hi, I decided to build a playhouse for the kids and thought it would be a nice idea to put a cedar shingle roof on. I fixed the batons and nailed the shingles, leaving a 200mm overlap. All seemed to be going well until I finished one side and went inside to inspect. If I stand at a certain angle / height I can see the sky through small gaps which I can't see from the outside. I'm hoping that this isn't a major problem and that as the rain runs down it won't penetrate the gaps but I fear I'm being over optimistic. Can someone allay my fears or suggest a fix without ripping the whole lot off which I'm very reluctant to do because I think they would split. Can anyone help?!