Master Security Doors offers the ultimate security for your family and property. Our advanced engineering unites the finest materials with sophisticated international design, galvanized steel frame construction and ultra-strong locking systems.

Master Security Doors
Residential, Commercial, Government
and Military Security Door Systems

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Required tools and material

  • Wedge Bolts - 1/4" x 3"
  • Tapcons - 1/4" x 3"
  • Metric Allen Set
  • Hammer Drill
  • Chipping Hammer
  • Shims
  • Acrylic Caulking
  • Screw Gun
  • Counter sink Bit
  • 3/16" Masonry Bit
  • 1/4" Masonry Bit
  • Wood Chisels
  • Table Saw
  • Hand Saw
  • Saw-zaw with metal and wood blades
  • Wonder Bar
  • Safety Glassess
  • 2, 4 & 6 ft Magnetic Levels
  • Measuring Tape

  Step 1: Measuring and Preparing Rough Opening

^ Measure Sub Frame Height and Width

^ Measure Rough Opening (RO) (Be sure that it is bigger then sub frame)

Once you are sure that the sub frame will fit in the R.O you can remove the old door.

+ Be sure to check the height of the floor when installing an in-swing door.

+ Ensure that the following conditions are met:

The rough RO is plumb and level
The old frame has been completely removed
The floor is clean, dry and level

+ Because a solid sub sill is absolutely essential for proper in-stallation, do not proceed until the sub sill is both solid and level. (See figure A)

Figure A
Figure A


+ Important Points:  Although all steps are critical, this symbol identifies procedures requiring extra attention.

^ Check your work: This symbol identifies when the work should be checked for correctness before continuing.

Step 2: Installing Sub Frame  

Measure Block to Block

For Example: If you have a 40" width from block to block and your sub frame measured 38 1/2in then you will be required to install pres-sure treated wood called a buck, on each side of that is 3/4" wide to compensate for the difference. This will go for the top of the RO as well. (See figure B)

Set sub frame into opening.
+ Do not force into opening

Shim sub frame to hold into place. Make sure that sub frame is posi-tioned leaving at least 1 1/2" from edge of block to bolt fasteners. (See Figure C)

Plumb and level sub frame using shims to maintain accuracy.
+ Do not remove the balance bars

Once you have secured the sub frame and it is level and plumb fasten the sub frame starting at the bottom of either side then fasten the same side on the top using wedge bolts or tapcons. Now repeat this step on the opposite side.
+ Be sure to keep sub frame plumb at all times using shims to keep it from twisting

^ Once sub frame is fastened on top and bottom of both sides double check your work to make sure it is correct and door is plumb and level.

If work is correct continue fastening the rest of the wedge bolts or tapcons into place keeping them no more the 12" apart. (See figure D)

+You may need to drill extra holes into the sub frame to ensure that the fasteners are not more then 12" apart.

Now that the sub frame is completely fastened you can now remove the balance bars.

Figure B

Figure C

Figure D

Step 3: Installing Finish Frame Step 4: Install the Door

Caulk sub frame in and around the perimeter of frame

Install threaded plates into sub frame (See figure E)

Remove finish frame from the door, then install pressure treated wood in the sill of the finish frame, and then lay a large bead of caulk on the floor where the sill will be fastened.

Now you can install the finish frame (A rubber mallet may be needed to set frame into opening).

Fasten finish frame with 8 mm bolts in to threaded plates.
+Do not tighten bolts completely

Plumb and level finish frame. Once frame is level and plumb you can then tighten all bolts completely.

Once you have fastened in the finish frame line up your 3 hinges using your 6ft level then install the hinge pins. (See Figure F)

Figure E

Figure F

Drop door on to the hinges (See figure G)

+ Leave the door open do not close

Install all the hardware for the door i.e. door handles, peep holes, and locking mechanisms.

^ Make sure door closes and opens properly and make any adjustment necessary at this time.

Figure G
Figure G