How to install double doors properly. 1. Remove existing door & frame 2. Set new frame. Ensure there is silicone under the sill to ensure weather tight doors. 3. Use shims to make frame square & plumb in opening. 4. Pre-drills holes in frame using a wood bit. 5. Drill holes for tapcons in block wall with masonry bit. 6. Secure frame using tapcons. Ensure there are shims at every tapcon location to avoid frame warping (this will affect the swing & reveal of the door). 7. Install door slabs. Ensur