Building Walls for Boiler Room?

[Joukko]

I am expanding the boiler room so I can fit a large accumulator tank. There will be 2 new walls added. Now I wonder how I should fix this? On the side I am expanding, the existing wall will remain standing. Do I need to have drywall on the inside? I was thinking of going with plastic first, then insulation, asphalt board, and finally outer panel in that case. So do I need drywall on the inside? There will be more insulation around the tank.

Jocke

 

[Mats]

It is a question for fire protection/chimney sweepers in your municipality how they view the issue. They make different interpretations in different places, making it difficult to say something general.

 

[Joukko]

Since the existing wall remains, it shouldn't be a problem. It's the two new walls I'm wondering about. The small wall might be a bit tricky to get plastic on, though.