Brace each new triangle against the base of the adjacent triangle. Eventually, you should have three triangles (using six cards, total) that are all touching.
Be extremely careful. If you built the foundation well, it should be strong enough to hold up these new cards – but you will need to keep from knocking the whole thing over with a tremble or sudden movement. Stack the new cards lightly and cautiously. When you’ve finished laying the second “floor”, your tower should comprise thirteen cards: five triangles and three flat cards.
This is the basic four-card cell or “lock box”. It is one of the most structurally stable foundations that you can lay for your house of cards. Think of this cell as a pattern that you can repeat throughout your design.
Try adding “wings” to the house by attaching more T-shapes to the ground floor. Whenever you put down a card shape that is perpendicular to the table surface, make sure to lay a flat card layer on top as a “ceiling”. This will make the cards more structurally sound, and it will make the whole building look more like a house. Get creative. The sky’s the limit with this method – so see how big of a house you can build!
Make sure that there isn’t a draft! Build your house of cards indoors, away from open windows, doors, fans, and vents. You don’t want to lose all of your hard work to a ill-timed gust of wind.
Try placing cards when you are between breaths, or at the “bottom of your breath” – in the moment just after you exhale. Take deep breaths, and pay attention to the brief space that occurs between exhalation and inhalation. Your body is at its stillest during this moment, and you may find it easier to keep your hand steady. [6] X Research source
