How long will assembly take?  Is hiring a carpenter required?
We provide illustrated, clear and easy step-by-step  instructions.  Most kits are easily assembled in one to two days.  Prefabricated parts easily screw together (hardware included)  Precision precut glazing easily slides into place.
No cutting is required.  Our kits are designed for do-it-yourself home owner projects.  Hiring a carpenter is not required.  We offer 7 day telephone support.
What type of foundation should I prepare?   Please click on this link to view the foundations page.

Can I provide my own masonry/stone basewalls ?  Yes, occasionally clients want to use masonry or stone  rather than our t/g basewalls.   We will provide you with the drawings for building your own 30" or 18" basewalls, or we can provide the 2x4 framing for your veneer.  Our sloped window sill will anchor on to this.   

How is my greenhouse shipped?  
Your greenhouse is securely crated into plywood  crates manageable by two men.  It is fully insured during shipment and delivery. Shipping rates are very reasonable anywhere in the country as we have a 68% freight discount with our carrier. We will provide you with a tracking number to follow your shipment on-line.   You will be contacted by the freight company for delivery.  You will be required to offer assistance in unloading the crates so it will be best to have a few guys present to assist.   
We are located 5 mins north of the WA state border and our shipments go straight across daily to the USA.  We take care of all of the paperwork.  
Why are your custom built doors an important part of your greenhouses?
We manufacture our custom designed Western Red Cedar doors.. They are composed of the same Select cedar that we choose for our greenhouses.
Many of our competitors buy lumber yard "premade"  Fir doors. Unlike Fir, Cedar does not decay or warp in the humid environment of greenhouses.  As well, our doors are a perfect match to our greenhouse designs.  Doors are a very important part of your greenhouse.

What is the advantage of a Dutch Door?
Dutch Doors are doors which are split, allowing you to leave the top half open and the bottom half closed.  This keeps unwanted guests out of your greenhouse while allowing for optimum ventilation.  Ventilation is a very important factor in your greenhouse for healthy plant growth. See our Dutch Door page

What is a common size for a backyard hobby greenhouse?
This is dependant on yard space available and your budget.  8' x10' and 8'x12', 10' x 14, 10' x16' and 10' x20', 12' x 14',  12' x 16' and 12' x 20' 
 Free-Standing kits are very popular sizes.   

Lean-to  kit sizes vary because the kit attaches to homes and garages. 

How do your cedar greenhouses fair on cold winter days?  Will I be able to use my greenhouse then?
"Greetings from St. Charles, IL, where it is currently a balmy +2F. We have two small ceramic heaters going (thermostats set at 50F), and the inside temps have not dropped below 43F even when the outside temp was -23F yesterday morning. All through the wind, snow and dangerously cold weather, it maintains heat. When the sun is out, we’ve regularly reached 60-65 degrees these past few days of below zero temperatures. Yes, we were colder than Mars, but my geraniums, herbs and flowers are doing ok!"   Heidi

What if I receive a damaged or missing piece?
Cedar-Built Greenhouses  guarantees that if you have any problems with broken or missing pieces we will ship out a replacement part.  We have all parts in stock because we are the manufacturer.  Our sturdy plywood crating ensures a 99% damage free shipments.
What are the advantages of Twin Walled Polycarbonate over standard glass or single layered glazings?
Twin walled polycarbonate is the standard glazing supplied with our kits.. Guaranteed unbreakable, highly insulative, UV resistant, lightweight,  and 300 x stronger than glass.   Channels between the double walls trap air to reduce the risk of leaf burn, and eliminate condensation build-up, (dripping from overhead).  Our twin wall polycarbonate is precision precut to our specs by our supplier.  
Upgrades to triple walled 16mm polycarbonate available. 

If you prefer clear, see-through sidewalls we offer UV resistant, unbreakable, rigid 3mm clear plexiglass. Plexi-glass is used in many outdoor applications (including airplane windshields and baseball stadiums!) 
Clear 3mm plexi-glass has a life time warranty against any yellowing, breakage or any of mother nature's elements. This glazing is very popular for those who prefer clear viewing both in and out of their greenhouse walls. 

Can't decide?
Mix and match!  We can mix the panels as per your request.  Some folks prefer plexiglass on one or more walls facing their home or view.  Tell us what you want.  We can work with you.

​Will I require a building permit?  You should check with your local building department if you choose to get a permit. Often structures under 120 sq ft are free of this requirement.   Should you require a permit, we can assist you with providing building permit drawings. (foundation, elevations and roof framing plans) Normally this would be what is required.   There are variances between counties, states and possibly people within the department.  It's up to you to decide whether one is required.
In some situations stamped drawings by a state licensed engineer may be requested. You can provide your engineer with our permit drawings in this case.   If any small changes are called for we can work with you on this.  (these are rare situations)

How do I heat the greenhouse?  

Mr. McClure ( 8x10 ), " It really has been fun this winter, the temp was down around Zero last night and the inside of the greenhouse was around 55 degrees with just a 110 volt electric heater set on medium."
Mr.Saltzman ( 8x12 ),"I have put in an electric heater at the far end from the door and it maintains air temperature well.  This morning was 15 F and I went out to the greenhouse to water, it was a cozy 73.  I got my first electric bill since turning on the heat and did not notice anything dramatically different."

Mrs. Thiffault ( 8x12) "We are in the mist of winter and from our kitchen window and dining room windows our greenhouse is fighting the elements of whatever comes our way. Surprisingly with a few days of minus 13 night our roses and geraniums
have survived with no heat .( Andy insulated the base walls this fall). By the way our cat Oland loves to visit and sleep in the greenhouse."

Mr. Silva (10x18) "It is amazing how well the greenhouse holds the heat. The little electric heater runs very little after it gets the greenhouse warmed up.   It has been freezing every night but with the little heater it stays nice and warm."

These clients ordered the twin walled polycarbonate upgrade and insulated the cedar basewalls.
On cooler winter days the sun will warm your greenhouse significantly.  Cedar maintains the temp for long periods of ime. Many of our clients use small electric heater which they find adequate to ward of the chill in the evenings..  If you plan to run gas lines and a small furnace to your greenhouse, we suggest that you contact your local heating contractor.  He is the expert who will both install and warranty your furnace/heater for you.   Cedar is the warmest most insulative wood in existence.
What is timber frame construction?
Unique to Cedar-Built, our 3 ply (2x10 and 2x6) ridge beam is the strongest beam available in any greenhouse kit today.  This beam, coupled with our clear, knot-free 4x4 posts creates a backbone which stands up to any extreme element.   As solid as a rock, our kits are located all over the US in earth-quake, hurricane, and high snow load zones.   Additional 4x4 mid posts in any structure over 12'-0" long are used for structural integrity and high snow load locations.  See these photos for examples of our beautiful solid internal structures on the longer beam spans.

Our greenhouses are designed by a professional award winning designer with over 25 years experience in structural design. 

We have been in the professional structural design business for over 35 years. 
 We know design!
Our products speak for themselves.
The best ad is a quality product.

Copyright © 2000-2018 Cedar-Built Holdings, Ltd. All rights reserved
What is clear, Canadian Western Red Cedar.  How long does it last?
Our cedar is world renowned for it's longetivity.  Known to easily last well over 40 years, it contains natural oils which render it resistant to decay & insects.  Used in log homes, saunas, gazebos, fencing and roofing, it is the most insulative wood known to man.  We use only clear, knot-free kiln-dried Canadian Coastal CedarOur pictures and testimonials speak for it's awesome beauty.
Yes- our timber frame greenhouse designs handle extreme snow loads.  
Pictured is a 12'x22' in Northern Quebec, Canada in winter 2017 & summer 2018.