Can a urine micro albumin 14mg/l show a slight damage to kidney for a diabetes type 1?

Normal. Urine microalbumin concentrations of less than 20 mg/l are considered normal.
No. Albumin level in urine < 30 mg/dl is considered normal and can be present in normal individuals. Albumin level of more than 30 mg/dl is an early sign of diabetic kidney damage. Annual Albumin level in urine is recommended in patients with diabetes.