Drylining vs Wet Plaster: Which One Do You Actually Need?

You've been quoted two different prices for the same room. One plasterer says he'll board it and skim it. The other says he'll hack off the old plaster and go wet. The first quote is hundreds less. The second plasterer says it'll be "done properly." Now you're stuck, and you're not sure who to believe.

This is one of the most common questions we get from homeowners across Bournemouth and Dorset. The answer isn't always the same. It depends on your walls, your property and what you're trying to achieve. So here's the honest breakdown.

What is wet plastering?

Wet plastering is the traditional method. A sand and cement base coat goes straight onto the wall: brick, block or stone. Once that's flat and set, a finish coat of gypsum plaster (the skim) goes on top. The skim dries rock-hard in about 48 hours. The whole wall becomes one solid surface.

This is how every house in the country was plastered before plasterboard became common. It's also making a comeback. More plasterers are going back to wet work, especially on period properties where the walls need to breathe. There's a good reason for that trend. On the right wall, wet plaster lasts decades longer and handles moisture far better than board ever will.

If you want to understand more about what's involved in a full plaster and skim, we've covered the process on our main service page.

What is drylining?

Drylining means fixing plasterboard to the wall and then skimming over it. The board can be screwed to timber battens, stuck on with adhesive (that's the dot and dab method), or fixed to a metal frame. Once the board is up, the joints are taped and the whole surface is skimmed with a thin coat of finish plaster.

It's faster. It's lighter. And it gives you a flat surface even when the wall behind it is all over the place. That's why builders love it, especially in new builds and extensions where the blockwork isn't always perfect.

We go into this in more detail on our drylining and plasterboarding page if you want the full picture.

When wet plaster wins

Solid period walls. If you've got a Victorian terrace or an Edwardian semi with solid 9-inch brick walls, wet plaster is almost always the better choice. These walls were built to work with lime and sand. Sticking plasterboard over them traps moisture between the board and the brick. Over time, that leads to damp patches, blown plaster and black mould behind the boards. Problems you won't even see until they're serious.

Character properties. Old houses have uneven walls. That's part of the charm. Wet plaster follows the shape of the wall rather than hiding it behind a flat sheet. You keep the character of the building instead of making every room look like a new-build box.

Where every millimetre counts. Drylining eats into the room. Dot and dab plus board plus skim adds roughly 25 to 35mm to every wall you line. In a small bedroom, that's 50 to 70mm off the room width. In a narrow hallway, you'll feel it. Wet plaster sits much tighter, typically 12 to 15mm total.

Listed buildings. If the property is listed, conservation officers will often require traditional lime plaster. Plasterboard isn't just wrong here, it might not be allowed.

When drylining wins

Speed. A plasterer can board and skim a standard room in a day. Wet plastering the same room takes two to three days minimum: base coat, drying time, skim coat. If you're on a tight schedule, drylining gets you to the decorator faster.

New builds and extensions. Fresh blockwork in a new extension is the perfect surface for plasterboard. The blocks are clean, dry and relatively flat. There's no moisture to worry about. Drylining here is the standard approach for good reason.

Uneven blockwork. When the wall behind is rough, out of plumb or poorly laid, drylining lets you create a flat, true surface without having to straighten the wall with thick coats of sand and cement. That saves time and material.

Insulation. If you're adding insulation, either thermal boards or insulation behind a stud wall, drylining is the only practical method. The insulation sits behind the board, and you skim over the top. There's no wet-plaster equivalent that works as neatly.

The cost difference

Wet plastering costs more. That's a fact, not a sales pitch. It takes longer, it's more physically demanding, and it requires more skill to get a flat finish over a base coat. A wet-plastered room might cost 30 to 50% more than the same room drylined.

But cheaper isn't always better. If wet plaster is what the wall needs, and you go with board to save money, the problems that follow (damp, cracking, re-doing the work in five years) will cost more than doing it right the first time.

And sometimes drylining genuinely is the right method. On a new-build extension with clean blockwork, paying for wet plaster would be spending money for no benefit. The board gives you an identical finish at a lower price.

The honest answer: the right method depends on the wall, not the budget.

What about the finish?

This is the myth that won't die: "wet plaster gives a better finish than board."

It doesn't. Not if the skim is done well. Once a plasterboard wall has been properly taped, jointed and skimmed with two coats of multi-finish, you cannot tell the difference by looking at it or touching it. The final surface is the same material, gypsum plaster, applied the same way with the same trowel.

Where the difference shows up is behind the surface. Wet plaster gives you a solid, dense wall that feels different when you knock on it. Drylined walls sound hollow. That bothers some people. It doesn't affect the paint finish at all, but it does affect how the wall feels to live with.

The other place it matters is fixings. Hanging a heavy mirror or a wall-mounted TV on a drylined wall means finding the battens or using specialist plasterboard fixings. On a wet-plastered solid wall, you drill into brick. That's stronger and simpler.

So which should I choose?

Here's a quick way to think about it:

Go wet if: your walls are solid brick or stone, the property is pre-1960, you're in a conservation area or listed building, the room is small and you can't afford to lose space, or the existing plaster is damaged but the wall behind is sound.

Go dryline if: you're plastering a new extension, the blockwork is uneven, you need insulation behind the wall, you're on a tight timescale, or you're fitting out a loft conversion or garage conversion.

Either works if: the wall is clean, dry block or brick in reasonable condition. In this case it comes down to budget and preference.

Not sure? That's what the survey is for

Most homeowners shouldn't have to make this call themselves. When we visit a property, we look at the walls, check what's behind them, and tell you which method we'd use and why. If wet plaster is overkill, we'll say so. If drylining is going to cause problems down the line, we'll say that too.

The survey is free, the advice is honest, and you're under no obligation. Get in touch and we'll come and have a look.