Tag Archives: greenhouse

Building Ends

One of the beauties of a Multi Shelter is the flexibility of the ends. By building the ends according to your needs your new building can and will truly prove useful.

It is important to remember that you need to be very careful when you have one end closed and the other end open.

When one end is closed you could potentially create a “parachute effect” (trapping air, creating lift) and put a lot of added stress on your building and especially the cover. Call us to discuss ways of minimizing this if your circumstance really would require one end open and one end closed.

When planning ends, it is important to have sufficient vertical framing to support wind load, doors, fans, etc. The spacing between the vertical framing will be determined by the amount of opening space required for the doors, etc.

It is important to remember that where ever possible, framing needs to go from top to bottom. In the event of large openings, the related framing will need to be doubled or tripled.

It is also important to remember that when you are covering your end with tarp, the top end of the cover is sandwiched between the wirelock channel and the hoop.

When you are covering with plastic, you will be fastening the top end inside the channel with the roof cover even if your roof is a double layer.

Please see the two pages in the installation guide for more information as well as photos: Ends & Door Options

Featured Add-On Roll Up Sides Q&A *Videos*

We made some tutorial videos regarding our roll up sides options. Please enjoy and let us know any comments you may have. You can also watch them all on our YouTube channel here: https://www.youtube.com/playlist?list=PLBUPJhbi2DLs0UYSo0FRwwi0pMo51PV80

As always, we are available for any questions that come up, so feel free to email multisheltersales@gmail.com or call our office 1-866-838-6729 Thanks!

You can also see more at our Roll Up Sidewall Considerations article (also below videos)

Ventilation can either be done passively through openings or mechanically with fans. Roll up sides are an economical way of getting lots of air movement since no electricity is required. Roll up sides become even more effective when used on longer buildings. Roll up sidewalls are often used in combination with a small exhaust fan for early and late season ventilation when opening the sides is not practical.

If a structure is very exposed, it is best not to open more then 3’ in height due to potential of wind damage. If a structure is extremely sheltered, it is best to go even up to 6’ to create maximum opening. Roll up sidewalls are most effective when used in combination with peak end wall vents to create a “chimney effect” to draw warm air out of the building, especially when it is very calm. These vents are effective for air movement when outside temperature does not allow opening of the sides.

When a structure has a low profile, you will need to be careful during rainy periods due to moisture getting into the structure area. High profile structures (with straighter walls) usually work better with roll up sidewalls. When preventing a floor draft is an issue, the roll up mechanism can be raised and then the structure is lined with a skirt for the bottom 2’-3’. When using this method of ventilation, it should always be done on both sides. An effective use of this method includes opening the “downwind side totally and the opposite side on marginally.

Building Ends

One of the beauties of a Multi Shelter is the flexibility of the ends. By building the ends according to your needs your new building can and will truly prove useful.

It is important to remember that you need to be very careful when you have one end closed and the other end open. When one end is closed you could potentially create a “parachute effect” (trapping air, creating lift) and put a lot of added stress on your building and especially the cover. Call us to discuss ways of minimizing this if your circumstance really would require one end open and one end closed.

When planning ends, it is important to have sufficient vertical framing to support wind load, doors, fans, etc. The spacing between the vertical framing will be determined by the amount of opening space required for the doors, etc. It is important to remember that where ever possible, framing needs to go from top to bottom. In the event of large openings, the related framing will need to be doubled or tripled.

It is also important to remember that when you are covering your end with tarp, the top end of the cover is sandwiched between the wirelock channel and the hoop. When you are covering with plastic, you will be fastening the top end inside the channel with the roof cover even if your roof is a double layer.

Please see the two pages in the installation guide for more information as well as photos: Ends & Door Options

Roll up Sides Q&A *revised*

We have had many questions recently about our roll up sides so we made some tutorial videos. Please enjoy and let us know any comments you may have. You can also watch them all on our YouTube channel here: https://www.youtube.com/playlist?list=PLBUPJhbi2DLs0UYSo0FRwwi0pMo51PV80

As always, we are available for any questions that come up, so feel free to email multisheltersales@gmail.com or call our office 1-866-838-6729 Thanks!

*edit* we apologize the links on the last post didn’t work, they have been fixed

Giving Back Greenhouse Opportunity

Multi Shelters values working with communities to help with charity and non-profit situations needing an extra boost of help, that we can give back whenever possible.

We have a wonderful opportunity coming up next week that we would like to share with you. Norm has been working closely with Johnny Theriault School and the community of Aroland First Nations, north of Thunder Bay. They are receiving a 20×48 Greenhouse for the school to use for teaching, and the community for fresh food. The community is quite excited for this opportunity and we are grateful to be part of the anticipation.

We would like to thank Breakfast Club of Canada for the opportunity of partnering with them to supply this greenhouse project. Norm will have to opportunity of meeting with the children and will be able to explain how this greenhouse will be used to produce some local fresh food.

We feel very grateful and fortunate to be involved with projects like this.

Greenhouses 101: Climate and Air Effects on your Structure

You might be wondering, How does air volume affect the climate in a greenhouse? There also is the matter of air changes. What is the connection between shape and aerodynamics? You need to make sure it stays put.

There are 3 forces on every building which need to be considered if you want it to stay where you put it and in the shape you built it. There is down force (usually from snow build up), up lift (by wind) and lateral shift (both wind and snow). Mother nature is not restricted by lack of patience and will work away at any vulnerabilities in the structure, often without notice until it’s too late. There must not be any wiggle room that the weather can work on these vulnerabilities or things will come loose, unstable, and wear out faster..

There simply is no such thing as too many anchors. There are also various tips we can give you for ensuring that the plastic is tight enough to avoid wrinkling and flapping about, while balancing the issues of it being too tight. This can easily extend the life of your roof cover.

We also advise, especially this time of year, to cover the structure as soon as you can as the more snow you have on that spot which has to melt, the more moisture you will have in the building. The more moisture you have in the building the more condensation issues you will have. You want to give that ground the most time possible to dry up before you need to start using the building.

Contact us for more tips and considerations for building a structure that will stay put and have a longer life, we would be happy to help you.

Check out the presentation video and the rest of the series Norm spoke on Greenhouses 101 here. Stay tuned for the end of  January 2016 when he presents Greenhouses 202!

Solar Power Fan Update

As many of you are aware, we have installed, and are testing an inflator fan which is run totally by solar power. We would like to eliminate or reduce the amount of variables and unknowns before we make this package available. One of the big questions has to do with how many days the little fan can run the way it is supposed to on consecutive cloudy days. During the aftermath of Hurricane Patricia we experienced numerous cloudy days in a row with the temperature just above freezing.

There is not enough margin for leeway in this package so we are checking out a smaller fan. If this works, then this would be the way to go for the smaller greenhouses. Our greenhouse has about 500 sq.ft. of double cover which is not all that big. This would also confirm that we need either need a bigger storage battery or a second solar panel.

Please stay tuned for more updates.

Center pivoting gable vent

We are pleased to introduce our center pivoting gable vent as a simple solution to the challenges of venting a building. For venting to be effective, it has to be as high as possible. This is a cost effective alternative to costly roof vents.

Part of the window swings in and part of it goes out. Because of this, rain is never an issue and the window is easy to control even in extreme winds. Incoming air is always deflected up to mix with the warmest air. The tubular steel construction makes it both lightweight and resist twisting over time.

A continuous rope goes from the top of the window to a pulley at the ridge, down to ground level and back up to another pulley and then to the bottom of the window. By tying the rope off to an eye bolt on a gable post, this allows for very simple control from ground level.

Vent4

vent3

Properly Venting a Building

Properly venting a building is a critical consideration when planning your building. Getting rid of the initial ground moisture, quickly, when you have erected your new shelter is something many people do not think of. Quality air changes for plants or animals is something that automatically comes to mind. Getting rid of moisture is equally as important for storing your valuables.

Since warm air holds moisture and warm air rises, it is important to have venting capacity as high as is possible. Venting through the roof, with individual turbines or a continuous roof vent, is the most effective but also the most costly. This is only really necessary when you are in a very protected spot and there is a real need to keep the temperature down in a long building.

Most medium length buildings that have the ends facing into the prevailing winds, can be adequately vented with gable end peak vents. Make sure that these openings are as big as possible and as high as possible. It is also important to make sure your “windows” can withstand the winds in your area.

As with all the other considerations, please do not hesitate to contact us with your specific set of circumstances and challenges

Getting Started….

We’ve added a new feature to our website that we hope will help some confusion when people ask, “but where do I start?” This new page gives a breakdown of steps to plan your structure, and helpful information links to short cut the website. We hope you find it helpful and we look forward to hearing from you!

Getting Started-Click Here!

We also have a steps for installing, that should be used in conjunction with our installation guide. If you haven’t seen it, be sure to click the links above to check it out!