Why is plasterboard thickness important?
The thickness of a plasterboard directly impacts the durability of your work, but also influences:
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The mechanical resistance of partitions and ceilings
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The thermal and acoustic performance of the structure
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Fire, impact, and moisture resistance in certain cases
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The weight and ease of installation of plasterboards
The thickness of the plasterboard therefore essentially depends on the technical requirements of your project.
The main plasterboard thicknesses and their applications
The most commonly used plasterboard is BA13 plasterboard. "BA" stands for "bords amincis" (tapered edges) and "13" is its thickness in millimeters (the actual thickness of this standard board is 12.5mm).
Good to know: what plasterboard thicknesses are available and which is the thinnest plasterboard?
Depending on the work to be done, plasterboards are available in thicknesses ranging mainly from 6 mm for the thinnest to 25 mm.
Standard thicknesses: BA13, BA10, BA15 and more
The different plasterboard thicknesses allow for adaptation to many technical requirements:
BA6 and BA10 plasterboard: thin and flexible boards, ideal for creating a curved partition, a light suspended ceiling, or for covering a damaged wall while limiting the loss of habitable space.
BA13 plasterboard: very versatile standard boards suitable for all common plastering work (interior partitions, false ceilings, linings, etc.)
BA15 plasterboard: solid plasterboards, resistant to impact and recommended for spaces requiring good sound insulation (offices, schools, healthcare establishments, etc.)
BA18 and BA25 plasterboard: high-density plasterboards offering high mechanical resistance, used for technical partitions in industrial premises and public access buildings (ERP).
When to choose thinner or thicker boards?
As mentioned earlier, thin plasterboards like BA6 and BA10 are intended for non-load-bearing or decorative uses. Thicker boards like BA15 or BA18 are recommended for partitions or ceilings requiring reinforced thermal and sound insulation, or for walls exposed to impact risks.