Short answer
Blue board and regular drywall are both gypsum boards, but they are built for different finishes. Regular drywall has its joints taped and covered with joint compound, then sanded and painted. Blue board is a blue-faced gypsum base made to receive a thin coat of veneer plaster, which is applied by plasterers and typically finished in about two coats. Neither is automatically better. The right choice depends on the finish you want, your budget and who is doing the work.
What blue board is
Blue board (also sold as blue-face gypsum base or veneer plaster base) has a specially treated paper face that is absorbent so the wet plaster bonds well to it. It is installed much like drywall, with the joints reinforced with tape, and then skim-coated with veneer plaster. Contractors in some regions, such as New England, use it widely in homes, while in other areas many people have rarely seen it.
What regular drywall is
Regular drywall is the standard paper-faced gypsum board hung on walls and ceilings. Joints are taped and covered with joint compound over several coats, sanded smooth, primed and painted. It is the most common wall finish in North America. For the finishing process, our drywall guides cover each step.
Key differences
| Blue board with veneer plaster | Regular drywall | |
|---|---|---|
| Surface | Thin plaster skim coat | Paper face, joints finished with compound |
| Finish look | Hard, smooth surface, often considered high end | Smooth if well finished, texture is common |
| Labor | Plasterers, often a specialized trade | Hangers and finishers, widely available |
| Cost | Generally higher | Generally lower |
| Drying and cure | Less sanding, but the plaster needs time to cure before paint | Several coats, each needing to dry, plus sanding |
| Hardness | Typically harder and more dent resistant | Softer, easier to dent |
Exact costs and timelines vary by region and contractor, so ask for quotes on both.
Why choose plaster over drywall
People pick a veneer plaster system for a harder, more durable and often more refined surface, to match existing plaster in an older home, or because the local trades are experienced with it. Drywall wins on cost, speed of availability, and ease of DIY repair.
Can you paint blue board?
Plastered blue board can be painted once the plaster has cured. Contractors commonly advise waiting until the plaster is fully dry; one local contractor suggests one to two weeks, but follow the plaster maker’s instructions. Some people leave the plaster unpainted. Do not paint bare blue board paper directly. It is made to be covered with plaster, and paint on the raw face is not the intended finish. If someone has used blue board with compound-finished joints instead, ask the product maker or a pro what primer and procedure they approve.
Cost and skill
Is blue board more expensive than drywall? In most cases the whole system costs more, mainly because of the plastering labor. The board itself is not the main factor. Plastering is a skilled trade, and results depend heavily on the plasterer, so it is not a typical first DIY project.
Moisture: a common misconception
Some contractor pages describe blue board as resistant to water and mold. Be cautious here. Blue board is designed for plaster bonding, not moisture resistance. If you need a board for damp rooms, look at the options in drywall for high humidity. Blue board is still gypsum with paper facing, so it is porous like other gypsum boards. See is drywall porous.
Repairs and DIY
Patching plastered blue board walls is trickier than patching painted drywall, because a good repair needs to match the plaster texture and hardness. For small holes, some homeowners use patching products intended for plaster or all-purpose compounds, but matching can be difficult. For large repairs, hire someone experienced with veneer plaster. If your older home has plaster or textured finishes from before the 1980s, have them tested for asbestos before sanding or cutting into them (see asbestos in drywall mud). For why plaster walls crack, see why plaster walls crack.
Which should you choose?
- Choose blue board and veneer plaster if you want a hard plaster surface, match existing work, or have a plasterer available at an acceptable price.
- Choose regular drywall if cost, availability, simple repairs and DIY friendliness matter more.
- For wet or humid rooms, choose a board made for moisture and follow its installation instructions, rather than relying on blue board.
If you are unsure what a wall is made of, a small test hole in an inconspicuous place or advice from a local contractor can help you identify it before you plan repairs.