foam in a capri

[dreed440]

ok so i got a 85 bayliner capri 1950. im wondering why there is foam up under the lip of the hull plus i removed the wood around the engine and there was foam on both side of were the rear seats were up next to the hull so would like to know what the foam was there for and should i replace it when i put new wood back in also if so what should i use it just looked like factory spay in foam.

 

[jbcurt00]

Re: foam in a capri

ok so i got a 85 bayliner capri 1950. im wondering why there is foam up under the lip of the hull

USCG reg flotation foam, structural rigidity of the hull

i removed the wood around the engine and there was foam on both side of were the rear seats were up next to the hull so would like to know what the foam was there for

Same as above, plus if near the engine compartment of an I/O motor, sound deadening

and should i replace it when i put new wood back in

It is advisable to replace all the foam you remove, flotation & the additional structure it provides reinforcing the strength of the glass hull

also if so what should i use it just looked like factory spay in foam

The 'spray' in foam used by the factory to build your boat, is NOT the same canned spray foam available to you, anywhere. 2 part pour in foam is your best alternative, it is available from many vendors, here is 1.

US Composites is often the low cost, best service vendor for the glassing supplies you'll likely need as well. But that is all fairly far down the road from here. Spend some time reading thru some of the threads on the Boat Restoration, Building, and Hull Repair forum's homepage. Search for WoodOnGlass, oops, friscoboater threads on the work they've posted. They are all invaluable resources. oops hull extension thread has an index on page 1 to help locate info quickly in his HUGE thread. Friscoboater has lots of great info in both of his threads, a YouTube channel & blog that are also excellent resources. WoodOnGlass has extremely helpful diagrams of how to put back stringers, deck & transoms. Don S's how to's are also a good place to find info. Frisco & oops are both in that list of tips.

There is lots of good info around, look thru some threads & do some reading. You will find lots of info & many answers to questions you are not yet aware that need to be asked.

In fact, at the bottom of your thread, there are 5 threads the iBoats server lists as similar to yours:

• spray foam versus pour in foam?
  
  By sabbath20 in forum Boat Restoration, Building, and Hull Repair
  
  Replies: 4 Last Post: May 18th, 2012, 03:18 AM
• Computer Packing Foam for Foam Replacement?
  
  By nhangler in forum Boat Restoration, Building, and Hull Repair
  
  Replies: 26 Last Post: May 31st, 2011, 12:50 AM
• 1988 bayliner capri 15 footer deck and foam replacement
  
  By Eaglewings05 in forum Boat Restoration, Building, and Hull Repair
  
  Replies: 27 Last Post: April 25th, 2011, 11:11 PM
• Bayliner Capri new foam dilemma
  
  By petermarcus in forum Boat Restoration, Building, and Hull Repair
  
  Replies: 10 Last Post: August 9th, 2010, 08:54 PM
• replacing foam... yet another foam question...
  
  By wca_tim in forum Boat Restoration, Building, and Hull Repair
  
  Replies: 3 Last Post: February 8th, 2008, 03:08 PM

Scan thru them, you may find useful info in them as well.

Best of luck, and start reading. You will have some work ahead. A through inspection of the hull, deck, stringers & transom are all recommended prior to beginning reconstruction. Some of that inspection may involve opening holes in the deck & bilge, as well as some test holes getting drilled in the transom.

If I am not mistaken, this vintage of Bayliner was not known for exceptional attention to detail, nor close quality control, at the factory. So don't be surprised when you find some unexpected problem areas. They can all be fixed, and the crew here will gladly help.

By the way, you can not post too many pix or too many details about the areas in the pix. Use a photobucket account & paste the codes, it will give you pix like this:
[IMG]http://i1246.photobucket.com/albums/gg618/jbcurt00/other%20people%20boats%20or%20pix%20info/pic1124-5.jpg

Welcome to the dry dock

 

[ondarvr]

Re: foam in a capri

The location of the foam is for a couple of reasons

It's under the lip up high because the boat is required to float upright and level. If there is too much foam under the floor it will be unstable and want to roll when swamped. The additional foam near the stern is to compensate for the added weight of the engine and outdrive being mounted there, again it needs to float level.

Sound deadening and strength (stiffening) are sort of side affects, it's a low cost way to stiffen panels so less glass or other more costly items need to be used. The problem with using this type of foam for strength is that it breaks down over time and as it does it also absorbs water.

Boats are typically over built, the problem is frequently even when an item made from fiberglass is strong enough to hold up to the stresses it may see, it may still flex. This flex may be perceived by the potential buyer or owner as the product being weak, so they stiffen these areas with foam, frequently in a way that adds little or no strength, just some stiffness.

In some boats as the foam breaks down they become flexy fliers and feel odd, they normally still work OK, but by this time the wood is rotten also, so it compounds the problem.

There are pros and cons to foam, but I have it in all my boats.

 

[93bayliner1800]

Re: foam in a capri

Man, why do I now worry I do not have enough foam!!! Lol. I boat on lakes and you can always see land...so I think I will put a small buoy in the front and attach to the boat....so I can say....see that buoy?? My boat is 30ft below it!