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Tongue and Groove knotty pine porch ceilling

47K views 66 replies 23 participants last post by  Gough 
#1 ·
What do you guys think for a Tongue and Groove knotty pine porch ceiling in New England in October.

Spot prime knots with 2 coats of BIN (and there is a lot of them)
1 Full coat of Cover Stain
2 Coats of a low luster latex (probably close to a sky blue)

Would a coat of the BM 094 tinted blue over the Cover Stain be overkill?

Everything will be brushed.
 

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#49 ·
Spot primed the knots with shellac and bin because I thought that would stop the knots from bleeding through the best.

Again, I did this ceiling last November. I checked it a week or so later and it looked great.

Here are some pics of the ceiling now. What happened:eek:
 

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#50 ·
I'm thinking about another quick spot prime with bin where any knots bled through bad. Then rolling with something like a Fresh Start latex stain blocking primer. And then an top coat of some latex satin finish. That's Regal Select satin up there now.

Don't want to brush it all out again and may just try to roll it.
 
#55 · (Edited)
So let me get this straight... the knots bled through and even though you couldn't really see it, the areas became tacky like a fly trap and all those insects just stuck there.

If I just re-prime with a latex primer and then put on a fresh coat of paint, I will probably end up with the same results?

Once I wash down and prep the ceiling It will be hard to even see where the knots are, never mind sealing them with glue.

BTW.. all those dark spots in the pics are insects, not necessarily knots.
 
#58 ·
If it is fly s*&t it seems like it should not be something that you would be responsible to fix. And, that the HOs will just have to paint the ceiling a different color on which the feces will not show as much like a brown or black. I just painted a ceiling about the same color and it had a lot of black dots all over it, but if I recall they were dead bugs.
 
#62 ·
Just had another look at your pics and it sure looks like all those dots are bug crap. There may be knots burning through as well but I can not tell from the pic. Bottom line ...not your problem, tell HO to leave that ceiling light off ! By the amount of shrinkage (gap) between one of the boards it looks like its been awhile since that was painted.
 
#63 ·
By the amount of shrinkage (gap) between one of the boards it looks like its been awhile since that was painted.
It's been only 10 months since the original paint job. I used SW SherMax Elastomeric. I put it on thin and wiped it down good. It was pretty cold when I did it so maybe that affected the caulk a little.

In a couple of weeks I will really give it a good washing down and see how it looks.
 
#66 ·
I agree plantation grown wood has less than 2/3 the growth rings per inch of traditional wood. This means there is a lot of soft areas that will shrink dramatically. Conversely even if they are dry when installed they absorb more moisture form the environment if not pre-finished.

It is very important to check moisture levels.
 
#67 ·
Thanks for the reminder about the plantation-grown material. We've seen some P. radiata trim boards with huge growth rings.

This is just another reason to try to work with knowledgeable, conscientious builders who know both to give the material a chance to reach a stable MC and give the painter a chance to backprime it before they install it.
 
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