How to install Solar Guard Insulation

SolarGuard Reflective Insulation

  • R-value: 11.6 heat flow down
  • R-value: 8.3 heat flow up
  • Enhances Rvalue and performance of existing mass insulation.


Attic heat begins with radiant heat from the sun. Radiant heat gets the ball rolling by heating the air inside the attic space. Next convection occurs as hotter air rises and cooler air sinks. As the air and contents of the attic become saturated with heat, they begin to emit heat to their surroundings. The heat emitting from those surroundings (including the fiberglass insulation inside the attic) conducts through the ceiling drywall and into the cooler living space of the home.

This scenario reverses itself in winter. Since hot air moves toward cooler air, without a reflective insulation in your attic, the heated air inside your home travels right out through the attic.

SolarGuard Reflective Insulation stops radiant heat from getting in during the summer and from getting out during the winter. Installing SolarGuard inside the attic isn’t an upgrade, its essential to controlling heat at its source. Regardless of how much insulation you have in your attic, adding SolarGuard Reflective Insulation will save on your heating and cooling expenses, and keep you much more comfortable. Energy savings for heating and cooling can vary from 17% to 25%.

SolarGuard Foil/Fiberglass/Foil Perforated Installation Instructions:

Foil/Foil Perforated SolarGuard Reflective Insulation

(There are 3 options)
Always use Foil/Fiberglass/Foil Perforated SolarGuard to avoid condensation problems
1. Underside of Rafter Method
Check the attic area and make any needed repairs before installing SolarGuard.
Using 4’ wide material, unroll SolarGuard as you work and cut it to desired lengths (8’ to 12’) with scissors.
At the eaves start material 6” above the existing insulation
Install product perpendicular to the rafters with a 2” overlap on the seams (no taping required). Staple the product to the rafters at 2” to 3” intervals.
Leave a 2” gap on each side of the roof peak
Staple to the face of the studs every 12 inches apart and on gables and insure at least a 1” gap around all vents.

2. Between Joist Application:
Use either 16” or 24” wide product (depending on rafter spacing).
Begin at the top of the cavity and work down.
Staple material with a minimum of 1” space from the roof decking material (OSB or Plywood).
At the eaves, leave 6” of space above the existing insulation.
At the ridge vent, leave at least 2” of uncovered space short of the peak of the roof.
No need to cover rafters (no loop around).
3. Ceiling Joist Application (Blanket Fashion)

Note: Dust accumulation on the product detracts from benefits. Dust (this application only) must be removed periodically to maintain effectiveness.
Cut product into 8’ to 12’ sections.
Lay directly over the top of the ceiling joists.
Cut openings in the product above any heat generating devices (ex: light mounted in ceiling).
Overlap seams 2”. Drape over any ducts close to the attic floor.
Cut around truss work as necessary.

Ventilation:
Good ventilation is essential for proper attic function. Leaving the recommended spacing at the ridge and eaves will ensure proper airflow. Be sure not to block ventilation paths when you install SolarGuard.

1 reply
  1. jim bruce
    jim bruce says:

    I am trying to do a remodel, including a roof over. I am putting a metal root over an existing composition shingle roof. Can I put the insulation between roofing felt, and metal roofing with the foil side of the insulation in contact with the metal roofing panels. The panel have 1 1/4″ ribs on 12″ centers. Will this provide adequate ventilation or am I in danger of creating mold?

    This article on puting the insulation in the attic does not say which surface is placed towards the rafter.

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