What is Keder?
Perhaps you have heard of PolyKeder™ or you have read about keder, however you are just not so sure what the stuff is!
Keder is the name of a type of beading or cord that manufacturers place along the edge of thin sheeting of a material, allowing for it to be attached to a structure. In many cases keder is used to attach vinyl signs to rigid structures facilitating a secure attachment.
The German manufacturer of Polydress® LPKeder, RKW SE, has implemented this concept into a greenhouse film designed for the purposes of providing a way to attach and secure the covering to a greenhouse frame. By attaching a keder bead to a greenhouse film, many advantages unfold to the greenhouse owner.
RKW created their keder bead out of a very durable polyethylene which allows an easy heat weld to occur to the plastic sheeting, which is a Multi layer bubble sandwich also made of high quality polyethylene. The keder bead is welded to both sides of a roll of polyethylene and the resulting product is referred to as Polydress® LPKeder aka SolaWrap™ .
The rolls of Polydress® LPKeder aka SolaWrap™ greenhouse plastic come in widths of 4 ft., 5 ft., 6 ft., and 2 meters. These widths are specifically designed to the support normal bow spacing that occurs in commercial greenhouses, as well as, backyard greenhouses and hoop style greenhouses.
The keder bead, is secured to both sides of a roll of polyethylene bubble film, that allows for easy assembly. The keder bead is then guided through a profile connector piece, referred to as high impact PVC extrusion. This piece of specially engineered plastic is like a tracking system that securely locks the polyethylene plastic covering into place, enabling continuous connection of the greenhouse plastic while connecting it to each of the bows of a greenhouse.
This ingenious system creates an airtight, watertight attachment of the plastic covering to the roof of a greenhouse. Unlike the placement of normal 6-mil polyethylene that stretches across the whole greenhouse structure causing uneven weight bearing of the end walls, SolaWarp evenly distributes wind load and snow load across each bow of the greenhouse. This system allows precious plants to be protected from the elements and will require less greenhouse maintenance for years to come.
So, in other words, you will spend less money and less time replacing your greenhouse covering, which is a common requirement for greenhouse structures, commercial, backyard or hobby greenhouses. An additional benefit here is environmentally, as greenhouse fill does not break down so there is less greenhouse plastic to dispose of.
There have been reported cases of winds in excess to 130 mph that ripped off the 6 mil double blown covering enclosing greenhouses, cracked or removed polycarbonate panels. However, the greenhouses covered in SolaWrap™ remained unscathed. The honeycomb design creates superior strength in the face of dynamic forces such as wind and hail. Attach a keder bead and it is nearly impossible to rip panels of SolaWrap off of a greenhouse structure.
Purchasing a geodesic dome greenhouse kit encompassed with SolaWrap™ plastic covering will ensure that you will have protection from harsh weather conditions for generations to come. For more information contact us at 1-781-816-7811 or firstname.lastname@example.org
Growing Potatoes in a Greenhouse can provide you with amazing results. In New Hampshire, we grew redsen potatoes, and a few yellow potatoes, in an unheated greenhouse covered in Polydress(R)SolaWrap greenhouse film. The potatoes grew in soil grow beds, however we also have aquaponic grow beds in our greenhouse, as well. We planted during a blizzard at the end of February. The plants started off rather slowly, but quickly grew as the days got longer. We watered them regularly, making sure they got at least an inch of water per week. The grow beds also drain really well, so the tubers were never able to stay wet for too long, keeping them from rotting. The foliage looked so healthy and the plants grew so straight that one visitor remarked that they looked fake. Then the foliage started to weigh the plants down, and they fell over one by one. By May, they were ready for harvest. We held off a little, hoping that they would grow just a little bigger. When we discovered aphids on the leaves, we knew it was time to harvest. We cut the stalks and shook off the aphids over the fish tank. The fish went wild! They loved the sweet treat. Aphids have a melon-like flavor, making them very appealing to both predatory insects and fish. In an aquaponic system, feeding fish a natural diet can greatly enhance the flavor and nutrient level of the growing food. We left the potatoes in the ground for two more days, allowing them to dry slightly before we harvested. My toddler, preschooler, and I began to dig and pull the tubers out of the raised beds. After we harvested 21 pounds of potatoes in our greenhouse, we were wiped out! So we sent daddy out to dig the rest. When the rest of the potatoes had been harvested, we had almost 60 lbs of potatoes from a 30 square foot area of raised bed space. The potatoes varied in size. Some were small “soup potatoes” that I don’t even have to cut up to put in stew. Some are the size of softballs. We allowed the potatoes to dry on our counter for a day, then we layered them with paper towels in a cardboard box. We store them in our basement, which maintains a temperature between 40° and 60°. Consulting different sources can give you vastly varying temperature ranges for the ideal potato storage. Some say between 30° and 40°, others between 50° and 60°. So we figure we are safe with between 40° and 60°, considering that the alternative is to have one giant party with the motherload of potato salad. We are growing another round of potatoes in a different part of the grow bed in the summer. We are using diatomaceous earth proactively on the leaves and dirt surrounding them. Last year, in the outside garden, we dealt with colorado potato beetles. We are hoping to avoid the same […]
Greenhouse Plastic Options for greenhouse covering materials are increasing. You can find cheap 4 or 6 mil at your local home improvement store. This will last for one season to up to four years. 4 or 6 mil plastic is polyethylene with high light transmission and low light diffusion. It can be doubled up to increase the low insulation levels, however you must blow air through the two layers to get a higher insulation value. Polycarbonate comes in many different forms. You can find single layer, twin-wall, up to 5 wall polycarbonate. All these options use channels to hold air, required for insulating the greenhouse. These channels must be sealed to get the most insulation out of your polycarbonate. You also will need to choose between high light transmission, and high light diffusion. A clear polycarbonate will give you high transmission, but low diffusion. A glazed polycarbonate will give you high diffusion with low transmission. Both diffusion and transmission of sunlight are important for successful plant quality and yield . Light transmission shows how much light gets into the greenhouse. Light diffusion is the soft light that plants love and thrive under. If you deprive your plants of one or the other, they will suffer in some way. SolaWrap utilizes bubbles in thick polyethylene plastic to both transmit high amounts of light, and diffuse high amounts of light. The bubbles bend the light in all different directions so no glaze is needed to diffuse as well as block light. The result is astounding. The amount of light your plants receive helps them to grow quickly, while the diffused light hits all surfaces of the plant, allowing it to develop fruit faster. Growers in the Mediterranean have reported a three week advancement in their tomato crop, as compared to tomato plants grown in greenhouses covered in other kinds of greenhouse plastic. Not all plastics are created equal. SolaWrap is made in Germany. It was invented with through quality German engineering. Germans are known for their skills and production of high quality products. SolaWrap is available in the US now after 30 years of exclusivity in Europe. The process of blowing the bubbles into SolaWrap and welding a strong keder cord onto the sides of the material is proprietary and nearly impossible to replicate. SolaWrap comes in four different widths, 4’, 5’, 6’, and 2 meter. These widths accommodate different bow spacing on greenhouses. SolaWrap comes 100 meters long, or 328 feet. Instead of panels or large sheets, these strips of greenhouse plastic allow for easy installation. Not only is it easy, but it is safe too. For those needing to re-cover greenhouses, SolaWrap offers the quickest and safest installation available. We offer a new paradigm in greenhouse plastic. Get all the benefits, with no compromises. Protect your crops from harsh weather conditions and enjoy the benefits of growing year round with less energy. Join our webinars to learn more. Email us if you have questions. Share […]
If you have wanted to build a greenhouse in your back yard and have researched geodesic greenhouse domes, a website might appear that offers a book entitled “Eden Bio Dome Revolution”. This is an E-Book that provides information about building a greenhouse structure in a Geodesic dome design. In it the author expresses his concern about our food supply where, he indicates that the quality of commercially grown food has become questionable. Raising children on our own, and believing along the same lines as the author, we decided to build a greenhouse dome in our back yard. Initially after purchasing the eBook we were overwhelmed and like many others quite confused. However, just like so many others who purchased Bio Dome Revolution, we got excited about the thought of growing our food in a dome. Then went on a wild goose chase searching for the for a special greenhouse covering mentioned in the book that the author, Kacper, claims is the best greenhouse covering in the world, to cover a geodesic bio dome that his book tries to teache how to build. He calls this special material Poly Keder. He then provides the contact information of a Canadian couple that sells poly keder out of their barn in Manitoba, Canada. I’m sure that everyone that reads this book tries to contact the Canadian family with hopes to get their hands on Poly keder. We personally know the Haines family has received over 1500 phone calls in 2011. I am sure everyone reacts the same way when they are told that it costs $3000 for 2100 square feet of the greenhouse plastic, poly keder. The readers, just like us, realize that the information is a bit unclear, based on the fact the book states that one could build a bio dome for about $500. Then they hang up and try to catch their breath. With time they realize if they spent all the effort to build a geodesic greenhouse then it would make sense to invest the best greenhouse covering that will last longer and allow for a reduction of heating costs for year round growing. When we did the math and understand the concept of replacing a greenhouse skin every few years, we called the Haines back ready to order a roll of the poly Keder. When we got the shipping quote of $800 + and realized that the cost is way too much to pay. Then we went back to the web and continued our search for Poly Keder and found a company called “Made In America” that specializes in “keder” solutions. Quickly we realized that “Made In America” does not carry Poly Keder greenhouse plastic that we could use for covering our geodesic dome. What they carry is keder beading which is actually the edging piece attached to vinyl signs, providing an easier way to affix a vinyl sign to a structure. Frustrated, we continued to search. We then came across PolyKeder.com. We got our hopes up; […]
Polydress SolaWrap Reported to Last Decades Without Yellowing or Cracking SolaWrap Poly keder greenhouse covering has proven its success with the greenhouse industry through out Europe for three decades and is now being introduced to the United States. SolaWrap has many unique qualities. Growers in the Mediterranean have reported tomato crop advancement of three weeks, during the winter months in an unheated greenhouse when compared to standard greenhouse coverings. Its durability and longevity was tested in the extreme heat of Kuwait for a period of 25 years until the outbreak of war destroyed the testing facility. In that 25-year period, the original SolaWrap covering withstood the elements and remained effective. It did not yellow or become brittle or streak. In New Hampshire, a converse climate where they received above average snow falls this year; a snow load test was performed. 4000 lbs of an 11 ft high pile of snow was placed on top of a 6×6 piece of SolaWrap attached to a frame using the specially engineered interlocking system. No damage was sustained to either the greenhouse plastic or the interlocking system that secured it to the frame. In Manitoba, Canada, where temperatures drop well below freezing, a trial has been in process for more than five years. The results are very promising. Strawberries are growing in this SolaWrap greenhouse in January, and the only heating occurs at night during the dead of winter. Another testament to test of durability would be the greenhouses that currently have the original covering still in working condition after 29 years of severe weather, including winds in excess of 100 mph, hail storms, and heavy snow blown blizzards. In Alaska, while 130mph hurricane force winds where uprooting trees, destroying homes and neighbors standard greenhouses, the Geodesic Dome greenhouse covered with SolaWrap remained damage free. SolaWrap comprises three layers of polyethylene film that encloses thousands of air bubbles. These air bubbles give SolaWrap a remarkable R-Value of 1.7. They also allow 83% transparency of sunlight while diffusing 83% of the light. This truly is a paradigm shift for the greenhouse industry. Not until now could Americans have the benefits of high light transparency together with high light diffusion in the same greenhouse covering material. With the increased amount of light diffusion plants grow healthier and faster. Normally, in the summer, thousands of dollars are spent on shade cloths, however, in Europe, due to the high diffusion rates; only 10 percent of SolaWrap greenhouses utilize shade cloths. The flexible nature of SolaWrap allows growers benefit from this highly insulating material year round, where they will require minimal heating from additional sources. SolaWrap can be easily attached to drop down curtain and roll up curtain mechanisms, which allows for great sidewall ventilation. Also, high tunnel or hoop house growers finally have a long term, highly insulated, solution to cover bowed greenhouses. Because of the long term proven durability there is no more changing their covering every few years! Imagine how this will increase profits over the […]
RKW SE located in Michelstadt Germany owns the technology of the most innovative greenhouse covering in the world. Polydress® LP Keder commonly known as “polykeder” or “keder” has been in use for 30 years in Europe, but has been hidden from the US for all that time. Keder has growers in the Mediterranean boasting a three-week crop advancement of tomatoes, in the wintertime, in an unheated greenhouse compared to all the other alternatives. Keder has everything that a commercial grower, or back yard grower would ever want in a greenhouse film. First, it boasts an R-Value of 1.7 without the aid of inflation systems. 1.7 is higher than double blown poly systems and twin wall polycarbonate. This special film incorporates natures honey comb design to trap air in bubbles that create a dead air space within the film. Keder is comprised of three layers of polyethylene. However, interesting enough each layer of this film is made up of three layers that are scientifically fused into one. So in reality it is nine layers of film! Heat has a very hard time escaping this special material. The money saved in heating cost alone make this a very sought after material. Second, it shatters the greenhouse film paradigm of having to choose either a transparent film for high levels of light intake or choosing a glazed material for high levels of light diffusion. Keder is 83% transparent BUT creates 83% diffused light! In other words this product allows high levels of the type of light that plants grow under. No other greenhouse film can offer this. Third, it is very strong and durable. There are greenhouses in Europe that have original keder on their greenhouses after 30 years! This German engineered film doesn’t yellow, streak, fog, or get brittle with time. It also withstands natures forces. Gale force winds, high snow loads and hail storms dont have an impact on this covering. This provides a feeling of security to the growers whose livelihood depends on the safety of their crops. Finally, it is flexible so it can be implemented in roll up curtain systems. This allows for extreme ventilation in the summer time. Every grower understands the need to ventilate the heat of a greenhouse in the summer. Keder allows for that in such an easy way. Polydress® LP Keder truly is the best kept secret in the greenhouse industry. Once it is known in the US our growers will reap the rewards of the special qualities of this German engineered film. Commercial and backyard greenhouse owners a alike , who cover their structures with Solawrap will experience the best the industry has to offer. Do not take our word for it. Call to request a sample 1-781-816-7811. Join our community and our bi-weekly webinars to ask questions about building greenhouse dome kits, harvesting a healthier lifestyle or growing the most delicious food while providing security for your family. You can email us too, at email@example.com […]
When Clint set out to test the durability of Polydress®SolaWrap Poly Keder, he was more than surprised at his results. Solawrap is a greenhouse plastic that Clint uses in his greenhouse kits. After studying all the facts about Solawrap against other greenhouse covering materials, he knew the plastic film was strong, however neither he nor the manufacturers realized that the poly film could hold 4000 lbs of heavy wet snow. So, ask yourself, if you were to build a greenhouse and lived in an area where snow was an issue, would you want to feel confident that you had the best greenhouse covering your plants? Solawrap has also proven to withstand hurricane force winds of 130 mph with out damage as well. Before you invest in a plastic covering for your greenhouse, ask the right questions. If you have questions be sure to join in our weekly webinars or email or call us.
How can Poly keder Solawrap increase profits for CSA Farmers? If you are seeking to grow for your community through providing a year-round CSA, you have probably found that there are many obstacles to overcome. How do you grow year-round, especially in the northern states? If you invest in a greenhouse, how do you get the most out of your investment? How long before you see a return on your investment, and how long will that investment last? If you are in a northern state, you have to think about more things than the southerners do, such as sunlight hours, sunny days vs. cloudy days, temperature lows, humidity levels, and orientation. If your location gets fewer than 6 hours of sunlight in a winter day, you will have to have grow lights. The locations that must deal with this are mostly in Alaska and Canada. If you have more cloudy days than sunny days, you may also want to think about grow lights, just to ensure that your plants will grow throughout the winter months. Your best bet is to invest in high quality materials for your greenhouse. High quality materials will help you grow year-round because they have the properties that maximize sunlight and minimize temperature fluctuations. Polydress® SolaWrap poly Keder is perfect for year-round growing because it resists temperature fluctuations better than any other greenhouse covering material. In Europe, they call this “Thermal Resistivity.” Thermal resistivity means that the material does not transfer heat, better still; it resists transferring heat, to a certain degree. Polydress® SolaWrap’s thermal resistive qualities equal 27! Seeing that each countries measurement standards differ, rough estimations indicate that TR is 3-5 times greater than that of other materials. You will want to maximize growing space by building as large of a greenhouse as your budget and property allows, while using as little material as possible. You can build hoop style tunnels with poles, brackets, a small amount of wood along with SolaWrap poly keder greenhouse film and S-Lock interlocking system. If you use larger gauge poles, your investment will be stronger and last much longer. If you then raise your growing area with low-cost sandbags or cement blocks, you will be able to grow even more plants. Raising your grow beds above the frost level keeps your soil warmer and less susceptible to temperature fluctuations from the outside. SolaWrap keeps the inside of your hoop house much warmer than other greenhouse coverings do. In Milwaukee, WI, urban farmer, Mr. Will Allen, has reported that his SolaWrap hoop house is ten degrees warmer in the winter mornings than his other hoop houses. Just imagine how much you can grow with that kind of temperature security. You will see your ROI quicker if you can grow and sell more produce. With a high quality SolaWrap hoop house, you know your investment will last for a long time. SolaWrap poly keder has been proven to last up to 30 years in Europe. The stronger your poles, or hoops, the […]
What benefits does poly Keder provide for greenhouse owners? The strength of the Keder bead on a hoop house or similar greenhouse house designs covered with Polydress®SolaWrap is unmatched. When this uniquely engineered poly film is attached to the greenhouse frame with S-Lock, a patented channel locking system, the SolaWrap greenhouse covering can withstand 100+ mph winds. This truly is a system built to withstand the elements. It is more likely that a hoop house would collapse than the SolaWrap on it would rip. Through a proprietary process, RKW, the manufacturer of Polydress® SolaWrap, welds a strong cord of polyethylene to the edge of the bubble film. The SolaWrap itself is comprised of three layers of polyethylene film with air blown into pockets for insulation and light diffusion. The resulting product gets stronger as it is pulled tighter. The bubbles’ honeycomb design proves to strengthen the overall effect when stretched. This product has only been released here in the United States in the last year. We like to think of it as Europe’s best-kept secret, because no one had heard of it here before. Many ask, “If it’s so great, why isn’t it popular in America?” Great question! Lack of Marketing! RKW is a family-run, multibillion-dollar company in Europe. Because they are family-run, they make decisions like a family would. They gave exclusivity for Polydress® SolaWrap to a greenhouse manufacturer in Europe. He was very loyal to them, and in turn, they are very loyal to him. Germans are incredible at engineering, however not as interested in marketing. When JC Brighton, sister company to Harvest Pathway, found the product, we were astounded. Since no one else had rights to sell it in the US, we asked if we could. RKW extended us the same opportunity, and we were able to bring it to the States. So now Polydress® SolaWrap has come to our US shores. If America is ready for the greatest innovation in growing, we are ready to bring it to her. SolaWrap combines high transparency with high diffusion. This combination cannot be found in any other product on the market. You can get high transparency with a poly film, or high diffusion with a polycarbonate, but not above 80% with both (as you can with SolaWrap). SolaWrap also insulates better than twin-wall polycarbonate and has been proven to last up to 30 years. It’s also easily installed on a hoop house or greenhouse, just cut with a knife or scissors, no saws required. Why is this all s important for the greenhouse growers? There are many reasons 1. Longer lasting material will put money back into the pockets of greenhouse growers due to a reduction in replacement requirements. 2. Plants significantly benefit from Higher diffusion and higher transparency with increased crop quality and production 3. SolaWrap’s high insulation values increase the growing seasons providing a more plentiful harvest for commercial greenhouses and backyard growers as well. Call today 1-781-816-7811 or […]