To choose the best continuous insulation for your project, analyze all of the variables: performance needs, climate, building codes, and budget. No matter which continuous insulation you choose, proper installation is critical to achieving the desired performance.

Fire-stopping prevents the spread of fire from one space or room to another. It can function as a sealant at any axis where fires are most likely to spread, such as ceiling joists, wall-to-wall connects and points at which the wall joins the floor.

This new addition to the FACTS Sheet library outlines how using foam plastic insulating sheathing (FPIS) as continuous insulation (ci) for energy code compliance provides some key advantages to consider in these areas.

Rigid insulation built tight to a foundation wall exposes no draft opening, so no fireblocking is necessary. If you read 718.2.2 to 718.2.7, you'll notice that every scenario involves potential air void that drafts can traverse without interruption.

Some noncombustible insulation such as mineral wool actually resists fire and aids in the firestopping process. However, low-density polymer foam insulation, for the same reasons noted above, can be much more challenging to firestop.