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Homemade Shed Fruiting Chamber

On this rather strange UK bank holiday where we had thunderstorms and 26c weather, I decided that my ‘new’ fruiting chamber setup was completely inadequate. This is for several reasons, however, the main one was that it was setup in my shed and even though I put some plastic down water was still leaking into the flooring. Not good.

Homemade Shed Fruiting Chamber | Archers Mushrooms | Mushroom Blogs | Mushroom Growing | Mushroom Tips | Mushroom Business

So, what do I do? BUY ANOTHER SHED OF COURSE. So that was my weekend. I was building a new fruiting chamber. Here is how it went….

Homemade Shed Fruiting Chamber | Archers Mushrooms | Mushroom Blogs | Mushroom Growing | Mushroom Tips | Mushroom Business

It started out with thinking of a location, rather tied up on space I had only a small 3ft x 4ft area to play with, fortunately a 3×4 shed was available. I ordered it and they delivered it the next day as… flatpack.  It wasn’t a difficult thing to put together but did take about 90 minutes due to a couple of mistakes I made.

Homemade Shed Fruiting Chamber | Archers Mushrooms | Mushroom Blogs | Mushroom Growing | Mushroom Tips | Mushroom Business

But that’s all hunky dory. Now, the reason I moved out of my current shed and into a new one was the problem of water, so obviously, I needed to waterproof this shed as best as possible. I also needed to insulate it. For this, there were two options. Polystyrene or Insulation board.

Homemade Shed Fruiting Chamber | Archers Mushrooms | Mushroom Blogs | Mushroom Growing | Mushroom Tips | Mushroom Business

Obviously, I would have loved insulation board but given that one sheet was £20 and, if costed correctly, the whole shed would have cost about £60 – £70 to do, I went with polystyrene for the grand cost of about £30.

Homemade Shed Fruiting Chamber | Archers Mushrooms | Mushroom Blogs | Mushroom Growing | Mushroom Tips | Mushroom Business

This had a few disadvantages, it wasn’t a clean surface like the insulation board. The insulation board had a flat surface that could be wiped down and cleaned when needed, polystyrene didn’t so I needed to find a solution. It’s also a less efficient insulator, hence the price, but it would do for me.

Homemade Shed Fruiting Chamber | Archers Mushrooms | Mushroom Blogs | Mushroom Growing | Mushroom Tips | Mushroom Business

Cutting was easy, I kept a blowtorch on standby and just heated the blade of a cheap retractable Stanley and ran it along a straight bit of wood. I fixed the polystyrene to the walls using adhesive in a silicone gun thing but only in a ‘dot and dab’s type fashion.

Homemade Shed Fruiting Chamber | Archers Mushrooms | Mushroom Blogs | Mushroom Growing | Mushroom Tips | Mushroom Business

Next, I had to cover the polystyrene so that the condensed water would run down the walls onto the floor and not rot the wood or cause a mould build up somewhere uncleanable, also making it much easier to clean the walls.

Homemade Shed Fruiting Chamber | Archers Mushrooms | Mushroom Blogs | Mushroom Growing | Mushroom Tips | Mushroom Business

I got my sheet from Screwfix, but you can get the same size on Amazon or eBay. I measured cut the sheet in sections and then fixed them with a staple gun to the wood and into the polystyrene. A tip if you’re trying to fix the sheet onto polystyrene boards is to make an ‘X’ with the staples. Single staples pull out easily but when they’re crossed over the bond is stronger!

Homemade Shed Fruiting Chamber | Archers Mushrooms | Mushroom Blogs | Mushroom Growing | Mushroom Tips | Mushroom Business

Next came the floor. I got some cheap-cheap lino from B&Q for £22 which was the cheapest I could find for the quantity I need (I’ve still got loads if anyone wants it), cut it and glue it to the floor using spray glue. I then cut it into place and made sure it was extra secure with a few staples around the edge

Homemade Shed Fruiting Chamber | Archers Mushrooms | Mushroom Blogs | Mushroom Growing | Mushroom Tips | Mushroom Business

Next, I ran a huge bead of silicone around the edge of the floor where the sheet meets the lino, that way all scum and water run onto the floor from the roof and sides rather than into the wooden floor of the actual shed.

Homemade Shed Fruiting Chamber | Archers Mushrooms | Mushroom Blogs | Mushroom Growing | Mushroom Tips | Mushroom Business

I then worked out which way water would want to run on the floor and it happened to be towards a corner. I then cut and drilled a drain hole where water could be ‘squeegeed’ out every so often.

Homemade Shed Fruiting Chamber | Archers Mushrooms | Mushroom Blogs | Mushroom Growing | Mushroom Tips | Mushroom Business

With the shed complete it was now time to think about airflow design. I used the same ‘box-style’ humidifier you can read about here which uses an ultrasonic mister to vaporise the air and a fan to blow it out of the box and into the chamber. Pretty simple

Homemade Shed Fruiting Chamber | Archers Mushrooms | Mushroom Blogs | Mushroom Growing | Mushroom Tips | Mushroom Business

You can see that pipe goes out of the main shed and into the new fruiting chamber at the top. I was unsure about where to put this inlet to be honest, working on the basis of heat rising and C02 being heavier than air…

Homemade Shed Fruiting Chamber | Archers Mushrooms | Mushroom Blogs | Mushroom Growing | Mushroom Tips | Mushroom Business

I put my inlet at the top and my exhaust at the bottom. Both of which use the great cheap little Orchid fans.

Homemade Shed Fruiting Chamber | Archers Mushrooms | Mushroom Blogs | Mushroom Growing | Mushroom Tips | Mushroom Business

However, I definitely need a bigger fan now my chamber is 8 times the size as it was before, so that is something I will be working towards. Although this fan keeps up with the small number of mushrooms I have in there right now, as it fills up humidity, C02 and FAE will all need to be scaled up. Ideally the room would have ‘positive pressure’ so that Is what I will work towards.

Homemade Shed Fruiting Chamber | Archers Mushrooms | Mushroom Blogs | Mushroom Growing | Mushroom Tips | Mushroom Business

As you can see, the electrics for now is a simple Tupperware box with some holes melted out of it using an old soldering iron, I’ve got an Arduino temp/light/humidity project in the works so once I’ve built that whole system I’ll make the electrics a little less… illegal?

Homemade Shed Fruiting Chamber | Archers Mushrooms | Mushroom Blogs | Mushroom Growing | Mushroom Tips | Mushroom Business
Homemade Shed Fruiting Chamber | Archers Mushrooms | Mushroom Blogs | Mushroom Growing | Mushroom Tips | Mushroom Business
Homemade Shed Fruiting Chamber | Archers Mushrooms | Mushroom Blogs | Mushroom Growing | Mushroom Tips | Mushroom Business
Homemade Shed Fruiting Chamber | Archers Mushrooms | Mushroom Blogs | Mushroom Growing | Mushroom Tips | Mushroom Business
Homemade Shed Fruiting Chamber | Archers Mushrooms | Mushroom Blogs | Mushroom Growing | Mushroom Tips | Mushroom Business

So that’s it. My little homemade fruiting chamber. I’m defiantly pushing the limit only using 1 mister. If I keep the door shut and don’t keep peaking, the humidity rises to 96% overnight before I ruin it and it drops to around 80%, I’ll address this amongst other nagging concerns a little later on! Mushrooms are tenacious, although they prefer crazy high humidity, they will still thrive on less than optimal! As Matt Smalls Blue Barrel Tek proved, you can grow outside without any extra humidity concerns!

If you’re interested in buying any gear mentioned in this blog  you can checkout my shop (coming soon) or you can use the links above which are eBay and Amazon affiliate links which help support the blog! If you click those links, whatever you buy within 24 hours, I will get a small % fee for referring you to Amazon and eBay, it costs you nothing and benefits the blog greatly! Thanks for reading!

This Post Has 2 Comments
  1. Hi there,

    First off, I would like to say that I love your enthusiasm in mycology and your excellent technical skills! I have been reading through your blog and checking out your YouTube channel and I’m really impressed by how quickly you advanced in mycology.

    My partner and I run a website dealing with substrates, spawn, cultures, spores, etc. and are looking to address a bottleneck in the production of spawn and substrates. We have taken some time off to work on resolving the efficiency issues we have.

    After first checking out Bubba’s Barrels – we found your channel as you built a similar steriliser. Can I ask how far you got with it and whether you have been working on it more since last year? The reason I ask, is that we would be very interested in obtaining one if that was a possibility?

    Drop us an email any time if you’re interested in having a discussion about it!

    Kind regards,
    Nick

    1. Hello mate. Cheers! I appreciate it. I’ve had to change jobs so i’ve been living in a flat and only been growing with a PC and a grow tent. I move to a new job again soon so i’ll be back updating my blog/videos regularly! I’ll bash you an email across! Cheers!

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