COLD STORAGE INSULATION

This specification is intended as a guide in the installation of Fibreglass Cold storage insulation (CST) for cold storage operating at temperatures ranging from 400F to - 400F.

  Application procedure
A
Walls and Ceiling
1
Clean the surface to be insulated.
2
Apply two coCts of hot bitumen
3
After the second coat has cooled down but it is tacky, fix 500 g polythene to the surface with 3" overlaps.
4
Fix wooden pegs and battens at 4’0" centres
5
Friction fit Fibreglass CSI of specified thickness between the battens
6
Fix 20g x ¾" mesh expanded metal to the batten
7
Apply ½" thick sand cement plaster
            i      For thickness upto 3", wooden pegs can be fixed at 2’0"
            i      Upto 3"thickness Fibreglass (CSI) can be applied in a single layer.
 
B
Application of Asbestos Sheets to the ceiling instead of cement plaster
1
.Clean the surface to be insulated.
2
Apply two coats of hot bitumen
3
After the second coat has cooled down but is still tacky, fix 500g polythene to the surface with 3"overlaps.
4
Fix wooden peg at 4’0"centres between the battens, the length of this peg will be 1"less than the thickness of the insulation
5
Friction fit Fibreglass CSI of specified thickness between the battens
6
Fix 1 ½" x 1"battenns with 1 ½" x 1 ½" notches cut at every 2’0" across the main battens. These battens should be fixed with screws to the battens as well as centre pegs.
7
Fix 4 mm flexible Asbestos Sheets with brass screw covering the joints with 1"shaped wooden strips, also fixed with brass screws.
   N.B : This method of fixing can also be adopted for the walls provided guard rails or supports are provided to protect the sheet from             damage. This application should not be used where the walls are to be hosed down with water.
   
C
Floors
1
Clean the surface to be insulated
2
Apply hot bitumen and fix 2 ply tarfel with 3" overlaps sealing all joint sealing all joints with hot bitumen.
3
Fix wooden pegs and battens at 2’0" intervals
4
Friction fit Fibreglass CSI between the battens
5
Fix ½ " shuttening plywood
6
Fix floating layer of 2 ply tarfelt with 3" overlaps sealing all joints with hot bitumen
7
Apply reinforced concrete screed
   N.B : The thickness of shuttering plywood can be reduced depending on the total loading capacity of the floor.