Experience is fine- but your experience is limited by what your employer throws your way.
Education is also critical...especially if you want to get into the parts of the trade that can't be learned by rote.
If, in three years, your employer has not seen fit to enroll you in a formal apprentice program, with structured classes in the evening...well, you really deserve a better employer.
In lasting three years, you've shown a fair amount of reliability and stability- traits that are in demand. Soone spring will be here, and the seasonal work will pick up. Now is the time to approach various employers, setting the stage for moving over when work picks up.
I'd write prospective employers a note, explaining your experience and goals....and asking if they would consider talking to you in person. It worked for me.....
