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BroadHopper · 05-08-2022, 08:49 AM

John is right about air loss. Most stick-built homes have tremendous air loss!
You can check with NH Energysaves for reliable energy audits on your project.

This excerpt is from one of the top builders in North America. Gives you an idea what the latest trend. The build is so airtight, that an air exchanger is needed to keep the air fresh.

Our cellulose is made from recycled newspaper and shipping boxes, which is an excellent way to upcycle unwanted paper products. The cellulose is densely packed into every panel and does not settle during shipping because it is already so heavily compacted. In addition to being a great use of recycled paper, cellulose has superior insulating, sound deadening, and fire resistance properties compared to fiberglass.

We also prefer cellulose insulation because of its hygroscopic properties, which means it is very good at managing moisture and works with other layers in the panel, including the smart vapor permeance of the OSB (oriented strand board). This semi-vapor open assembly allows for drying in both directions, making it ideal for all climates. Our building systems rely on continuous mechanical ventilation to manage interior humidity.

In comparison, fiberglass insulation is hydrophobic, meaning that it repels moisture, which then gets absorbed into the wood around it and often results in mold.

Our air-tight building assemblies are designed to optimally manage moisture to keep bulk moisture out and the amount of vapor that diffuses through them, is very low.

05-08-2022, 08:49 AM	#6
BroadHopper Senior Member Join Date: Oct 2004 Location: Laconia NH Posts: 5,512 Thanks: 3,118 Thanked 1,090 Times in 784 Posts	Air loss John is right about air loss. Most stick-built homes have tremendous air loss! You can check with NH Energysaves for reliable energy audits on your project. This excerpt is from one of the top builders in North America. Gives you an idea what the latest trend. The build is so airtight, that an air exchanger is needed to keep the air fresh. Our cellulose is made from recycled newspaper and shipping boxes, which is an excellent way to upcycle unwanted paper products. The cellulose is densely packed into every panel and does not settle during shipping because it is already so heavily compacted. In addition to being a great use of recycled paper, cellulose has superior insulating, sound deadening, and fire resistance properties compared to fiberglass. We also prefer cellulose insulation because of its hygroscopic properties, which means it is very good at managing moisture and works with other layers in the panel, including the smart vapor permeance of the OSB (oriented strand board). This semi-vapor open assembly allows for drying in both directions, making it ideal for all climates. Our building systems rely on continuous mechanical ventilation to manage interior humidity. In comparison, fiberglass insulation is hydrophobic, meaning that it repels moisture, which then gets absorbed into the wood around it and often results in mold. Our air-tight building assemblies are designed to optimally manage moisture to keep bulk moisture out and the amount of vapor that diffuses through them, is very low. __________________ Someday may never be an actual day.