Porous or non-porous surfaces are often referred to as “non-porous surfaces” (PNPS). The term is sometimes used to describe materials that do not have a protective coating.
A porous material such as concrete or a porous material such as fiberglass has pores. These pores allow the liquid to travel through them. Water can enter porous concrete if there is an opening. There is more room for water to leak in from the ground than from the attic or gutter in a fiberglass roof. The solution is to use a porous or non-porous material to cover the roof’s top and bottom to prevent water penetration.
Another type of non-porous material that has pores is tile. Tile can be an effective barrier against rainwater but may have gaps, cracks, and openings allowing rainwater to penetrate the wall, ceiling, and floor.
Another porous material is plastic. Plastic is non-porous but does not have pores and will allow some amount of water to leak through.
Porcelain is also porous and can allow some amount of water to penetrate. But, water will usually pool on the surface, and the material itself will crack, break, or peel.
Passive Solar Energy
There are many other types of non-porous surfaces. These include marble, granite, wood, and tile.
There are a variety of ways to use porous materials to block rainwater from entering. The most common way is to use a waterproof liner under the subfloor to protect it from moisture. If you have a patio or deck, adding a waterproof membrane to that area would also work.
By using porous materials such as tile, vinyl, and plastic, your home can absorb some or all of the solar energy being produced. When that energy is harnessed, the resulting energy can be turned into electric or hot water to power any appliance.
Another option for a PV solar water heater is to have the tank connected directly to your water line to collect all of the solar heat in the tank. The water would be heated to a temperature above the average temperature in your yard or to a temperature that will not damage the pipes.
Once this heat is collected, the water can then be run through a pump to turn a turbine into hot water. This hot water will provide you with hot water for your home.
A Much Ado
Another option for a PV system is to use porous materials that allow some amount of water to leak through. If the leak is small enough, it will not damage the pipes. And you can use that leak to run a heater or a pump.
Some people do not like the idea of porous materials because they do not want to have water leaking into their homes. Other options allow the water to leak out of the porous material and down the drainage pipes if that is the case.
For example, if you have a vinyl roof, there is an option to attach an absorbing film to it that will absorb the water and prevent it from leaking into your home. If this is not practical, you may be able to have some of the water leaks into the space below the subfloor.
Some people choose not to install porous materials in their homes because they are concerned about the smell, color, and taste of the absorption film. With these materials, the water is absorbed by the coating, and water evaporates and is wasted.
A third option is just to install a PVC pipeline that collects solar energy and sends it into your home. The problem with this solution is that there are some parts of your home where there are less shade and more sun than there is in the rest of your home.
This can mean that you may need to install reflective insulation in areas where you plan to place porous materials. If you plan on putting reflective insulation on the walls, make sure that the reflective insulator is able to block the UV rays from the sun.
The only way porous materials will absorb enough water to generate hot water is if the solar heat is stored inside the tank. The stored energy is then sent to a pump that turns it into hot water. If you are using a PVC pipe, you will have to ensure that the pipe is not blocked, or you will run the risk of the water leaking into the pipes and making the plumbing repair cost.