Wet shed help please

charlievalentine_2

Hello. Just had a new shed/playhouse put up. 6 x 4 with 2 foot front veranda. Tongue and groove with apex roof. Lots of rain this week and the walls and floor are getting wet. I cannot see any visible gaps and have painted with shed paint. So I guess I need to seal it somehow. Do I use caulk, silicone or something else? Also, do you do this on every join inside and out? Really want this ready for my boy to play in for his birthday next month. Any advice appreciated. Thank you!

anotherbaldrick

Shed should be watertight without having to resource to additional sealing ! Have a good look at the felting of the roof first, any obvious unsealed seams or laps where rain can get blown under . The mastering of the corners and joints .