screedThicknessMeters = screedThicknessMM / 1000; // Convert mm to meters var volumeCubicMeters = areaSqMeters * screedThicknessMeters; var totalWeightKg = volumeCubicMeters * screedDensityKgM3; var totalCost = volumeCubicMeters * screedCostPerM3; document.getElementById('volumeCubicMeters').innerHTML = 'Volume of Screed Needed: ' + volumeCubicMeters.toFixed(2) + ' m³'; document.getElementById('totalWeightKg').innerHTML = 'Total Weight of Screed: ' + totalWeightKg.toFixed(2) + ' kg'; document.getElementById('totalCost').innerHTML = 'Estimated Total Cost: ' + totalCost.toFixed(2) + ' €'; }

Understanding Screed and How to Calculate Your Needs

Screed is a crucial component in many construction and renovation projects, particularly for flooring. It's a thin, level layer of material, typically a sand and cement mix, applied over a concrete slab or insulation to create a smooth, durable surface ready for the final floor covering like tiles, laminate, or carpet.

What is Screed Used For?

• Levelling: It provides a perfectly flat and smooth surface, correcting any imperfections in the subfloor.
• Underfloor Heating: Screed encapsulates underfloor heating pipes, distributing heat evenly across the room.
• Sound Insulation: Certain types of screed can contribute to acoustic insulation.
• Strength and Durability: It adds structural integrity and a hard-wearing layer to the floor.

Key Factors for Screed Calculation

Calculating the correct amount of screed is essential to avoid waste or costly delays due to insufficient material. The primary factors are:

1. Area to be Screeded (m²): This is the total surface area of the floor where screed will be applied. Accurate measurement is critical.
2. Desired Screed Thickness (mm): The thickness depends on the type of screed, the subfloor, and the intended use of the room. Common thicknesses range from 50mm for bonded screeds to 75mm or more for unbonded or floating screeds, especially with underfloor heating.
3. Screed Density (kg/m³): This refers to the weight of the screed per cubic meter. Standard sand/cement screed typically has a density of around 2000-2200 kg/m³. Lighter screeds (e.g., with lightweight aggregates) will have lower densities. This factor is important for calculating the total weight, which impacts transport and structural considerations.
4. Cost per Cubic Meter (€/m³): The price of the screed material itself, which can vary based on type, supplier, and location.

How the Screed Calculator Works

Our calculator simplifies the process by taking your input values and applying basic geometric formulas:

• Volume Calculation: The calculator first converts your desired thickness from millimeters to meters. Then, it multiplies the Area (m²) by the Thickness (m) to determine the total Volume of screed needed in cubic meters (m³).
• Weight Calculation: The calculated Volume (m³) is then multiplied by the Screed Density (kg/m³) to give you the total estimated weight of the screed in kilograms (kg). This is vital for logistics and ensuring your subfloor can support the load.
• Cost Estimation: Finally, the Volume (m³) is multiplied by the Cost per Cubic Meter (€/m³) to provide an estimated total material cost.

Tips for Accurate Calculation and Application

• Measure Accurately: Double-check your room dimensions to get the most precise area measurement.
• Consider Waste: It's always a good idea to add a small percentage (e.g., 5-10%) to your calculated volume to account for waste, spillages, and minor variations in subfloor levels.
• Consult Specifications: Always refer to the manufacturer's guidelines for specific screed products regarding minimum and maximum thicknesses, especially for specialist screeds or those used with underfloor heating.
• Professional Advice: For large or complex projects, always consult with a qualified builder or screeding specialist.

Using this calculator will help you plan your screeding project more efficiently, ensuring you order the right amount of material and budget effectively.