Can blown-in insulation be added over existing insulation?
Learn when new blown-in insulation can be installed over old attic insulation.
Yuri
Last Update 2 個月前
In many cases, blown-in insulation can be added over existing attic insulation. This is a common option when the current insulation is dry, clean, and in suitable condition.
Adding new insulation over existing insulation can help improve attic coverage, increase insulation depth, and support better comfort and energy efficiency.
When blown-in insulation may be added over existing insulation
Blown-in insulation may be added if the existing insulation is:
• Dry
• Clean
• Not contaminated
• Not heavily disturbed
• Free from strong odours
• Not damaged by pests
• Not affected by roof leaks or moisture
When old insulation may need to be removed first
Removal may be recommended if the existing insulation is:
• Wet or moisture-damaged
• Contaminated by pests
• Mouldy or strongly odorous
• Heavily compressed or disturbed
• Mixed with debris or damaged material
• Blocking ventilation or access areas
Why inspection is important
Before adding new blown-in insulation, the attic should be inspected for air leaks, ventilation, roof leaks, moisture, and the condition of the existing insulation.
Adding insulation over a problem area may hide issues that should be corrected first.
Need help checking your attic?
Send us photos of your attic hatch, existing insulation, and any areas of concern. Spray Foam GL can review the information and let you know the recommended next step.
Adding new insulation over existing insulation can help improve attic coverage, increase insulation depth, and support better comfort and energy efficiency.
When blown-in insulation may be added over existing insulation
Blown-in insulation may be added if the existing insulation is:
• Dry
• Clean
• Not contaminated
• Not heavily disturbed
• Free from strong odours
• Not damaged by pests
• Not affected by roof leaks or moisture
When old insulation may need to be removed first
Removal may be recommended if the existing insulation is:
• Wet or moisture-damaged
• Contaminated by pests
• Mouldy or strongly odorous
• Heavily compressed or disturbed
• Mixed with debris or damaged material
• Blocking ventilation or access areas
Why inspection is important
Before adding new blown-in insulation, the attic should be inspected for air leaks, ventilation, roof leaks, moisture, and the condition of the existing insulation.
Adding insulation over a problem area may hide issues that should be corrected first.
Need help checking your attic?
Send us photos of your attic hatch, existing insulation, and any areas of concern. Spray Foam GL can review the information and let you know the recommended next step.