The ordinary white cable is not going to last, if you go overhead, get the UV resistant cable already suggested.
BUT, guys, it is very late to start playing this game now. Major changes are in the pipeline that will make the current XV solutions obsolete. You should very seriously consider putting in a second antenna at the cottage IF the systems are going to be independent of each other and not paired under XV.
Alternatively, XV connected decoders will need a change to the LNB and new cabling running from an antenna to each decoder point. At this point make sure you install whatever the latest MC recommended LNB is and make sure the cables are of the highest quality. Increasingly, cable length is becoming an issue. Already MC is suggesting that LNB cables must be kept below 20 m in length and in a situation where more than one decoder is involved, the cable lengths must be the same to each decoder between the LNB and the decoder itself for optimum performance.
There are also issues around which decoder should be set as the Primary decoder in an XV arrangement.
Older Explora installations using the Explora switch (especially the 5-1 switch) are becoming increasingly tricky to keep working. Even the first installations done with the first SLNB model LMX 500 are problematic.
Currently there are only two installation types that appear to be "future proof" which are:
A quad/quattro LNB combined with the 24-1Z switch or;
The new LMX501 SLNB with no switches involved.
A quad/Quattro LNB combined with the Explora 5-2 switch may also prove to be good enough for a while yet, but the older 5-1 switch is definitely going to be a problem.
Any installations using a standard SATCR/Unicable LNB are increasingly becoming a problem because the new decoders do not adhere strictly international standards as the user bands and frequencies need to be changed when running more than one decoder in an XV combination.
This is the price we all pay for technology advancements and upgrades. The new satellite makes use of Hi-band transponders. Already quite few customers should have noticed that they do not get all the channels they should get in HD, or are finding some channels have quality issues.