Thirty some years ago, just after I first started building houses, a friend (another builder) and I took on a solar hot water franchise as a side line to home building. We thought solar heating was cool and avant-garde, and that everyone else would too.
Boy, were we wrong! We couldn’t give solar heating away. People thought that the solar collectors were ugly and no one wanted those ugly contraptions on their roofs. Besides, electricity and gas were cheap, plentiful and we would never run out of either.
My, how times and thinking about things change.
Here’s the scoop from the NAHB Research Center:
“Harnessing energy from the sun to heat water is nothing new. Solar water heaters have been commercially available since the 1800s. What’s new is how solar water heaters look these days.
Most modern solar water heaters mount flush with a home’s roof and resemble skylights. Solar water heaters are an environmentally sound way to reduce energy bills.

Solar energy can meet part or all of a home’s domestic hot water needs. Geographic location, system design, collector orientation, and collector size will determine how much energy can be provided for domestic hot water heating.
Solar water heaters come in a variety of configurations. Each differs in design, cost, performance, and level of complexity.
Most systems have back-up water heating such as electricity or gas. A solar water heating system usually consists of a hot water storage tank, a solar collector that absorbs solar energy, a back-up energy source, and (for forced circulation systems) a pump and controls.

There are two main types of systems: passive and forced circulation. Within each type, there are several configurations. A passive water heater consists of a water tank integrated into or located above a solar collector. In an integrated collector storage (ICS) system, also called batch water heater, the water is heated and stored inside the collector.
These systems are suitable only for warm climates where there is no risk of freezing. In a passive system where the storage is separate from the collector, as water in the collector warms, water flows by natural convection through the collector to the storage tank. A forced circulation system requires a pump to move water from the storage tank to the collector. Most solar water heaters in the United States are the forced circulation type.
There are several types of solar collectors. Most consist of a flat copper plate, painted black, that has water tubes attached to the absorber plate. As solar energy falls on the copper plate and is absorbed, the energy is transferred to water flowing in the tubes. The absorber plate is mounted in a casing that has a clear covering and insulation to protect the absorber plate from heat loss. Other collectors include an integrated collector and storage system and the evacuated tube collector.
Integral collector and storage systems combine the function of hot water storage and solar energy collection into one unit. Evacuated tube collectors produce higher temperature water and are more complex than flat plate collectors. Evacuated tube collectors consist of a series of tubes that contain a heat pipe to absorb solar energy and transfer it to a liquid medium. The tubes are evacuated (vacuum) so that there is very little heat loss from the tube.
Most solar collectors are roof-mounted. Solar water heaters are used for domestic hot water, pool heating and space heating needs.
There are a number of manufacturers of solar water heating systems. Manufacturers can provide information on local dealers and installers. The Solar Rating and Certification Corporation provides evaluations of solar collectors and solar hot water systems.
The evaluation includes an estimate of the performance of different systems based on the location where the system will be used.
Solar water heating systems may require periodic maintenance and have a relatively high initial cost. The payback period however is different depending on the cost of energy for heating water. In areas where electricity is used for water heating, the payback periods are shorter than for areas that use natural gas for water heating.
Care must be taken to guard against freezing of the collector and piping. Solar collectors may have installation limits some communities
An active, flat plate solar collector system will cost approximately $2,500 to $3,500installed and produce about 80 to 100 gallons of hot water per day. A passive system will cost about $1,000 to $2,000 installed but will have a lower capacity.
An experienced contractor should install solar water heating systems. Usually, a roof penetration is required
Solar water heaters save energy and use a renewable resource. By replacing electric energy or fossil fuel use for water heating, environmental carbon emissions associated with water heating are reduced or eliminated.
Stone interior floors are common in warm, humid climates due to the ease of maintenance. In colder climates, is a new technology to make stone floors is a viable alternative. Read on to find out what kind of stones to the soil – both inside and outside.
Types of stone used for flooring
Some popular choices stone floors are:
* Sandstone – is extremely durable, a good choice for medium traffic floors. For indoor use either matt, satin or matte. Sandstone tiles usually need to be sealed every 4-5 years.
* Lime – the quality of the stone varies. Soft-types can be used in low traffic areas. Hardest stones can be used in high traffic areas.
* Slate – the tough guys from the board on the deck floor outdoor and traffic of traditional media uses.
* Marble – normally this is a hard stone. So you can in the corridors, high traffic areas can be used. Also suitable for the bathroom floor.
*Granite – the hardest stone available, granite in high traffic areas and are used in the kitchen. Polished granite, exudes a feeling of fullness and splendor in a room.
* Terracotta – is a man of stone, which has properties similar to natural stone. The creation process is the compaction of clay and baked. This process in the form of terracotta tiles with properties similar to natural stone. The tiles have color variations, which are used for the aesthetics of the plant can be added. The surface may be smooth or rough. Patterns and textures can be created on the surface of the tiles.
* Terrazzo – another artificial stone, often used for flooring in high traffic areas and medium voltage equipment used.
The installation of a stone floor
In general, installing a stone floor is quite complicated and requires a skilled workforce. However, if you are not sure they are doing on your own, here are some links to the installation of a natural stone floor floor.Installing it is a matter of stress. The work is labor intensive and demanding. It requires training and special tools. Your dealer can help you hire a professional experienced its stone floor, to ensure your expectations.
There is no substitute for a good base, One of the first things that an engineer has to do is prepare the substrate. This is the surface on which the stone mortar joints can laid.Installers is directly on the concrete floor and sat on the tile. Wood surfaces, but usually a table of CBU or cement and donors need a supply of moisture, which seems barrier.Unlikely to move the support material. For example, water can penetrate into the mortar or freezing and thawing can reach the tiles, causing cracks or chips. To avoid this, some plumbers use a material called DITRA.
DITRA is the trade name of a layer to support easy movement as possible without damaging the stone floor.
Fixing the floor
Installation of measures in the area and snap lines for the design of chalk accurate. Some pieces are reduced to a special type of spacesuit. These are measured and cut-marked and reserved for the hand. The installer will use a diamond wet saw with a 10-inch-adaptation of the stone. Just cut the edges are smoothed by hand with a smooth stone. Once the design is determined, the thinset mortar, a cement based adhesive to the surface with a notched trowel or notched. Each stone or brick is pressed into bricks place.Stone is typically installed with narrow joints – that is, with little space between the tiles. If the area is too large tiles, plastic installers use washers or spacers for even spacing between tiles to maintain. In small areas that can not be used in its entirety.
Do not worry if your plumber called a little butter. This simply means that every piece of brick or stone with a little glue joint between the tiles substrate.Stone or bricks and mortar pieces already on the ground seldom exactly smeared on them, but when the installers move along as defined tiles or stones, he or she constantly checked to make sure everything is as flat as possible. To compensate for the variable thickness of the stone, the amount of glue applied mortar accordingly.
He put down and the thin layer mortar is cured completely, the installation program fills the spaces between tiles with cement. A sand mortar is used most frequently in natural systems. That fills the small joints with ease and will not scratch soft stones might.The mortar grout mixture is ground and spread over the tiled room with a tool called a float to fill all the joints. A sponge is used to clean the excess. However, it is in the mortar to cure, which can store up to 48 hours.