2400 Health
The item id for Frost Armored Roof in unturned is 36230. You can use this ID with the commands below to spawn the item, give it to a player or buy it on a modded economy server.
Useable: Structure
Has_Clip_Prefab: false
Construct: Roof
Size_X: 2
Size_Y: 2
Health: 2400
Range: 8
Explosion: 36
Blueprints: 1
Blueprint_0_Type: Structure
Blueprint_0_Supplies: 2
Blueprint_0_Supply_0_ID: 36226
Blueprint_0_Supply_0_Amount: 1
Blueprint_0_Supply_1_ID: 36195
Blueprint_0_Supply_1_Amount: 3
Blueprint_0_Tool: 36090
Blueprint_0_Level: 3
Blueprint_0_Skill: Craft
Blueprint_0_Build: 27
PlacementAudioClip: Items/Structures_Armored/Frost_Armored_Pillar/Use.wav