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 Post subject: Re: DIY PVC Hoophouse
PostPosted: Nov 6th, '17, 04:04 
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 Post subject: Re: DIY PVC Hoophouse
PostPosted: Nov 6th, '17, 08:54 
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Really like the design you have produced. I had to replace one layer of film from the hail damage and may try to salvage some of it with a smaller foot print.

Adam


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 Post subject: Re: DIY PVC Hoophouse
PostPosted: Nov 6th, '17, 20:17 
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I still need to add purlins to tie the PVC together at the mid points, and still need to pick up felt and go back and add the felt over the PVC so it's not in contact with the plastic... will work on some of that this week. I am going to move some of the items that are taking up space in the small greenhouse out to the hoop house now that it is more or less enclosed. I haven't decided what I'm going to do for a door yet. I am thinking I might just get a screened storm door and mount it on there... either that or I have a couple of interior doors that I took down with frame still that I could just put a few coats of paint on and mount one of them out there for now... would be cheaper and should last a few years I would think.

If I make it to home depot this week I might buy the lumber to start building the main bed in the hoop house. It is going to take a LOT of dirt to fill it so it will probably be a while before I can actually grow anything in there. I'm planning on it being about 25ft x 6ft bed built probably out of 2x10's... I am thinking we might need to get another 10 yards of dirt delivered in the spring, so I might not start growing in there until next year... I will work on building benches out there this winter so it is ready for seed trays by spring.

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 Post subject: Re: DIY PVC Hoophouse
PostPosted: Nov 6th, '17, 20:35 
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I have GH film resting directly on my metal frame as installed from manufacturer. When the sides were operable, yes film tore.

Since I did away with roll up sides, once secured, only tears have been that caused by hail.


I would not go through the hassle after having this up since 2013 and replaced the top layer back in 2013 (only b/c of another error when mowing/weed eating close proximity.

Adam


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 Post subject: Re: DIY PVC Hoophouse
PostPosted: Nov 6th, '17, 22:28 
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Adam from what I've read the cover should be fine against metal, you do get the small movement of plastic against whatever it is touching slowly wearing on it that might cause a rip eventually, but the bigger concern is that with PVC hoops the PVC releases chlorine in to the air due to degradation from the sun. That causes a reaction with the plastic which causes it to fail faster. The guy down the road from me said he still managed to get 6 years out of a 4 year plastic, but where it finally failed was where he did not have felt so the PVC was contacting the plastic.

My wife was at Joann fabrics a week or so ago and said they had felt on sale for about $4 a yard (which to me is actually two yards because they doubled it up so the piece of felt she bought for $4 was 36" wide x 72" long...). I think for 3 or 4 yards I could cut enough strips to cover all of the PVC just to be safe... for under $20 and probably no more than a couple hours worth of work it will be a cheap investment to help extend the life of the plastic... plus the plastic warranty explicitly states it's void if it is installed contacting PVC (for whatever the warranty is actually worth...)

The alternative was to cover the hoops with duct tape... duct tape the top layer is polyethylene which matches the greenhouse plastic so it wouldn't have interacted, but that ship has sailed now that I have it covered (I did cover the first end hoop because I had started putting a separate piece of plastic on it on Saturday, so I just covered the PVC with duct tape on that end).

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 Post subject: Re: DIY PVC Hoophouse
PostPosted: Nov 6th, '17, 22:41 
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That is some fantastic progress on the hoop house. Thanks for sharing the information on the interactivity between different types of plastics.

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 Post subject: Re: DIY PVC Hoophouse
PostPosted: Nov 6th, '17, 23:42 
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boss wrote:
That is some fantastic progress on the hoop house. Thanks for sharing the information on the interactivity between different types of plastics.
+1

Adam


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 Post subject: Re: DIY PVC Hoophouse
PostPosted: Nov 9th, '17, 04:41 
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Might be getting ahead of myself... Just went to Lansing to buy the felt for the greenhouse... 21 bucks for four yards of 72 inch wide felt. I think it should be enough. I am on vacation for the next 18 days... Thursday Friday and Monday I am home with my son so not sure if I'll get anything done or not... then the 15th starts hunting season that I'll be in the woods. I do have the 14th that I'll be home alone so maybe I'll get felt cut into strips between now and then and be able to put them on the greenhouse next Wednesday if I don't get a chance over the weekend. I also bought the lumber to build my super mega bed in the hoop house.

I bought 2x12 boards for the bed... Debating if I should make it a wicking bed seems how I don't have water close by would make it hold water longer. Or if I should cut the plastic out and buy a flame weeder to torch the weeds under the bed.

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 Post subject: Re: DIY PVC Hoophouse
PostPosted: Nov 9th, '17, 22:38 
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I know it gets very exciting at that stage you are at with your new greenhouse. It's like we need a bridle to keep us in check. It's twenty 28° here, what's it like up in Michigan?

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 Post subject: Re: DIY PVC Hoophouse
PostPosted: Nov 11th, '17, 00:54 
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I have 22f right now at almost noon Friday. 55f in the greenhouse. 62f in the hoop house and the sun is shining so both should warm up a lot today, but our high outside will be 28f today.

I am working in the hoop house for a bit while Sam sleeps. I got felt on half the hoops so far, just have to do the north half this afternoon once it is warmer for a while. There is a lot of condensation frozen inside right now so I will wait for it to melt this afternoon then finish the felt.

In the meanwhile I am assembling the main raised bed. We had some design changes last night so big bed will be 30ft x 6 ft now because that's the lumber I bought and we are going to put all of the seed shelves on the north wall now as well as our work bench so that means I will build a 2ft bed the entire 40 ft length on the south wall as well as a 2ft bed along the west wall
.. trying to fit more beds in to decrease the cost per square ft of growing.

I will work until I get a text that Sam is awake. Had to reinstall his baby camera so I can work while he sleeps and get notifications on my phone when he wakes up.

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 Post subject: Re: DIY PVC Hoophouse
PostPosted: Nov 13th, '17, 08:36 
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What temperature does your hooop house maintain if ambient is in the 40s, 30s, or 20s at night?

Thanks!

Dan


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 Post subject: Re: DIY PVC Hoophouse
PostPosted: Nov 13th, '17, 09:51 
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It's 35f outside right now. 39f in the hoop house 45f in the greenhouse. Was rainy all day today, no sun. There isn't any mass in the hoop house yet and the door isn't enclosed yet so it probably hits ambient temperature by morning.

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 Post subject: Re: DIY PVC Hoophouse
PostPosted: Nov 15th, '17, 01:10 
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I have a door! Made it so you can open the top without opening the bottom to add to air flow. I need to pick up a latch to attach the top door to the bottom so it latches until you unlock it to open it... That way in the winter you only have to open one door and they both open.

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 Post subject: Re: DIY PVC Hoophouse
PostPosted: Nov 20th, '17, 03:16 
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I forgot to post these, I built the big bed in the hoop house last week before I put the door on that I already posted pictures of.
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I raked some of the leaves and put them in the bed to add organic material and reduce the amount of dirt I need to add I'm the spring.

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Sam thought the leaves we're fun to play in and lay in. He is going to help crunch to leaves down all winter it will make a decent play area on sunny days when it's too cold to be outside otherwise this winter...
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I started building my benches too but forgot to take a picture of them.

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 Post subject: Re: DIY PVC Hoophouse
PostPosted: Nov 20th, '17, 05:29 
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You actually live in those temperatures :support: :dontknow:

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