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Old 29-10-2015, 12:14   #16
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Re: Longevity of truck PVC tarp in the tropics?

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Originally Posted by Franziska View Post
Hi,

I am considering of getting a stackpack (=the permanent fixed combination of lazyjack & sailcover).

As I am on a budget and this cover stays fixed on the boom, I am wondering if it could not be made of the same material trucks use to cover the loading bay.
Usually it is a PVC covered cloth.

It is surely heavier than Sunbrella but material costs will be a fraction.

Just not sure how well it lasts in tropical sunlight.
Anyone has experience/tried this?

Along the lower edge I will have a mesh strip for aeration.

The PVC material is fully waterproof.
By the way, any recommendations on weather Velcro or a heavy duty zipper is better (longevity)for closing the stackpack?

Thanks for your thoughts!

Franziska
Those tarps wont last long in the tropics. Sunbrella is pretty hard to beat.

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Old 29-10-2015, 14:00   #17
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Re: Longevity of truck PVC tarp in the tropics?

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Originally Posted by Franziska View Post
Hi,

I am considering of getting a stackpack (=the permanent fixed combination of lazyjack & sailcover).

As I am on a budget and this cover stays fixed on the boom, I am wondering if it could not be made of the same material trucks use to cover the loading bay.
Usually it is a PVC covered cloth.

It is surely heavier than Sunbrella but material costs will be a fraction.

Just not sure how well it lasts in tropical sunlight.
Anyone has experience/tried this?

Along the lower edge I will have a mesh strip for aeration.

The PVC material is fully waterproof.
By the way, any recommendations on weather Velcro or a heavy duty zipper is better (longevity)for closing the stackpack?

Thanks for your thoughts!

Franziska
We got about two years max out of the blue and green pvc tarps in Hawaii. By that time they are sun rotted and leave scads of small flakes all over the place. Lasts about one year if your exposed to strong trade winds. Since they have very little stretch, the grommets tend to rip out within a year's time if exposed to constant trades. Finally, they do not allow moisture to excape so you will run into moisture(mold) problems.
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Old 29-10-2015, 15:58   #18
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Re: Longevity of truck PVC tarp in the tropics?

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We got about two years max out of the blue and green pvc tarps in Hawaii. By that time they are sun rotted and leave scads of small flakes all over the place.
That's the real bitch! The stuff is a real PITA as soon as it starts breaking down - long before its end of life.
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Old 29-10-2015, 16:42   #19
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Re: Longevity of truck PVC tarp in the tropics?

Franziska unless the truck tarps you are talking about, are different, than the ones here in the states, I would not recommend them, as they do not like to have creases in them! It creates stress areas, that will weaken the pvc laminate. The tarps are meant for more straight line pulls, if you understand what I'm talking about. To use them for a sail cover, they would be contorted in shape! I understand you would have them/it made to fit, but nothing fits exactly right, which is the draw back with this type of material! This from experience, as I was in the field, of trucking for 40 yrs.
Also I would be concerned about sweating, at the up side inside.
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Old 29-10-2015, 22:25   #20
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Re: Longevity of truck PVC tarp in the tropics?

Hi everybody, got the drift. Not gonna use the PVC.Thanks everybody!
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Old 30-10-2015, 09:22   #21
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Re: Longevity of truck PVC tarp in the tropics?

I'm not a fan of stack packs. Seems to me that opening in the top lets in rain, which promotes mold and mildew. Just now thinking of it, do stack packs cause chafe on the sail as the wind shifts the pack back and forth???

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Old 30-10-2015, 09:28   #22
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Re: Longevity of truck PVC tarp in the tropics?

Mine would have two flaps on the upper inside with a zip or heavy duty velcro so that it can be closed.
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Old 30-10-2015, 14:57   #23
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Re: Longevity of truck PVC tarp in the tropics?

I live in Texas. I have replaced the tarp for my boat with those cheap plastic covers from Home Depot every few months to a year. This year I sprang for a Vinyl cover. It seems to be holding up great. The only problem of course is that vinyl covers are four times more expensive. I have a small boat.
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Old 31-10-2015, 11:29   #24
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Re: Longevity of truck PVC tarp in the tropics?

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I live in Texas. I have replaced the tarp for my boat with those cheap plastic covers from Home Depot every few months to a year. This year I sprang for a Vinyl cover. It seems to be holding up great. The only problem of course is that vinyl covers are four times more expensive. I have a small boat.
Which is why sunbrella and similar canvases are best buys since they last about 10 years in subtropic environments, are water resistant, and allow moisture to flow through to prevent mildew buildup.
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Old 31-10-2015, 11:36   #25
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Re: Longevity of truck PVC tarp in the tropics?

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Which is why sunbrella and similar canvases are best buys since they last about 10 years in subtropic environments, are water resistant, and allow moisture to flow through to prevent mildew buildup.
I've never seen stitching last anywhere near that long. I hope Sunbrella does not allow moisture to "flow through". I use our bimini as a rain catchment. It stays pretty dry on the bottom side.
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Old 31-10-2015, 15:19   #26
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Re: Longevity of truck PVC tarp in the tropics?

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I've never seen stitching last anywhere near that long. I hope Sunbrella does not allow moisture to "flow through". I use our bimini as a rain catchment. It stays pretty dry on the bottom side.
Had sunbrella dodgers, sail covers, and bimini, never had a problem with it letting water through. You do want moisture to get through, like goretex does, in order to prevent mildrew and other nasty stuff growing in an air tight environment. BTW: the blue or green sunbrella seems to last longer than the white. Practical Sailor did a whole research on this issue. In any event, plastic tarps are not the way to go in hot and sunny climates, regardless of price.
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