View Full Version : boat shed question
09-19-2004, 06:44 PM
I've just completed a stimson marine boat shed. http://www.imagestation.com/picture/sraid140/p98996c3a1fc2e3f05193ae758692ef4c/f6f28ce1.jpg http://www.imagestation.com/picture/sraid140/pb66701d372371cc4b9992180eae3617e/f6f4e221.jpg
I used 9 mil uvi shrink wrap for a cover. I did not shrink it. I just pulled it on as tight as I could. When I quit that evening, there were some lose spots I thought I would have to live with. By morning, the shrink wrap had pulled tight as a drum. It was cold and pooring rain all night.
What's the deal?
I'm happy with the way it looks, but am a bit concerned as to what might happen next.
Will it keep shrinking? will it get loose again when the weather changes. It seems to stablized over the last 24 hours or so.
Total cost $1250.00 and about 6 weeks of hard labor. this gave me a 3 season 14 by 30 foot work space.
[ 09-20-2004, 08:01 AM: Message edited by: joe schena ]
09-19-2004, 06:58 PM
The shed looks great, will you be able to grow tomatoes in a corner? ;)
09-19-2004, 08:16 PM
I hope to be growing a NIS 23
09-19-2004, 09:56 PM
I hope to be growing a NIS 23
:cool: :D smile.gif
09-19-2004, 11:40 PM
Best of luck with it, keep the photos coming! smile.gif
09-20-2004, 02:24 PM
That's a beautiful thing.
How much of that time and money was spent on the shed itself, versus the site preparation?
I need to do a 14X34 this fall, but I haven't budgeted anywhere near that kind of time or money for it. Site prep is a non-issue for my location, so I was hoping to do it for something like $700 over two weekends. Gimme a sanity-check.
09-20-2004, 02:58 PM
Great Shed! Good luck with the project - you're getting off on the right foot.
Figment: I built a 9x18 shed for ~$150. No ground prep like the big one though.
I also used standard Home Depot plastic sheeting. The UV resistand greenhouse stuff is a lot more. So chances are I'm doing it again next year...
Mine only needs to last 2 seasons though..
I took maybe 2 weeks at a very casual pace to build the whole thing (maybe 10-15 hours?)
09-21-2004, 08:14 AM
You'll need to bury some anchors to help hold down the strongback. And you'll need to make the strongback as level as possible to make things easier later (Specking from experience, here).
09-21-2004, 08:36 AM
"How much of that time and money was spent on the shed itself, versus the site preparation?"
figment, Minus about 200 bucks for the site prep. that will bring the total cost down to a grand. I used The white 9 mil shrink wrap was $270 delivered, but this was enough to do it twice. you don't have to spend this much. I'm planning for mine to be up for a long time. When I say I started in August, I mean I started building a few bows a day in my basement.
I also spent a lot of time dealing with the sloping knee wall on one side. getting the whole thing level was a pain.
The shed took 3 days to fully erect. It took another 2 to cover. the whole thing went up monday thru friday of last week. inquire about permits early. start building your bows now.
Jack, I spent yesterday and will spend a good part of today pooring concrete into post holes for the building frames.
Feel free to post any of those pics on the NIS site.
P.S. I called pro-tect about the misterious shrink wrap tightening with out heat. They pionted out that this was imposible and infact, the frame might be swelling with the moist air intake of the rain storm. Makes sense to me.
[ 09-21-2004, 08:46 AM: Message edited by: joe schena ]
09-21-2004, 09:27 AM
Ok... I've never built one of these sheds, and I've never used this shrink plastic, but...
the moisture is not going to swell your frames significantly lengthwise so I doubt that tightened your fabric.
What I suspect is just temperature. plastics expand and contract a lot with temperature. My guess is that when you put it on it was relatively warm and then it cooled and shrunk a little. If I'm right, then on a warm day the wrap will be slack again.
09-21-2004, 10:09 AM
It sounds like I'm a little underbudgeted moneywise, but not by much. Like Bob, I don't need it to last for years and years. Really, I only NEED it for this coming winter, anything beyond that is gravy.
Time, on the other hand.... That's something I'll run out of in short order. I'm not going to be able to start on this until November, so it sounds like I'll need to hustle if I want this thing up before snow flies.
Thanks for the feedback, Joe. Looking forward to seeing progress on the NIS!
09-21-2004, 03:07 PM
between you and me, my intention is to build more of a shop than a shed. I'm planning mutiple boats. I'm sure you can do it quicker and for a lot less.
09-21-2004, 03:49 PM
I built a similar shed for Torna (tho no where near as nice looking). 2 weekends, 20x39, $350.
Just used ordinary 6 mil poly sheeting for the cover. Put it in in the fall as tight as I could pull it. During cold snaps in the winter (-20F) it became drum tight. Come the warm weather of summer and it was loose & floppy.
The UV degraded it so that mid-summer it blew itself to ribbons; won't be able to check whether the same piece of plastic would shrink tight again. But this year will be putting some of the greenhouse plastic on it as Torna is gonna live there for several seasons.
09-21-2004, 04:58 PM
This 6mil polyethelene.... it's white or clear? I've not found any white stuff locally, though I admit I haven't been searching with a great deal of intensity.
In addition to the fact that I'd rather NOT have the greenhouse effect of clear plastic, I'm going to be in plain sight of a rather heavily-trafficked road and I don't really want the whole world knowing what's going on inside.... open the hatch one morning to find a bunch of tools missing, etc.
At this point, that's about all that would push me into the expensive/heavy white plastic sheeting.
Joe, if I could trouble you for a bit more info...
What's the width of your shed/shop at 7' height?
Roughly what is the ridge height?
(I'm still waiting for my plans to arrive from Stimson)
09-21-2004, 05:16 PM
My 6 mil poly sheeting was the clear (cloudy) variety. I happened to leave the ends largely open so always had a bit of a breeze - the greenhouse effect wasn't too bad.
BTW, upon closer examination of the failed plastic, I found much abrasion along the entire length where it hung over the ridge pole. And some of the joints in the ridge pole had moved making some sharper corners that were working on the plastic.
For this year, I took an old carpet discarded by SWMBO and cut it into strips about a foot wide. These will be stapled to the topside of the ridge pole - in hopes to reduce abrasion and sharp spots.
09-21-2004, 06:05 PM
at 7' hieght the shed is 10' wide.
the ridge pole is 11' off the floor.
09-21-2004, 10:31 PM
awsome. Plans available.? :D
09-23-2004, 09:27 AM
Figment it looks like I'll be making a couple of frames this fall. Drop me a message if you need a hand with the frames. I have a couple of bending jigs setup to make the arches.
Stimson marine offers detailed plans and theres a back issue of woodenboat that goes over the construction don't have the issue # here but will check tonight.
09-23-2004, 12:08 PM
Thanks Raycon, I'll do that. (just so long as you don't mind aiding the shelter of a plastic boat)
Do the folks at Stimson ever pick up their phone or do they do everything through the answering machine?
Thanks for the dimensions, Joe. Looks like I'd better go 16' wide after all. It's only money, right?
[ 09-23-2004, 12:58 PM: Message edited by: Figment ]
09-30-2004, 05:10 PM
Very nice job on the shed. I think you and I may have emailed several months ago about this topic. I shrunk the shrink-wrap on my shed and it may have been a mistake after seeing your results. Yours appears to be much more substantial than my installation. I found the shrinking process with the Dr. Shrink heat tool not very controllable on such a large project. This may have been due to my lack of experience however. I found it very hard to control the heat/rate of shrink with the extreme volume of heat/flame that shoots out of the heat tool. Kind of like using a sledge hammer to drive in a finishing nail. As a relult, I have many areas of extremely thin material and a few burn holes (that I taped over). Hope it lasts for the year.
I will tell you that the shrink wrap DEFINATELY does expand and contract with the ambient temperature. During the day, the material is quite tight, and in the cooler evening, there are many wrinkles that form.
Good luck and keep sharing your progress...Mark
09-30-2004, 05:20 PM
OOps...I meant to say.....During the day there are many wrinkles, but in the cool hours of the evening, the material is tight as a drum.
Sorry for any confusion.
10-01-2004, 06:53 AM
Joe, a lovely structure ! smile.gif If I may offer a small tip on using cheap plastic.If you paint the stuff with cheap white latex paint you get fairly good UV prevention,no figures on how much longer it will last.The light still penetrates...but not as much.I've used it on cheap Chinese blue tarps too.
10-01-2004, 07:53 PM
I use a Cover-It,and no I dont work for them,but I'm gonna tell ya,these folks have the tarp-frame technique down pat.I understand their concept came from Military portable units perfected in the World Wars.I live in a high wind area and I thought I would get a couple of years at best,to use as a paint/drying shelter(I ordered the greenhouse model,no extra charge and the opaque milky white tarp was tough!After five years the thing is still good to go,and I've seen it withstand sustained 30 mph winds with gust up to fifty.Sometimes the zip up door was partially open(a no no),the thing inflated like a ballon and stayed that way.The kit seems flimsy when you get it,but properly installed,with the screw in ground anchors,these things work!I laid a simple floor of exterior OSB 3/4 sheets on top of a ground tarp,nailing them with cheap truss plates.I'm going to pull a 63 VW panel truck into mine tomorrow to dry it out before a winter restoration.
10-02-2004, 06:46 PM
When pro-tect told me the BTUs needed. I chickened out with the shrinking. The shed is only 4 feet from my house.
Any thoughts on moisture control. Should it be tightly sealed or well vented or both at different times. The thing is a water maker :( I should take it to sea after :D
10-03-2004, 08:07 AM
Hi Joe....I haven't experienced much in the way of excess moisture as of yet, but its only been up since May. I have two large "windows" on each end gable that I have kept open most of the time. Maybe this is why moisture doesn't collect. I have the same site situation as you and errected knee walls like yours to get the shed level...however the floor drops off about a foot across the width. Sure would have been nice to dig out the floor...but I hate digging.
I don't know why the pictures I included with my post are not showing up properly, but if you right click on the little squares and select properties, the URL is available to paste into another window...just in case you want to see my shed.
My shed will soon contain a 1955 18 foot Chris Craft Holiday that needs complete rebuilding. This is my first attempt at restoration and I am looking forward to the project. Keep us posted on your project.
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