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- How To Insulate An Attic
How To Insulate An Attic: A Step-By-Step Guide
Equipment checklist: reflective tape, a utility knife and a staple gun.
Reflective tape will help you secure the insulation layers in place. Effective in dry, hot and sub-zero conditions, it creates a vapor barrier to improve the insulation’s effect. It is easy to use, resistant to sunlight and highly durable over time.
The Installment Scenarios
Scenario 1: Attaching insulation to the bottom attic rafters — convenient for both new constructions and retrofitting
Recommended Prodex type: 48 Inch, Fast Action, 10M or 72 Inch.
- Use reflective tape to bind seams.
- If you want to avoid seam taping, choose 10M or Fast Action, which have an incorporated adhesive line on one side of the roll.

Scenario 2: Installing insulation between rafters
Recommended Prodex type: 24 Inch or 16 Inch.
- Staple insulation edges to the side of the rafters.
- Leave a two-inch air gap between Prodex and sheathing to increase insulation performance.

Scenario 3: Applying insulation to the attic floor
Recommended Prodex type: Prodex Perforated
- Apply the new insulation on top of the existing insulation layers.

Scenario 4: Applying insulation during new house construction before the roof sheathing installment
Recommended Prodex type: Any Prodex Total type
- Drape insulation over the rafters or trusses.
- Make sure the insulation can drop a few inches between each rafter.
- Use reflective tape to bind the seams.
- If you want to avoid seam taping, choose 10M or Fast Action, which have an incorporated adhesive line on one side of the roll.

Prodex Difference: ICC-ES Recognized : R- value unaffected by humidity : Prevents condensation : Prevents 97% of radiant heat transfer : Vapor barrier : Elastic : Does not promote mold or mildew : Does not provide for nesting of rodents, bugs or birds : Seals around nails (no leak) : Reflective reinforced foil plus closed-cell polyethylene foam center : Keeps its shape over time (doesn't collapse) : Rippled surface increases airflow : Over 5 billion square feet sold worldwide.
Recommended insulation for your attic
Prodex: 10M. The following are excellent Prodex 5M choices: 48 Inch, Fast Action, Perforated, 72 Inch, 24 Inch or 16 Inch.
