I have 3 questions concerning the the HiTemp mortar mix.
1.) Although the plans say not to fill in voids in the interior with HT mortar mix as it will just ultimately fall out. I unfortunately have some large gaps in the ceiling interior. I apparently did not pack it well enough when installing those rows.
2.) From other upthread posts I’ve read about water getting into the oven. Should I proactively laid a bead of the high temp calk around the the perimeter (3 sides of the hearth connection to the fire brick and also to the perimeter of the chimney before installing the final brick finish?
3.) Lastly on the front of the oven I left a 1" reveal of fiber blanket on the fire brick per the plans. I am applying a fan like finish to the front façade using brick splits. Should I be filling that gap with the hiTemp mixture before attempting to install the splits?