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475 VIDEO: INTELLO Plus with Dense Pack Cellulose

475 VIDEO: INTELLO Plus with Dense Pack Cellulose With the crew of cellulose professionals at National Fiber on a visit to their headquarters in Belchertown, Massachusetts - we demonstrate the installation of excellent thermal insulation, vapor control and airtightness - without foam.  Working with National Fiber Cel-Pak dense pack insulation … read more

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Reason Foam Fails #3 - Degrading Thermal Insulation Values

Reason Foam Fails #3 - Degrading Thermal Insulation Values

Reason Foam Fails #3: Degrading Thermal Insulation Values Polyisocyanurate (polyiso), XPS, and spray closed-cell foams substantially degrade over time as the insulating blowing agent gases diffuse out and plain air diffuses in.  How much does it degrade and at what rate?  To answer, industry has come up with something called Long Ter … read more

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Foam-Free DER: Wall & Foundation Assemblies

Foam-Free DER: Wall & Foundation Assemblies In this post we examine the deep energy retrofit (DER) of existing wall & foundation assemblies. As we outlined in Foam-Free DER: Series Introduction (here), we are looking at the recommended assemblies provided in the Mass Save Deep Energy Retrofit Builder Guide (the Guide), and offering … read more

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Foam-Free DER: Series Introduction

Foam-Free DER: Series Introduction The deep energy retrofit (DER) is essential to our low energy building future - as most all buildings that will exist (in our lifetime) do already exist.  The most authoritative DER guide for  the Northeast is the Mass Save Deep Energy Retrofit Builder Guide.  (the Guide)  Download the Guide here (pdf). … read more

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Foam-Free Wall Assembly Guidelines by Climate Zone

Foam-Free Wall Assembly Guidelines by Climate Zone Spanning eight climate zones, from very hot and humid to subarctic, and desert to rainforest, the US presents widely varied demands on our building enclosures. Anecdotally, there is much written on assemblies in cold climates but not so about hot climates. And most of the literature today as … read more

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Reason Foam Fails #1: Dangerous Toxic Ingredients

Reason Foam Fails #1: Dangerous Toxic Ingredients

Reasons Foam Fails #1 Dangerous Toxic Ingredients The chemical companies selling polyurethane foam as green and sustainable, demonstrate chutzpah second only to that of the tobacco and coal industries. Admittedly, if you believe in “clean coal”, foam might be what you’re looking for. But if you didn’t believe the tobacco scientists … read more

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