Should a boat cover always be waterproof?

country_bumpkin

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May 9, 2007
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Okay, I did do some research before posting this and everything I saw said a boat cover should be waterproof. I just purchased a 20' pontoon. It was wrapped and stored under a carport and is in great shape. I have no carport or garage to put it in at the moment, but it did come with the cover that it had on under the carport. It has rained the last few days and I have been out of town. I expected pools of water in the cover where it didn't drain, but the water goes right through! Is this just a dust and UV cover? Should I do something to waterproof, or provide additional H2O protection? I hate seening boats exposed to the elements and torn apart by UV, water, dust, leaves.......Thanks for looking and your input.

CB

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Jeep Man

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Re: Should a boat cover always be waterproof?

I too have a newer 20 ft toon and it to came with a cover as well. Mine has poles to tent it and let water run off. It's fabric and I had planned to treat it with a waterproof spray. In your case, if it was waterproofed, water would pool and cause more problems by ripping. If I was in a warmer climate, I would consider on of those tent type storage garages. It may work for you.
 

dodgeramsst2003

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Re: Should a boat cover always be waterproof?

Whether its waterproof or not depends on the type of material. Not all materials are waterproof from the mill. Some need to be treated with a waterproofing spray. Some that are waterproof that come to mind are sunbrella and top gun. I know theres more but those are the two I use the most when making covers. One common material used is Duck canvas and this by itself is not waterproof. Get yourself some waterproofing spray and have at it. You might also want to invest in some support poles to "tent" the middle so water runs off.
 

Gary H NC

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Re: Should a boat cover always be waterproof?

Most covers claim water resistant not waterproof...
The tent poles are a must or water will pool and stain and leak through the cover..

Congrats on the new boat CB!!!:D
 

ebry710

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Re: Should a boat cover always be waterproof?

I do not think you need a water proof cover, in fact if the tarp is too water tight it will mildew in the boat which is the worst thing to happen. UV and dirt are my two concerns.
 

scipper77

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Re: Should a boat cover always be waterproof?

There are 2 important issues here. First you want a material that breathes, with poles set up so that the water doesn't pool. this way you don't trap moisture under the cover.
Second, when you use a waterproofing spray you don't want to use the stuff for tents. I can't remember the details but there is a specific kind for boat canvas.
I hope someone else with a better memory than myself chimes in with the inns and outs of waterproofing marine covers.
 

country_bumpkin

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Re: Should a boat cover always be waterproof?

All good points. I think I will try to treat the fabric and also put poles/supports so the water will run off quick. It may not be 'waterproof' then, but hopefully the majority of the water will run off the cover. Right now it goes right through and collects on the floor until there is enought to spill of the side of the boat.

and thanks GaryH! looking to have alot of fun with the family this summer.

CB
 

Biggems

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Re: Should a boat cover always be waterproof?

you may also want to invest in a new cover. Poles and or some sort of supports are a must, but the cover should also be at least water resistent.

I bought my boat cover from Walmart for 60 bucks and it works great! For "support", I use my 2 fishing poles, the folding chair, and two plastic household trashcans placed upside down. If you take a peak in your garage or around your yard, I bet you can find things to use rather than spending money on making your own or buying some. Just be creative.
 

ebry710

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Re: Should a boat cover always be waterproof?

Waterproofing that breathes. I saw a boat last spring. A gorgeous wake board boat. Bought an expensive waterproof cover, took it off after a wet winter. Black and white mildew covered everything. Took the guy weeks to bleach the mildew out.

The humidity under a waterproof cover without breathing or ventilation will grow anything.
 

cbavier

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Re: Should a boat cover always be waterproof?

It seems to me you have some choices. 1waterproof this cover or replace it with one that is waterproof and has the vents and poles made for the new one. 2Buy the vents with the poles and have a canvas shop cut and sew it into the existing canvas then waterproof your existing cover or just buy some extendable poles and put them under the cover and waterproof your existing cover. Regardless of which direction you go you must vent the cover if you don't want mold so here is a trick others on iboats have done. They use dryer hoses and run them under the cover to the outside leaving them hang down just a tad so the air can get through inside the boat. Probably two dryer hoses cut in half ran under the cover to the outside giving you four places it can vent would all that would be necessary. You just have to be careful not to collapse the dryer hoses when you tie the canvas down. Point is to allow air to enter under the edges of the cover to prevent mold.
 

ebry710

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Re: Should a boat cover always be waterproof?

Dryer hose vent tubes sound like a great idea.
 

Expidia

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Re: Should a boat cover always be waterproof?

you may also want to invest in a new cover. Poles and or some sort of supports are a must, but the cover should also be at least water resistant.

I bought my boat cover from Walmart for 60 bucks and it works great! For "support", I use my 2 fishing poles, the folding chair, and two plastic household trashcans placed upside down. If you take a peak in your garage or around your yard, I bet you can find things to use rather than spending money on making your own or buying some. Just be creative.

This post is funny because I do exactly what you do! I bought a cover from Walmart about 5 years ago and it's on my 3rd boat already.

At the end of the season I use trash cans, chairs etc whatever I can scrounge up from the garage to tent the cover.

I also put a few paper plates around the interior with drier "Bounce" sheets to keep rodents out. I screen off any openings that are left after I remove my accessories like speakers, radio etc.

I also bought some of that white plastic pipe at home depot. I cut it up and they also sell these round end caps that push on. The other end goes into a few of my empty seat post holes to further tent the cover.

But I laughed when I read your post because it reminded me at the beginning of spring I carried out my porch furniture from the garage and I was flipping out because I could not find these two chairs (I had the cushions) they are a set that goes with a matching round glass table. I was thinking who would have ever stolen my chairs? What slime bag would have borrowed my chairs and never returned them. The garage is locked too!

I went to several stores to replace them but no matches could be found. I figured stores would get more summer stuff in later in the spring, so I'll wait it out.

Two weeks later, took the boat cover off to install the accessories and "hello chairs" :)

The Wally World cover is great, but water will pool on it and it finally ripped through one of the posts over last winter, so I just patched the hole and it's still going strong. I use it every day during the season as the boat sits in the driveway. It covers my custom made trailerable cover to keep the cats off it along with bird droppings. I don't bother cleaning it because I figure the nastier it looks, the less likely thieves would think there is a decent rig underneath to rifle through.

But I agree with the other posters. Tent your cover breathable or not. If it's not breathable, buy two (more for a pontoon) of those plastic vents that sit on two poles where you cut a hole through the cover or mildew will eventually destroy everything and your boat will smell bad at the start of each season.

Mine smells like Bounce :D
 

Biggems

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Re: Should a boat cover always be waterproof?

Haha thats cool. I crack up reading these posts about guys that spent hundreds of dollars on boat cover, and then to waterproof it, and build this fancy support system to tent the cover. And all I spent was sixty bucks at walmart and used a couple of trashcans and fishing poles and it works just as good if not better than the fancy expensive rigs!

Boating can be more affordable than people think. You just need to be creative and thoughtful like you and I when it comes to things like this.
 

Span 24

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Apr 21, 2009
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Re: Should a boat cover always be waterproof?

Haha thats cool. I crack up reading these posts about guys that spent hundreds of dollars on boat cover, and then to waterproof it, and build this fancy support system to tent the cover. And all I spent was sixty bucks at walmart and used a couple of trashcans and fishing poles and it works just as good if not better than the fancy expensive rigs!

Boating can be more affordable than people think. You just need to be creative and thoughtful like you and I when it comes to things like this.

Not to mention how much more it hurts when it breaks! :mad:

Michael
 

SpeedJunkie

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Re: Should a boat cover always be waterproof?

A good idea for anyone wanting to tent your cover would be to talk to brake and muffler shops. It may cost a little more than some of the "homemade" ideas listed here but it will be pretty sturdy. Get the length of exhaust tubing you want, have it welded to a worn out rotor/brake drum with some weight to it, and then cap the top of the piping with a small piece of metal. Shouldn't cost too much if you find a shop slow enough willing to make a few bucks.
 

ebry710

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Re: Should a boat cover always be waterproof?

I still do get why you guys are worried about getting your boat wet. UV and dust I understand, but water? Is it water spots on the chrome or damage to electronic equipment?
 

scipper77

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Re: Should a boat cover always be waterproof?

I still do get why you guys are worried about getting your boat wet. UV and dust I understand, but water? Is it water spots on the chrome or damage to electronic equipment?

Water under the cover causes mildew, corrodes wires, rots wood, it's just a bad deal all the way around.
 

cbavier

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Re: Should a boat cover always be waterproof?

Water under the cover causes mildew, corrodes wires, rots wood, it's just a bad deal all the way around.

Besides I would rather be on the water enjoying my boat fishing and cruising than sitting on land cleaning and polishing.
 

ebry710

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Re: Should a boat cover always be waterproof?

Besides I would rather be on the water enjoying my boat fishing and cruising than sitting on land cleaning and polishing.

Now we're talking. Boats not afraid of water and captains on the water.
 
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