Currently have an X-30 as high up in the loft as I can get it (unless I drill a hole in the roof, might cause a few problems

Sticking it outside requires diplomacy with "she who doesn't like wires and stuff". Hence the X-30.
Just wondering if someone has moved the same-ish antenna from the loft to outside and noticed a practical difference. I spent ages googling roof tile attenuation etc but there's no definite answer unless it's 2.4GHz, other than "wet doesn't help". True.
TIA,
Mat.