Dear all, We are assessing a renovation project according to LEED v4.

Buildings LCA is conducted to measure the impact of building materials..as well as building use etc.

Option 2 states: Recycled content. Recycled content is the sum of postconsumer recycled content plus one-half the preconsumer recycled content, based on cost.

In the past 6 months we have noticed that a high recycled content of 70% or more has been required on acoustic ceiling tile.

I have a question regarding option 1. The GRI report for a product does not address the raw material supplier extraction location.

The default materials calculation is 45% of construction costs (Div 3-10 primarily). Is there a generally accepted percentage of project costs that is considered to be construction costs?

The alternative documentation process for FSC as described in V4 on page 534 is confusing: The issues in particular are: - The woodworker must install the product.

The reference guide states that, "Products and materials that do not meet the location radius but do meet at least one of the sustainability criteria are valued 100% of their cost (i.e., the valuat