No. Windscreen damage claims will not affect your NCD. Only own damage claims & 3rd party claims affect your NCD.

Does windscreen replacement affect NCD?

No, with LV= car insurance, windscreen claims don't affect your no claim discount. For example, if you get a chip in your windscreen and it needs to be repaired or replaced, you'll have to pay an excess - but you won't lose any of your NCD.

Do you lose your no claims if you claim for a windscreen?

Providing you are only claiming for the windscreen, your no-claims bonus should not be affected. However, you may have to pay a fixed amount (an excess), which is usually stated on in your insurance documentation.