The exterior of this type of sandwich panel is covered with colored galvanized sheet and its interior is covered with four-layer aluminum foil, and it is very popular due to the significant price difference with double-sheet ceiling sandwich panels. The applications of this type of panel are places where the interior appearance is not very important or where the ceiling will be covered with a false ceiling.

Specification table for 5-step ceiling sandwich panel, one-sided sheet, one-sided foil with polyurethane foam
Sandwich panel thickness	25 mm	40 mm	50 mm	60 mm
Thermal conductivity (w/m)	90 hundredths	45 hundredths	34 hundredths	28 hundredths
Fire resistance class	B2
Sound reduction	Minimum 10DB
Panel width (useful width)	1000 mm
Sandwich panel length	Minimum 2 meters, maximum 14 meters

Distributed load bearing table for 5-step ceiling sandwich panels, one side sheet, one side foil with polyurethane foam
Insulation thickness (MM)	Outer sheet thickness (MM)	Inner sheet thickness (MM)	Distance between openings (MM)
			100	1500	2000		2500	3000
25	50 cents	4-layer aluminum foil	141	78		55	42	33
40	50 cents	4-layer aluminum foil	282	157		109	84	66
50	50 cents	4-layer aluminum foil	350	200		141	109	78
60	50 cents	4-layer aluminum foil	434	254		182	141	92