I hope this explains them:
The roof has four, two on each side, a plain one is glued between the one with notches that go inside the holes in the loft (see below). (See black arrows.)
If you have more questions let me know.
BUY IT NOW!(If you would like another color then listed please contact me for a list of current color selections.)
(Disclaimer: Due to the way Paypal sets up shipping, all charges are "flat rate" I try to ship the cheapest method, if there is an over charge of more then $1 I'll refund the difference. If for some reason shipping ends up being more then $1 difference, I'll contact you and offer a full refund or you can pay the shipping costs, your choice. If I cannot ship to your country easily I'll give you a full refund. If you would like a shipping quote for this item please contact me.)
We can also post these on Ebay, Etsy or Zibbet, if there is not a current posting, let me know and we will post one for you!