Clutchcargo

I have a roof over my deck and it is just exposed dimensional lumber right now. I want to add 1x4 tongue and groove pine ceiling to give it a finished look.

I'm going to finish the boards before I install. Should I coat both sides or is one side enough? My thought is that with one side left exposed it would cause cupping... not sure.
As usual, any insight/tips/tricks is appreciated.

Thanks

__________________

de-nagorg

That is a definite possibility.

A thought that I had was that any moisture that might get in there from atmospheric condensation (dew) would cause the unfinished side to grow fungi and possibly rot faster.


ED

Clutchcargo

It's vented so I'm not too worried about rot in the roof structure and besides the other components (rafters and roof sheathing) won't be painted. I would rather put an ounce of prevention instead of a pound of redoing the roof because it cupped and looks like crap.
What is standard practice when it comes to stuff like this?

__________________

MTN REMODEL LLC

I sure would coat both sides.... easy inexpensive insurance protecting a appearance important ceiling.

(I even often paint both sides of a ship lap pine siding repairs when the siding is especially exposed/prone to moisture)

__________________
Never stop learning (xcep fer speling en typeing)

ront02769

Depends on the wood. I have tongue and grove redwood on the ceilings of three bathrooms in my house, zero finish anywhere, looking just fine thirty years later. I also I have shiplap pine in a two story forty foot long atrium that has been given a minwax stain both sides, same thing thirty years later, that is to say no worries. Ron

rander101

If the ceiling is exposed to outdoor conditions -- not necessarily rain but just to the normal, seasonal variations of temp and humidity you have a good chance of cupping if you don't paint both sides. Can't guarantee it will cup if not coated on all sides but if it does you will never be able to correct it.

ZZZZZ

Paint or otherwise seal the edges, too.
.
.

__________________
Just my 7 cents (2 cents after taxes and inflation).

carpdad

Cupping is result of wet/dry cycle, esp by sun's heat. Your 1x ceiling probably is already dried lumber and your nailing for t&g should also keep from cupping. That said, it is still outdoor condition and as stated, it is cheap insurance. Won't keep it from molding if constant moisture is allowed. You probably already know but make sure the roofing nail won't come through.

Clutchcargo

Thanks all, I'll coat both sides.

__________________