Hi @Bram1987 ,
Nick here from Shopify just following up from Ann’s reply above.
I can see exactly what you mean by it making sense to be able to exclude certain items from free shipping. This is still something that isn’t available as Ann mentioned. What I will do however is send another feature request on your behalf. The more store owners who discuss a feature like this help its cause for future development. Thank you for your feedback and letting us know why it would be beneficial for you and your store.