How do you increase your silo on Hay Day?

Answer 1

To increase the capacity of your silo and barn you need the proper building materials. They are as follows: the silo needs 1pack of nails, 1wooden board (not to be confused with planks, they are for a barn.) and one other item, and I forgot it. The barn needs one roll of Duct Tape, one bolt, and one plank. To upgrade, you go click on the silo/barn and click upgrade silo/barn. There it will tell you what you need and if you dont have one, you can buy one item for 8diamonds each. There you need to click the check mark and your silo/barn is upgraded.