Steps For Garage Door Insulation
                     How To Insulate A Garage
Door?
While numerous reasons are there for insulating your garage door, the
significant reason for insulating them is you spend a lot of time in there.
Opening a window or using a fan can assist in moving air, but it won't
keep heat out; thus, it does nothing to create a pleasant environment. Here
we have enlisted the simplest techniques to insulate the garage door to
help you make an ambient place for whatever you're doing there. You can
employ  an  experienced  garage  door  company  in  Sacramento For
quality insulation.
Step-by-step guide for insulating the garage door
• Gather Your Materials:
Keep the following components handy for the garage door insulation:
• Four foil-faced foam board sheets
• A knife or blade for cutting the foam board
• A yardstick or measuring tape
• Measure and Cut:
Once you've acquired all your supplies, measure each panel frame's size
in the door. Subsequently, cut the foil-faced foam board into rectangles by
adding approximately an inch to the shorter dimensions to slightly larger
the panels than the door's real frame so that they are convex and bend
outward when you put them in.
Doing so is imperative, as without the air gap, the foil won't function as a
radiation barrier, and you will end up squandering your time and effort.
For more clearance, you may read why the radiation barrier foil requires
an air gap to function. Therefore, putting the foam flush against the door
isn't nearly as effective as creating the air gap. Note the prime goal of this
strategy is to limit summer heat gain. While reducing heat loss has some
advantages, the main impact will be in terms of lowering heat from the
sun hammering down on the door.
While installing the foam boards in the frames, position them in a way so
that the foil side faces the garage door and the little air space generated by
the convex shape. Commence by first placing the top edge, followed by
the  bottom  edge.  Ensure  the  panels  should  be  convex  and  have  a
perceptible outward curvature when you see them from the side.
• Final Step:
After finishing, the installed radiant barrier is your first defense line after
the  metal  door,  while  the  foam board  helps  slow down any heat  that
penetrates the foil. Now, enjoy a brighter and more pleasant garage door
that is appropriately insulated, keeping your summer heat radiation out.
• Finishing Touches for Your Insulation Project:
Consider replacing the rubber sweep on the door's bottom to get the most
out of your garage door insulation Job. Install weather stripping around
the garage door's edges to preclude ice draughts from entering. Although
door insulation is indispensable, you can enjoy more heat absorbance if
the whole garage is covered too as non-insulated roofs or sidewalls may
allow heat to escape.
The Bottom Line
Installing  weatherstripping,  a  threshold  seal  at  the  door's  bottom,  and
adding batt insulation in exposed stud walls should be done along with
insulating the garage door. Additionally, since some garage doors contain
gaps  around  the  door's  edge,  they  must  be  sealed  before  making  the
garage door suitable for winter.
Source: 
https://www.storeboard.com/blogs/business/how-to-insulate-a-garage-
door/5582292