Design

Why does BW Greenhouse use a Gothic Arch?

We use the Gothic Arch because it is stronger than a rounded roof and it is more appropriate for all weather conditions including extreme wind and snow loads. A gothic arch has a slightly pointed peak that goes down into rolled shoulders.

Even in climates where you don't think you need to deal with snow or need a greenhouse with a Gothic Arch, there are now instances where you do need them. Gothic Arches allow for proper strength against extreme weather at all times of the year.

Steel

Why does BW Greenhouse use Allied Gatorshield Steel?

At BW Greenhouse, we believe that Allied Gatorshield is the best steel on the market. It has the highest yield numbers at 50,000psi and has a superior coating to both hot-dipped galvanized steel and Galvalume.

It is a rust- and corrosion-resistant product that, when compared to competitors, has repeatedly come out on top. It also has a zinc interior coating that provides the inside of the tube with maximum corrosion and rust protection, so it is protected inside and out.

• It delivers to all end-users a smooth, shiny appearance.

• It can be easily fabricated…with no deformation or flaking of the base material.

• It can be produced in whatever length is needed to meet your specific requirements.

Foundation

Why do the greenhouse posts need to be set into concrete?

At BW Greenhouse, concrete posts need to be set in concrete because they are an integral part of the rigidity of your building and they protect against uplift and lateral loads

What are my options for posts set in concrete?

You have two options for setting posts in concrete. The first is drilled footings, that allow for wet setting the post while the concrete is curing. The second is flat-bottom brackets that BW Greenhouse will supply to anchor the posts, using Hilti anchors.

Read more about Allied Gatorshield Steel here

Engineering

Why does BW Greenhouse sell only engineerable buildings?

By selling engineered buildings only, we can provide comfort that our products have been designed and installed properly.

If you've ever had an insurance claim against a failed building, you're fully aware that the process can be prolonged over many years and you may lose time, all of the product that's in your greenhouse, and money. Also, relying on insurance is never the best option.

At BW Greenhouse, we put more into the engineering process to give you peace of mind that the product you own is well-made and reliable.

Coverings

What is polycarbonate?

Polycarbonate is a synthetic resin that can be easily worked, molded, and thermoformed.

What is polyethylene?

Polyethylene is the most common plastic. It is a tough, light, moldable, and flexible synthetic resin.

What is the difference between polycarbonate and polyethylene?

While both polycarbonate and polyethylene have their advantages and disadvantages, the product you use should be specific to your customized greenhouse.

Please view our Greenhouse Coverings page for information on selecting the product that will best suit your situation.

Why does BW Greenhouse not use glass as a coverings for a greenhouse?

Even though glass can rate high in transmissions, the advantages of diffusion are much greater than actual transmission. With glass, there are often breakage issues as well. The two companies we work with, Palram (polycarbonate) and Poly-Ag (polyethylene), are two of the world-class companies that have customized some of the formulations for BW Greenhouse and they supply us with a superior product to glass.

Ventilation

What is better for ventilation: roof vents, roll-up sides, or forced air ventilation?

Each ventilation option has its own advantages and disadvantages and should be chosen based on your customized greenhouse and situation.

By using roof vents, you will get good convection, but it is an expensive product and can be prone to wind damage. Roll-up sides are inexpensive and can be controlled automatically, but as soon as you roll up the sides, you will lose your humidity. There can also be some wind damage with roll-up sides, unless you install a boot.

With forced air ventilation, you can easily "set it and forget it" with thermostat control and it is very wind-resistant, but it is a more expensive product (as a side note, if you don't do your calculations correctly with forced air, your greenhouse can end up quite warm).

Heating

How much heating do I need?

To determine the amount of heating you need for your greenhouse, please refer to our calculators section for more information here

What kind of heating do I need?

There are a number of different heating options for your greenhouse, and choosing one is dependent on factors specific to your situation. Some options include: natural gas, biomass, propane, geothermal, solar hot water (Tigi Solar), underbench, and forced air heating..

Forced air heating is inexpensive and easy to use, underbench heating is good for propagation, but it is a localized heat which doesn't allow for heating of the whole greenhouse, and hot water heating is for larger, more commercial/industrial projects.

For further discussion on different types of heating available for your greenhouse, simply contact our Client Care Team and we will be glad to help!

Positioning

How do I position my greenhouse?

Generally in the Northern hemisphere, greenhouses are positioned north/south. With our BW Greenhouse high-diffusion coverings, that positioning becomes less of an issue because of the light conditions inside the greenhouse. As a side note, greenhouses should always be positioned outside of shadows.

Assembly

Please contact our Client Care Team if you have any questions regarding the assembly of your BW Greenhouse products.

Doors

Why is BW Greenhouse famous for their doors?

At BW Greenhouse, we pride ourselves on our doors for a number of reasons. Our sliding single panel or double panel doors are strong and versatile. They are pre-assembled, with heavy, aluminum extrusions and great rolling mechanisms. The door frames are made with our own aluminum extrusion which will hold poly, Dynaglas, or Thermaglas polycarbonate.