Weights and handling
Plasterboard sheet weight and total load
- where
- weight per sheet (kg)
- board weight (kg/m²)
- board width (mm)
- board length (mm)
- total weight (kg)
- number of sheets
- sheet weight as a share of the guideline (%)
- HSE guideline weight (kg)
Explain this equation
Works out what each plasterboard sheet weighs and the weight of a stack, and compares a sheet with the HSE lifting guideline.
q is the board weight per m² from the data sheet. Wb and Lb are the sheet size in millimetres, so Wb × Lb divided by 1,000,000 is the sheet area in m². Ws is one sheet, Wt is N sheets. P shows the sheet as a percentage of the guideline weight G.
Weight is simply weight per area times area. The guideline comparison is a quick screening check from HSE's lifting filter.
Sense check: a 2400 × 1200 standard 12.5 mm board is about 22–24 kg; the same size in 15 mm acoustic or fire board is about 40 kg.
Watch out: the HSE figure assumes a compact load held close to the body; a full sheet cannot be held that way, so treat it as a two-person or mechanical lift.
Weight of each plasterboard sheet and of a stack, from the weight per m² on the manufacturer's data sheet.
Enter your values to see the result.
Good to know
Typical Gyproc weights (Saint-Gobain selector guide): WallBoard 9.5 mm 7.6, 12.5 mm 8.45, 15 mm 10.5; SoundBloc 12.5 mm 11.4, 15 mm 14; FireLine 12.5 mm 12, 15 mm 14; Plank 19 mm 16.6 kg/m². The UK WallBoard 12.5 mm data sheet gives a minimum of 7.7 kg/m². Knauf and Siniat boards are similar but check their sheets. HSE's lifting filter is 25 kg for men with the load held close at waist height (lower for women, and when the load is held away from the body, high or low); it is a filter, not a safe limit, and a 1200 mm sheet cannot be held close, so treat full sheets as a two-person or mechanical lift.
Common mistake
Using the standard board weight for acoustic or fire boards, which are up to 60% heavier.
Limits
Dry board weight from data sheets; boards that have taken on water are heavier. The HSE figure is a screening value; a proper manual handling assessment considers posture, distance, frequency and the individual.
Sources
- Gyproc (Saint-Gobain) Plasterboard Selector Guide: board weights, e.g. WallBoard 12.5 mm 8.45, 15 mm 10.5; SoundBloc 12.5 mm 11.4, 15 mm 14; FireLine 12.5 mm 12, 15 mm 14; Plank 19 mm 16.6 kg/m²
- British Gypsum, Gyproc WallBoard 12.5 mm product data sheet (minimum weight 7.7 kg/m²; sheet sizes)
- HSE INDG143 Manual handling at work: lifting and lowering risk filter (25 kg guideline for men with the load close to the body at waist height; guidelines are a filter, not safe limits)
Results are calculations from the published methods and manufacturer figures shown, and depend on the data you enter. Always follow the manufacturers’ system and product data, BS 8212, BS EN 13914 and Building Regulations. Coverage rates vary by product, background and thickness. Check prices, VAT and CIS rules with your own records and HMRC.