Attaching Insulation

[Lmpaden]

Can anyone tell me does the polystyrene need to seal entirely against the van wall or is it okay to have air gaps? In planning to seal the edges with foam insulation and then install reflectix over that. 
Thanks in advance.

 

[maki2]

No it does not. But you do want to be sure you have a good vapor barrier so that moisture laden air does not get into the insulated cavities. If you tape all the edges of the Reflectix along any seams between the pieces and along the outside edges tape it to the structure that will create a moisture barrier. They make special tape for that, many hardware stores carry it. Or you can use the aluminum foil duct tape if you can't find the tape made for use with Reflectix.

 

[Lmpaden]

Thank you for the reply.