Yes, elevated houses may and will shake, especially during strong winds. Your pilings have been "sistered" to the older ones, allowing them to be extended deeper. Pilings only go down approximately 8 feet, and many of the older ones must be sistered to provide enough support once the sand has been washed away. This is why elevated houses tend to shift back and forth when exposed to wind gusts.
Elevated houses are prone to damage from high tides as well. The weight of water above the house can cause the foundation to deteriorate faster than if the house were not raised off the ground. Also, high tides can cause flooding inside the home, causing structural damage and raising insurance rates. Homes with basements often find relief from rising waters by going up in buildings. This allows more room between the house and the edge of the lake or ocean.
Houseboats are boats that are built specifically to live in. They are usually customized by buying a prefabricated boat and adding decking, pontoons, or other accessories as desired. Most houseboats are used as permanent residences and some even include land properties with them. However, they are still subject to the same dangers as any other floating structure out in the water. If you want to avoid these risks, don't use this option for your housing solution.
Onshore rentals are homes that are completely fixed to their sites, but they are still considered mobile homes because they lack a permanent foundation.
Homes built on stilts or pilings might experience damage even if they are not subjected to storm surge or floods. To be honest, much of the damage we witness to stilts or pilings is caused by frequent water exposure, but there are other factors. In our location, the two most common forms of stilts are pressure-treated wood and concrete. Both types of stilts are at risk for deterioration when exposed to heat and humidity from the sun and rain, respectively. The wood will turn brown and may even start to decay while the concrete will crack and split.
Stilts can also cause problems if their height causes them to interfere with utility services such as plumbing and electricity. Finally, people who live in stilt homes might be at risk for injury if they fail to take precautions against falling over the sides. For example, if a person living in a house built on legs fails to tighten all nuts and bolts before leaving home, then someone could walk off with the house when it's parked on its legs.
If you are thinking about building a stilt home, here are some things to consider: Make sure the length of your stilts is greater than their width. This will help prevent stress on any one leg. If you want to be extra careful, put a layer of insulation between the floor and bottom of the stilts. This will reduce heat transfer through the ground and protect it from moisture. Be sure that you use waterproof glue on any joints where the stilts connect to each other or to the main structure.
It's natural for a home to sway in the wind. The higher the house, the more it will sway. It would break instead if it didn't flex. Much of how much it moves is determined by whether section of the home confronts the wind, building techniques, and construction quality.
The maximum amount of movement any structure should be expected to sustain without damage depends on its design strength. A house designed to stand against strong winds shouldn't be expected to remain completely still even during a storm. Rather, it should be able to withstand the force of the wind without being damaged.
However, even well-designed houses can suffer damage from wind if it hits them head-on. Strong winds can blow over or through a house causing it to be knocked off its foundation or destroyed.
When a high-speed wind blows past a house, it creates a vortex that draws in air from all directions. This moving air has extra energy which it transfers to the house. If the house isn't strong enough to resist this force, then it will collapse under the weight of its own siding and roofing materials.
Wind can be responsible for other damage as well. It can lift large objects like trees into the air, tear them apart, and scatter their pieces across open fields.