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Revolutionize Your Home with Fibreglass Blown-In Insulation: The Ultimate Guide

Table of Contents
1. Introduction
2. Benefits of Fibreglass Blown-In Insulation
3. Comparison of Fibreglass and Cellulose Blown-In Insulation
4. The Process of Installing Fibreglass Blown-In Insulation
5. Q&A
6. Conclusion

Introduction
Fibreglass blown-in insulation has emerged as a game-changer for homeowners seeking to boost comfort, cut energy bills and shrink their carbon footprint. Unlike traditional batt insulation, this loose-fill material is blown into attics, walls and crawlspaces to fill every nook and cranny. In this guide, we’ll explore how fibreglass blown-in insulation works, why it outperforms other options and how you can install it to revolutionize your home’s energy efficiency.

Benefits of Fibreglass Blown-In Insulation
High R-Value per Inch
Fibreglass blown-in insulation delivers an R-value of around 2.2 to 2.7 per inch, providing excellent thermal resistance. By creating a continuous layer of insulation, it helps maintain a steady indoor temperature year-round, reducing the workload on your heating and cooling systems.

Superior Air Sealing
Because the loose fibres conform to irregular spaces, fibreglass blown-in insulation seals gaps around pipes, vents and wiring more effectively than rigid batts. Eliminating drafts not only boosts comfort but also stops heat loss in winter and keeps unwanted heat out during summer.

Moisture and Fire Resistance
Fibreglass is inherently non-combustible and does not absorb moisture. This reduces the risk of mold and mildew growth, protects wooden framing and adds an extra layer of fire safety to your home.

Sound Dampening
The dense yet lightweight fibres absorb sound waves, reducing noise transmission between rooms or from outside. For multi-story homes or houses on busy streets, fibreglass blown-in insulation can create a quieter, more peaceful environment.

Eco-Friendly Composition
Most fibreglass insulation contains up to 60% recycled glass, making it a greener choice. Its long lifespan and energy-saving capabilities further lower your home’s environmental footprint.

Cost-Effectiveness
Though installation can be slightly more expensive than loose cellulose initially, the long-term savings on energy bills and reduced maintenance costs make fibreglass blown-in insulation a sound investment.

Comparison of Fibreglass and Cellulose Blown-In Insulation
Thermal Performance
• Fibreglass: R-value 2.2–2.7 per inch
• Cellulose: R-value 3.2–3.8 per inch
Cellulose typically has a higher R-value, but fibreglass’s superior air sealing often offsets this advantage in real-world applications.

Moisture Handling
• Fibreglass: Does not absorb moisture, resists mold
• Cellulose: Treated with borate but can settle and retain moisture over time

Fire Safety
• Fibreglass: Inorganic and non-combustible by nature
• Cellulose: Requires chemical treatment, may emit smoke in extreme heat

Installation and Settling
• Fibreglass: Light, fluffy fibres resist settling
• Cellulose: Denser, prone to settling without dense-pack installation

Environmental Impact
• Fibreglass: Up to 60% recycled glass content
• Cellulose: Up to 85% recycled paper content
Both options are eco-friendly, but fibreglass may offer longer lasting performance with less risk of compaction.

The Process of Installing Fibreglass Blown-In Insulation
1. Preparation
• Clear the work area of debris and stored items.
• Seal large gaps and install baffles at eaves to maintain ventilation.

2. Equipment Setup
• Position the blowing machine outside or in a garage.
• Connect the hopper to a long hose that reaches the attic or wall cavity.

3. Blowing the Insulation
• An operator feeds rolls or bags of fibreglass into the hopper.
• The machine shreds and propels the fibres through the hose.
• An assistant directs the hose into each joist bay or wall cavity, ensuring even coverage.

4. Depth and Density Checks
• Use depth markers or rulers to confirm the required insulation thickness (typically R-38 to R-60 in attics).
• Adjust machine settings to achieve the correct density without overpacking.

5. Finishing Touches
• Trim any excess insulation at framing edges.
• Inspect for gaps or low spots and add material as needed.
• Clean up stray fibres and secure access points.

Q&A
Q: How long does fibreglass blown-in insulation last?
A: With proper installation and moisture control, fibreglass blown-in insulation can last 50 years or more without significant degradation.

Q: Can I install fibreglass blown-in insulation myself?
A: While DIY kits exist, professional installation ensures correct density, full coverage and compliance with building codes.

Q: Is fibreglass blown-in insulation safe for my family?
A: Modern fibreglass is manufactured with non-itch binders and does not off-gas. Proper protective gear during installation minimizes skin or respiratory irritation.

Conclusion
Fibreglass blown-in insulation offers homeowners an effective, eco-friendly way to revolutionize their home’s comfort and efficiency. By combining high R-values, superior air sealing and moisture resistance, this versatile insulation outperforms many alternatives. Whether you’re upgrading an older house or building new, consider fibreglass blown-in insulation to lower utility bills, reduce noise and protect your investment for decades to come.

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