FIRSTLY, This IS Insufficent Atting to the Structure of the Base -it Must Be Prepared and Leeled in Such As to Comply with the Established. Secondly, Very Offten Novice Masters Do Not Withstand the Technological Seam Along the Walls. And, Thirdly, It Offten Happens that When Laying the Locks of Panels Are not Connected Tight Enure. You can avoid these errors, Fullly Following the Instructions of the Instachedi the.