All material copyright David White. These are free for all to use, but none may charge money for them.
More insulation is generally better for combating climate change, but not always. Some insulations have high embodied energy, and heating systems and fuels are getting cleaner. Most influential is that some foam insulations have an extremely high embodied GWP due to the blowing agents used. This calculator will help you understand the GWP implications of insulation choices. The Excel file is locked to make it safe from accidental errors. If you want to unlock it, the password is "unlock."