Celotex offer pir thermal insulation boards in various thicknesses for new build and refurbishment applications for both the commercial and domestic sectors.
Celotex tuff r insulation board.
On tuff r insulation one facer is a continuous sheet of aluminum foil.
It installs easily over osb or non insulated sheathing and directly over wood studs.
The other is a tri plex facer consisting of a three ply laminate of durable kraft with aluminum foil on both sides.
Celotex thermax as illustrated by your first photo above was and is currently as a dow thermax product a foil faced insulating board comprised chiefly of foam insulation laminated with aluminum foil or possibly kraft paper.
Celotex tuff r ga4000 is a multi purpose rigid polyisocyanurate foam pir thermal insulation board with reflective foil facings that are uniquely reinforced with glass fibre and feature a strong reaction to fire performance when measured in accordance with new european standards.