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Looking for any advice as to what may be going on here. I'm building a new construction house through every phase of finishes. I've done drywall, amongst other things, professionally for the last 20 years.
I've used Fibafuse and Fibafuse max plenty without any issues. I use Fibafuse on flats and butt joints and Fibafuse Max in corners. I also like to use USG Lite Taping Compound for bed coat or USG Plus 3.
I hung and taped 5800 square foot ( surface, not floor sft) of drywall there last August through middle of September and I was unable to get the Fibafuse Max for or either of my preferred USG compounds due to shortages or unavailability. I was able to get the Regular Fibafuse (from Lowes) which seemed thinner / weaker / had less fiberglass strands than I'm used to seeing. I also was forced to use Proform Red Top Multipourpose compound for all coats. All research and based on fibafuses website it is appropriate for use in inside corners. I purchased a Level 5 corner roller and 3" Level 5 Angle head to set and flush the corners, then finished with the Level 5 3.5" Angle head on their corner applicator box.
Everything looked great through primer and paint which was complete by the beginning of October. This job is in a northern cold climate and the house was kept tempered around 50 - 55 degrees indoor with outdoor temperatures ranging from 40 down to 20 degrees as finishing continued.
I noticed some weirdness in one of the inside wall corners about mid November. It looked like the paint had bubbled up almost like air was pushing it out.
The beginning of December the outdoor temperatures have dropped between 35 and 10 degrees. Heat Pumps were installed and the temp has been held at a steady 67 degrees and a relative humidity in the low 40's indoors. 2 Weeks ago the ERV air exchanger was hooked up and there is a scheduled air exchange every hour.
Now almost every wall / ceiling inside corner has developed a crack. Some hairline and some quite severe. Also several vertical wall inside corners have developed the same strange paint bubbling situation.
I cut the bubbled paint away to see what was going on today, keeping the knife blade along side the paint blister and out of the inside of the corner. and there is no connection of the Fibafuse tape in the corner. As though it has completely failed. I will mention that any gap in EVERY corner was prefilled with EZ 45.
I know this is a lot of info to process but after 20 years of taping and finishing I've never seen this to this extreme. Maybe a hairline crack very rarely, but not a catastrophic failure such as this. I mention temperatures humidity and air exchange as variables in overall climate of the drywall.
Below is an example of the vertical wall corner bubbling and the wall / seiling corners cracking.
Any input is much appreciated.
![Water Sky Cloud Grey Tints and shades]()
![Wood Rectangle Fixture Tints and shades Composite material]()
![Brown Rectangle Amber Wood Beige]()
I've used Fibafuse and Fibafuse max plenty without any issues. I use Fibafuse on flats and butt joints and Fibafuse Max in corners. I also like to use USG Lite Taping Compound for bed coat or USG Plus 3.
I hung and taped 5800 square foot ( surface, not floor sft) of drywall there last August through middle of September and I was unable to get the Fibafuse Max for or either of my preferred USG compounds due to shortages or unavailability. I was able to get the Regular Fibafuse (from Lowes) which seemed thinner / weaker / had less fiberglass strands than I'm used to seeing. I also was forced to use Proform Red Top Multipourpose compound for all coats. All research and based on fibafuses website it is appropriate for use in inside corners. I purchased a Level 5 corner roller and 3" Level 5 Angle head to set and flush the corners, then finished with the Level 5 3.5" Angle head on their corner applicator box.
Everything looked great through primer and paint which was complete by the beginning of October. This job is in a northern cold climate and the house was kept tempered around 50 - 55 degrees indoor with outdoor temperatures ranging from 40 down to 20 degrees as finishing continued.
I noticed some weirdness in one of the inside wall corners about mid November. It looked like the paint had bubbled up almost like air was pushing it out.
The beginning of December the outdoor temperatures have dropped between 35 and 10 degrees. Heat Pumps were installed and the temp has been held at a steady 67 degrees and a relative humidity in the low 40's indoors. 2 Weeks ago the ERV air exchanger was hooked up and there is a scheduled air exchange every hour.
Now almost every wall / ceiling inside corner has developed a crack. Some hairline and some quite severe. Also several vertical wall inside corners have developed the same strange paint bubbling situation.
I cut the bubbled paint away to see what was going on today, keeping the knife blade along side the paint blister and out of the inside of the corner. and there is no connection of the Fibafuse tape in the corner. As though it has completely failed. I will mention that any gap in EVERY corner was prefilled with EZ 45.
I know this is a lot of info to process but after 20 years of taping and finishing I've never seen this to this extreme. Maybe a hairline crack very rarely, but not a catastrophic failure such as this. I mention temperatures humidity and air exchange as variables in overall climate of the drywall.
Below is an example of the vertical wall corner bubbling and the wall / seiling corners cracking.
Any input is much appreciated.
