07 2500 - Weather Barriers

4specs has separated weather barriers into vapor resistive and vapor permeable barriers and into sheet applied and fluid applied systems. Typically these are for walls.

07 2600 - Vapor Resistive Barriers
07 2700 - Vapor Permeable Barriers
- 07 2730 - Sheet Applied
- 07 2760 - Fluid Applied
07-5000 - Roofing Moisture Barriers - typically will be in the membrane manufacturer's website
07 2800 - Rainscreen Drainage Systems
- 04 0530 - Masonry Flashing and Specialties - for rainscreen drainage behind brick
- 07 2800 - Rainscreen Drainage Systems - typically installed behind siding and stucco

In addition, 4specs classifies other weather barrier systems by use methodology:

03 0555 - Concrete Admixtures/Additives - Vapor retarder products added to the concrete mix
03 0580 - Under-slab Vapor Retarder Membranes - Sheet membranes applied under the concrete slab
06 1650 - Exterior Sheathing - used as part of the weather barrier with taped joints
07 2127 - Enclosed Cavity Foamed Insulation - Typically used stud walls and cathedral ceilings
09 6105 - Vapor Control for Flooring - Materials applied over a completed slab to reduce vapor transmission, other than as a component of a fluid applied floor system.
09 6700 - Fluid Applied Flooring - For vapor retarding materials applied as part of the fluid applied flooring system.