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Therma-Tru fiberglass Double Entry prehung door - how to install an entry door

New installation of six foot Therma-Tru fiberglass Double Entry front doors.


This new entry door system was installed in approximately 6 hours from start to finish and features the light we quality of fiberglass foam filled to meet Peak Energy Efficiency and also offers an attractive exterior rustic wood look.

Because this is a custom install door which measures at 73 and 1/2 in wide the existing opening had to be slightly modified by reducing left and right number one Jack studs buy quarter of an inch each way this allows for full clear installation of the door with additional room to properly insulate using fiberglass insulation.

The exterior is then completed by adding custom aluminum-clad rapping over the existing manufacturers brick molding.

Double entry doors are specialty door and every measure should be taken to ensure a level plum and properly aligned installation.

Because of the bulk weight of the door unit I recommend removing left and right operating panels from the manufacturer's pre-hung Jamb. Then the box frame provided by the manufacturer can be easily installed and manipulated to 90% perfection. Once the door jamb is properly installed the left and right operating door panels can then be reattached for a dry run or demo test of the installation of the jamb.

Once the door panels are reinstalled Minor Adjustments or tweaks two level flush and plane can be accomplished to ensure maximum utility of the door and to ensure through shaming that the door tolerances are that of the manufacturers expectations to provide an airtight closure.
Once your adjustments and tweaks are completed you may send home any fasteners to permanently Mount the frame and then insulating and finishings applied to the door.

For detailed tutorial on how to install any double door were any prehung exterior door please follow the YouTube link below as this easy 10 step guide will make any door you install operate perfectly every time.



therma tru double fiberglass doors


Quality Installation
"Do it Right...Do it Once"

1051 Ladner Ave. 
Gibbstown, NJ 08027
856-956-6425
vdramis@yahoo.com