While waiting for the next winter builder repeatable, I have some time on my hands and just start posting what we helpers had to post so many times again and again during the last builder events.
There is general information about the winter builder event here
https://forum.pixelfederation.com/diggysadventure/d/192837-winter-builder-4-igloo-under-construction
However, neither there nor in the informations in the game itself is it made crystal clear, that for the unlocking of the igloo floors it is NOT enough to have collected the keys! It can’t be achieved by a player by himself/herself.
Edit: By now, there is a much more detailed info thread by pixel here
https://forum.pixelfederation.com/diggysadventure/d/192859-builder-event-all-you-need-to-know
End edit.
It says: „Collect the keys to unlock the floors“ and „All players from a region work together“.
What this means is:
While playing, you collect the ice and exchange it for coins.
The coins are for you to buy equipment or jewels or rings with them.
The ice is for building the igloo.
But you don’t build an igloo on your own.
All players of your region (Egypt, Scandinavia, China, Atlantis, Greece, New World, Terra) build your region-igloo together.
When all players from your region have accumulated 100% of the ice that is needed for the igloo, you are able to reach the topmost floor.
The building process is divided in 8 equal steps.
So the first floor is finished at 12,5 %, then you can enter it, if you have the key.
Second floor is finished at 25%.
Third floor at 37,5%
Fourth floor at 50%
Fifth floor at 62,5%
Sixth floor at 75%
Seventh floor at 87,5%
Eighth and last floor at 100%. There you will find the Platinum ticket for the best equipment.
So you collect ice, exchange it for coins and collect the keys to the floors in the process.
You check the region progress and wait for the next milestone to be achieved, so you can enter the next floor.
Other regions may be faster or slower, but in the end, each region will complete the igloo.
It has always worked, don’t worry.
Edit: This is how far you can get on your own:

And this shows you the progress of the regions:

Terra is on top and has unlocked the first floor already. New World is close to unlocking the first floor. As I‘m in Atlantis, I still have to wait, we Atlanteans only finished 7,2% so far…
And as I‘m so modest, I cut away on the left, where it says that for now I‘m in the top 10% of the contributers of my region 😉😄 This medal gives you nothing or virtual honor, whatever you like best. Same goes for the rank of the region.
Next edit:
You can also check the progress in the overview. Now my region has finished 16 % of the total igloo.
That means that I can visit and clear the first floor.
You see that I have achieved all 8 keys, but as long as the second floor is not built yet, the keys for second to eighth floor are of no use. If you still visit the igloo, there is a person blocking the way upwards. It says, the monument is under construction, so not ready to enter yet.
First the whole region has to build a floor - including a keyhole 😄, then you can enter, if you have the key.
