: You can find series-specific PDFs (e.g., Series 105 or 150) on the ReliaBilt Installation Support page .
: Apply additional silicone sealant to the top and bottom of the mull joint, filling any voids. If your kit includes a drip cap or mull bridge , install and seal these over the top and bottom exterior joints. Helpful Resources reliabilt-window-mull-kit-instructions
: If your windows have nailing fins or J-channels on the sides being mulled, remove them using pliers or a utility knife to allow the frames to sit tightly together. : You can find series-specific PDFs (e
: Lay the windows side-by-side on a flat surface. Use a utility knife to trim any excess vinyl "welds" or protruding edges from the corners where the windows will meet to ensure a flush fit. Helpful Resources : If your windows have nailing