Are the nails you're talking about flooring nails?

SPOT ON!Are the nails you're talking about flooring nails?
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screws would rip the wood apart tho... not a wood guy but even to me feels and seems flimsy at baseline..I dunno...I'm not sure those are the right fastener for the application...I'd be tempted to get some stainless steel screws.
Here is one where I tried to use screw instead of nail.Can you show a pic of one of these nails where you think a screw would rip the wood apart?
Is that cupola flashed right? What about attic venting? Which side is your vapor barrier on?
Just kidding! Cool playhouse, will be nice after a good wash. Not so sure about the Liquid Nails, looks like the siding is maybe sandwiched so should move and rack with the whole house. I would think at least the main skeleton would be screwed together and countersunk or with plastic caps.
Will defer to the paint guys.
Gotcha, but does it matter that these are the "nails" that came with the house? Also they are all inside of the structure, under the roof and so not directly exposed to elements or sun.You should not have used square flooring nails to hold structure together. Now you need to use either stainless ring shank nails, or stainless screws. I would go with the screws. They offer better hold and strength. No glue. Use the correct fastener for the job. If you want to hold wood together with glue, use wood glue. After you clean and sand the two surfaces. But still use the correct size nail or screws. And always stainless steel for anything to be stored outside.
We make buildings and sheds for children just like you have shown. We also make raised planters and raised garden containers. Plus many more items from wood. I always use cedar and stainless steel screws or nails. I still have one of the first that I created when I was a teenager in the 70's. All because of the wood, fasteners and the paint.
Best way I can describe them is they were small square nails, bout 1/2" in length, if that. Did some googling and I guess they could look like like either the flooring nails or per Google, cut nails.It does not matter. Why would it? If that is what came with the kit, they sent you what they had. Are you sure they are not 6 or 8 penny nails? It does not matter the type. I just cannot understand the use of square iron nails for an outdoor item. You can really use any type of nail or screw as long as it is protected from the weather. I use stainless when and where I can since this is a product we are selling. We want it to last as long as it can.
Paint or stain, just protect the wood. That is when failures occur. When bare wood that is not designed to be outside unprotected. I would probably paint it with a good oil based paint. Much better and longer wear than stain.