Frost doesn’t do much damage to homes while it's frost, but when it melts, and it will, then it creates a big mess. When the frost melts, typically there is enough water to saturate the insulation in the attic. This in-turn will eventually soak down and leave stains all over the ceilings. This is the first sign of a bigger problem in the attic. The long term problem is the continual saturation of the roof decking will cause the plywood on the roof decking to delaminate; when this happens, it loses a lot of it’s strength and nails are much more prone to pulling out. The only repair for a delaminated roof decking is to replace the entire roof! Which can be very expensive. With a "sprayed" attic the foam acts as a unique air and moisture barrier. The "Two Pound closed Cell" does a much better job of making the home airtight, and is better than any other type of insulation. It’s also resistant to mould growth, unlike fibreglass and cellulose, which are not. Cellulose and Fiberglass insulation can trap unwanted moisture and organic material, and may eventually support mold growth.
Closed-cell foam is the highest-R-value insulation material available, at up to R6 per inch (the higher the R value of a material, the greater its resistance to the movement of heat). “Using thermal imaging cameras with a blower door, it’s not uncommon to see missing pieces of fibreglass or a two-inch gap between batts where heat can be lost,” Because 1stFoam sprays the insualtion gaps and missing areas are much less likely to happen.
The attic has to "breath", it's essential for a safe and healthy home. There are many passageways for warm air to leak in to the attic. Some of the more common areas to find these leaks or insulation gaps are tpically around furnace vents, plumbing vents, electrical boxes, and areas where electrical wires come in to the attic. Any Bathroom fans, kitchen fans, and clothes dryers that vent through the attic space will absolutely wreak havoc as well. Even smallest of gaps in any of these vents can bring a lot of moisture in to the attic. Did you know that 3 to 4 inches of closed cell spray insulationwill keep condensation from occurring. Thats equal to 15 inces of blown cellulose!
Icicles on the inside?
This is an absolute tell tale sign that you need to take action! You need to introduce ventilation into the attic as soon as possible. It would be strongly recommend that you talk with an insurance restoration contractor who has power fans and dehumidification equipment. If you have trapped enough moisture up there that you are seeing icicles, it is probably something that needs to be dried out with more aggressive methods than just the normal passive ventilation. The old insulation needs to be removed. Finally, make sure all of your exhaust fans are vented all the way out of the attic. AS you can see in the picture, a vent pipe has come loose and has created the moisture icicles in the attic.
Are there any drawbacks?
Not all green Well-insulated homes are eco-friendly, but the insulation itself isn’t. Polyurethane spray foam products may contain soy, vegetable oil or recycled bottles but they are primarily made of oil or petroleum.
Eventually the frost will melt!
We have all "spilled" a glass of water and observed how quickly it spreads out, a little bit of water can creat a large stain and puddle of mold. Once the mold takes hold then you have to take action to preserve your health and the value of your home.
Spray foam will make your home airtight, but whenever spray foam is installed in a home, it's very important to evaluate the amount of fresh air that comes into the home, an HRV which stands for Heat Recovery Ventilator, may be required. The HRV does a simple job it simply exchanges indoor air with fresh outdoor air. The HRV also pre-heats the air that comes in from outside, by using the air that’s being exhausted. That process recovers up to 88 percent of the heat that already exists. But don't worry the HMV utilizes a Electronically Commutated Motor (ECM), the amount of electricity needed to run the HRV is minimal, and may not be needed at all. Your 1stFoam technician will determine your requirements.
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