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You are here: Home / Uncategorized / How To Make A Cold Frame

How To Make A Cold Frame

Emma @ Misfit Gardening · March 28, 2016 ·

Winter is on the way but it doesn’t mean the end of growing fresh produce!  Today’s post is how to build a cold frame step by step using a door I bought from the Habitat For Humanity Restore Salt Lake City.

This post contains affiliate links: I am grateful to be of service and bring you content free of charge. In order to do this, please note that when you click links and purchase items; in most (but not all) cases I will receive a referral commission. Your support in purchasing through these links enables me to keep blogging to help you start homesteading and it doesn’t cost you a penny extra!

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How to build a cold frame using a repurposed door. Click to find out how to upcycle a door to grow food or pin it and save it for later.

Those of you who have been reading, know that I LOVE Habitat For Humanity Restores and with all the garden projects, we frequently head on down there to get supplies.  Unfortunately I have not managed to pick up lumber from there yet, so we hit Home Depot and Lowes for the wood for this project and used all off cuts and scrap from the house remodeling projects too.

How much did it cost?

Some estimates are below for the total cost of lumber (if buying new) and the specialty screws we needed to ensure a flush finish.

Door $5
Kreg Jig Screws Pack $22 (24 screws used)
Studs x 6  $14.70
Particle board (Plywood) $30
Brad nails $8

It should be noted that the cold frame is the full length of the door and 2 feet deep at the back and sloping to 16 inches at the front, which is larger than many off the shelf cold frames.  I wanted something deep which I can line with plastic (to protect the wood on the inside) and fill with compost or make into a hot bed or hot box.

Want to know more about hot beds/hot boxes? Then check out my post Starting Seeds In Winter to find out more about this Victorian growing trick.

Step By Step: How to Build a Cold Frame

When building always remember, safety first and ensure you have appropriate protective equipment for the task you are going to be doing.

urban homesteading

Step 1: Measure and Cut Front and Back Panel Pieces

The Door

Using the door as the starting point, measure the length and width.  If you can get a door with the hinge still attached, it makes putting the lid on the cold frame easier.

Mark out cutting lines

Measure and mark out the length (which will match the door) and height of the back piece of particle board or plywood.  The height of our cold frame is 2 feet at the back.

Measure and mark out the length and height of the front piece of particle board or plywood, ours is 16 inches high and the length matches the length (height) of the door.

Remember measure twice, cut once!

Cut

Cut the pieces out, always line up the saw blade to the line on the scrap/waste side of the line to ensure accurate measurements throughout the building process.

Step 2: Measure and Cut Frame

Measure studs

Measure the length of the stud which should be the same as the length (height) of the door.  Mark off the length and draw cutting line, ensuring you are square.

You need to measure 4 length pieces and 4 width pieces.  The widths should be the same as the width of the door minus the width of the two length stud pieces for the frame.

Cut Studs

Double check the measurements then cut the stud, ensuring you line up the blade on the scrap side of the stud.

Step 3: Put the Frame Together

nail the frame

Nail the top and bottom frames together.

Base frame

Next, you need to create the risers for the frame.  These need to be angled at one end to allow them to fit flush against one frame.  The back pieces would give a total height of 2 feet (including the studs the risers are connected to) at the back and 16 inches at the front.

Pocket holes

We used a Kreg Jig to create pocket holes on the bottom of the pieces.  A total of six pieces were needed, three at the back and three at the front.

We fixed two pieces; one at the back and one at the front of the base frame so we could line up the angle of the top frame.

Using the chalked string marker, one end was held tight at the top corner and the string stretched down to the bottom corner.  The string was snapped to give a chalk line and the angle taken to then transfer to the other pieces.

The test pieces were unscrewed and cut, along with the rest of the risers.

Angled riser

Here is a cut riser.  These then need to go on the Kreg Jig to make the pocket holes to attach to the top frame.

more pocket holes

Once all of the pocket holes are made on the lowest side, it’s time to fix the flat edge to the base frame.

Riser on base

The risers are then screwed onto the base frame using Kreg screws.  As you can see, the pocket hole method uses smaller screws and fits flush with the base.

Framing up

Once the risers are attached to the base, place the top frame on the bottom and place the base frame on top.

joint close up

The angle cut enables a flush join.

Step 4: Nail on Panels

Add the panels

In this picture we’re checking the look of the panels cut note that the angle is not flush.  I didn’t like it so onto the table saw it went.

cut with a table saw

The smaller piece is added to cover the stud just above the main panel.

Attach the panel

We used a brad gun to nail the particle board/plywood to the stud and frame supports.

The back

Here you can see the small off cut piece attached to the back stud.

the front cold frame

The same thing was done on the front of the cold frame.

cold frame side panel

We actually had some angled off cuts that fit the side panel and a thicker piece of particle board to use and a carrying hold.  If you don’t happen to have the right angled pieces cut, use the frame as a guide and mark off the angle to cut out.

cold frame side detail

The carrying hold isn’t very wide but it serves its purpose.

Step 5: Attach the door for a Lid

Cold frame lid

Lay the door on top of the frame and check the opening. We needed to flip this door over and cut out some of the hinge to accommodate the width of the stud and particle board on the frame to enable free movement of the door.

back of cold frame lid handle

String up a handle, we used paracord.

Lid handle

You don’t have to use string as a handle, a door handle will work too.

Cold Frame

Here’s the completed cold frame ready to be stained/varnished or painted.

Here’s some tools which we used that were extremely useful in building this cold frame which we found were worth the investment:

 

If  you liked this post please take a moment to share it using the share buttons below or pin the image below to Pinterest and save it for later.

How an old door can be turned into a cold frame. Click to find out how to upcycle a door to grow food or pin it and save it for later.

As remuneration for running this blog, this post contains affiliate links. Misfit Gardening is a participant in Affiliate or Associates programs. An affiliate advertising program is designed to provide a means for this website/blog to earn advertising fees by advertising and linking to websites offering products described in the blog post.  It does not cost you the Reader anything extra. See Disclosures, Terms & Conditions and Privacy Policy for more information.

 

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Filed Under: Uncategorized Tagged With: how to build a cold frame, how to build a cold frame using a door, how to make a cold frame, how to make a cold frame using a door

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I’m Emma the Misfit Gardener.  I have a passion for growing and raising organic food on my suburban homestead in my backyard and making home brew!

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