I am a consultant and use a room in my home as an office, can I deduct the insurance deductible I paid to replace my roof due to hail damage

Yes, you can deduct a percentage of the deductible that you paid to replace your roof.  The percentage would be based on the space you use for your office regularly and exclusively to the entire size of your house.  So if your office takes up 10% of your total home, you would be able to deduct 10% of the deductible you paid. 

Business Use of Your Home