When drywalling a room, should I do the ceiling before the walls?



Is there any value in installing drywall (plasterboard) on the ceiling before the walls or does it not matter?


Posted 2014-07-01T14:18:01.347

Reputation: 546

Just for completion, I did both blocking and ceilings first. I also used many, many screws. My plasterer commented that he had never seen so many screws used, but did not answer when I asked him if that was a good or bad thing. :) Not really THAT many, but definitely more than normal.TravisPUK 2015-09-05T08:58:09.953



If you do the walls first, you can end up with drywall that is unsupported along an entire edge.

Taking these walls for example.

Example Wall

Walls First

If you add drywall to the walls.

Drywall on Wall

Then add drywall to the ceiling.

Drywall on Wall and Ceiling

The ceiling drywall will be unsupported along the entire length of the one wall.

Unsupported Drywall

Ceiling First

Given the same walls. If you add drywall to the ceiling.

Drywall on Ceiling

Then add drywall to the walls

Drywall on Ceiling and Walls

The ceiling drywall will be supported by the wall drywall.

Supported Drywall

Blocking, or Extra Framing

If you add blocking; or some other framing, it shouldn't matter which you drywall first.

Extra Joist


Posted 2014-07-01T14:18:01.347

Reputation: 110 876

1Even if you hang the ceiling first, not having blocking behind it along a wall is a very bad idea. Just imagine someone pushing upward on the ceiling.Daniel 2016-07-17T05:34:58.883

1Awesome answer Tester101. I do have blocking so I would be fine with support. But I do like the idea of butting the wall sheets up to the ceilings.TravisPUK 2014-07-01T17:09:00.057

Marked as answer due to the level of detail showing both sides with potential issues outlined. The diagrams also help to show the potential issues.TravisPUK 2014-07-01T17:15:01.933

2Blocking should be done no matter the order that the walls and ceiling go up.Mike Partridge 2014-07-01T22:45:48.317

4I saw this link from SO, I have no idea what drywalling means, but I am totally upvoting this because of the effort given. Kudos to you.dayuloli 2014-07-02T15:03:10.130

Fantastic effort. What software did you do the drawings with?ardochhigh 2014-07-02T15:07:46.387


@ardochhigh I used SketchUp

Tester101 2014-07-02T15:08:31.433


Indeed very nice drawing, but I think it would be far better to mention floating the corners to reduce cracking in most situations.

Phil Frost 2014-07-03T21:47:10.190


I was always told to drywall the ceiling before the walls so you can butt the wall sheets flush up against the ceiling so there is no need to fill gaps before taping the corner where they meet. If there is a gap at the bottom, that's no big deal as there is normally trim that would cover it.


Posted 2014-07-01T14:18:01.347

Reputation: 1 035

4Even if you didn't drywall the ceiling yet, you should always cover the walls from the top down. You shouldn't have any gaps between sheets that taping can't cover. If you're "filling" before taping, you're doing it wrong.Tester101 2014-07-01T15:12:38.457


Ceiling first is less work, otherwise I don't think it makes a difference.

Doing the ceiling first means you can lift the wall sheets to make a tight joint. By contrast if you do the walls first you would have to sculpt every edge to make it seat tightly, and/or end up with lots of voids to fill before you tape.


Posted 2014-07-01T14:18:01.347

Reputation: 413

Why would you have to sculpt the edges for a tight fit? Why would there be voids? Shouldn't you butt the sheet up to the sheet that's already in place?Tester101 2014-07-01T15:15:47.393

1Quite often the framing members are not perfectly in line with each other, so trying to butt one sheet into another results in gaps. Depending on the severity of the gaps, they may or may not need to be filled before taping. So yes, you can end up with such gaps whichever way you do it, but it is easier to deal with them when they are on the wall side of the joint.Rozwel 2014-07-01T17:08:24.223

5Even more often, the room dimensions do not allow for full sheets to be used without cutting. Unless you have lots of experience, drywall cuts rarely come out straight, or exactly where you want them. Most people I know cut things slightly oversize, and then shave them down to fit when trying to make a visible joint. Ceiling first means such cuts are hidden above the wall panel and require less precision/effort.Rozwel 2014-07-01T17:08:59.123


My crews going back 20 years have always done ceilings before walls. Tester has a really good answer that discusses the blocking issue but misses what I feel is the biggest piece of advice.

And that is leaving the perimeter of your ceiling drywall floating over the last 8-12 inches. You would not be able to do this without the walls holding up the drywall. By allowing ceiling to float you are gaining extra flexibility in the ceiling. Long-term this means less cracks in your ceiling and less cracks in the top corner. This is especially true for ceilings that are unfinished above (has attic above). The humidity and temperature changes will affect your gypsum board similar to the wood in your house. If you don't allow a slight buffer, it will crack.


Posted 2014-07-01T14:18:01.347

Reputation: 26 695


My expertise is in framing and it is good practice when framing to always put "nailers" in (something to nail the sheetrock or sheathing to). This is usually done by putting a piece on the flat (the larger dimension facing what is going to be nailed to it). I would not recommend using the sheetrock in the wall to support the sheetrock on the ceiling as there is still nothing stopping it from pushing upwards. You must be conscientious of the sheetrockkng and sheathing while framing.


Posted 2014-07-01T14:18:01.347

Reputation: 21

Nailers, a thousand times: yes. I've no idea what these people are talking about, using drywall to support drywall. The piece you do first is the one that doesn't eat up the nailer for the other.Mazura 2015-08-21T02:33:18.170


There are many reasons to put the ceilings up first. I can't think of one not to. Most construction is time tested over years. It is unwise to go against the flow else your jobs become problematic. I have found that out the hard way many times. So stick with the program.


Posted 2014-07-01T14:18:01.347

Reputation: 21

At the time I asked the questions I didn't have the man-power... or tools to attempt the ceiling, but wanted to get started on boarding the room. I asked the question to see if I would have any issues if I started on the walls first, something I could do. The responses though convinced me to get on to something else and wait. :)TravisPUK 2014-07-04T09:28:52.063


The biggest issue is gravity and taping. When installing the first coat of taping compound, you are putting the corner compound directly up, then covering with paper. As it dries, it creates a bump as it settles down. If you put up the ceiling first, your taping compound is filling in the joint above the wall piece, with the wall holding up the compound as it dries, not creating a bump.


Posted 2014-07-01T14:18:01.347

Reputation: 11


Doing the ceiling first is for fire safety. Fires go up, if you do the walls first then the vertical gaps left when you do the ceiling allow fires to directly heat the beams. If you do the ceiling first the gaps are horizontal and help control the spread of fire.


Posted 2014-07-01T14:18:01.347

Reputation: 1

1Can you support this with an external source?Robert 2014-07-02T21:55:12.230

Fire resistant drywall would help too, though it's rather heavyBrian 2014-07-03T13:13:46.383