I am planning some decking for the garden (bit late in the season I know). Doing some reading on the subject and the deck needs to be secured to the wall of the house. I presume this is to secure it so its not floating and waiting for a gust of wind to take it away! However, I got external insulation on my house. I presume I should avoid nailing the decking to the external wall of the house as the external insulation would not support the decking. Was thinking then of secruing the decking to the side wall of the house instead. What do you think of this? As you can probably tell from this question, I'm a bit of a novice with these types of projects so maybe another question is: Is decking an easy beginner project?