Building walls in the project

Hi, I tried to build walls but I can’t. Can someone help me? Thank you

Upload your .skp file so we can see what you’ve got going on.

You don’t give us much to go on. The joker in me wants to say first buy some bricks and some mortar, but I’m guessing that’s not the kind of advice you were after.

Here’s a standard method for walls to create a rectangular room: start with a rectangle with length and width the size of the room you want. Select the surface you created and use the Offset tool to create a larger outline of your room with a width appropriate to your wall thickness. Then delete the “floor” surface of the room, leaving two rectangles enclosing a surface. Now use the Push/Pull tool to draw the walls up to the height you want. After that, you can start punching holes in it for windows and doors if you want.