I have done RF work for many years. And have seen bad signal due to to little signal, and also too much signal. I agree with Larry on the try it and see what happens, but, I would use a 4-way right of the bat. That way, you lose it all up front, and if you need, you can add an amp just before the splitter to make up for the loss.

If you have very low RF level at the antenna, then you want to use a Preamp as Larry suggested, this will allow you to amplify the small signal at the source, instead of after the cable run to distribution, thus solving the 'amping the noise' issue that is pretty common in RF.

Just remember, RF is FM (F#$#'in Magic) and can get pretty tricky. I would try multiple spots before you anchor the antenna down, you can have drastic level differences even in a couple of feet.