I have a cabin with a metal roof and plywood underlay and want to use compressed Styrofoam to insulate between the rafters.
Do I need a moisture barrier and how would I install this?
Do I need a moisture barrier when insulating a metal roof with compressed Styrofoam
insulationroof
Related Topic
- What kind of insulation should we put under new tin roof
- How to correctly install metal roofing over a workshop with a vaulted/exposed ceiling
- Water – Best Practices for Metal Roof Directly on Existing Shingled Roof
- Insulating a cathedral roof with rigid foam
- Do I need a moisture barrier outside the garage wall insulation
- Bathroom Renovation – Adding Moisture Barrier Over Insulation: Guidelines
- Roof Insulation – How to Insulate Metal Roof on Shed and Avoid Condensation
Best Answer
If by Styrofoam, you mean rigid foam insulation like this or this you do not need to add a vapor barrier as the rigid Styrofoam sealed with chemical sheathing tape like this will do the same job.
The important point is that any an all seams are sealed by the tape to create a water, and air tight seal.