Recently Penta started using another type of foam offered by BASF called Walltite XL. This spray foam in intended for residential, commercial, industrial and institutional building applications where insulation is required. It can be used above or below grade, for interior or exterior building envelope applications including; exterior, cavity and foundation walls, between steel or wood framing, under floor slabs, in cantilevered areas and in specialized applications.
The advantage with XL is that it can be sprayed up to 5” thick in one pass allowing quicker installation than regular 2 lb density foams which have to be installed in 2” passes with cooling periods in between.
This is a big advantage if access to the area of work is difficult such as high vaulted ceilings, scaffolded areas, tight spaces under buildings etc. Or also filling cavities that are very difficult to spray with a 2” pass. Can cut labour in half or more.