We have a 1977 Islander 32MkII. Nice sailing boat, in great shape. Original Atomic 4 was replaced with a Westerbeke 2 cylinder 18hp diesel, just prior to our acquiring boat. Engine noise is a real nuisance. the Engine is installed in the traditional location, under cockpit, with access through companionway ladder and from cockpit locker port side. Does anyone have useful suggestions regarding installing noise insulation material? the main problem I see is that engine is not surrounded by bulkheads or cabinetry except on one side and front, the port side and rear of engine and transmission are open and exposed. Good for maintenance, lousy for sound deadening. I am considering buolding a light framework to surround it with noise deadening panels of some type. Any suggestions?
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Noise barrier.
George: There are all different types of products on the market. The good stuff has a lead shield in it. I believe that Practical Sailor had a review of these materials several years ago. Some of the stuff has an adhesive back or can be stapled to a surface. Just depends on how much money you want to spend as to how much sound deading you're going to get. Even with this insulation, you are not going to get rid of some of the noise that is going to be transmitted through the stringers and into the hull. Check out the W/M catalog, they have some noise reduction material.
George: There are all different types of products on the market. The good stuff has a lead shield in it. I believe that Practical Sailor had a review of these materials several years ago. Some of the stuff has an adhesive back or can be stapled to a surface. Just depends on how much money you want to spend as to how much sound deading you're going to get. Even with this insulation, you are not going to get rid of some of the noise that is going to be transmitted through the stringers and into the hull. Check out the W/M catalog, they have some noise reduction material.
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David
Noise
George, I think your idea of a sound deadening framework is good. You may want to contact Soundown in Marblehead, MA. They are a major producer of this type of material.
George, I think your idea of a sound deadening framework is good. You may want to contact Soundown in Marblehead, MA. They are a major producer of this type of material.
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Don Evans
Sound Proofing
Your on the right track with regards to building an engine box, then insulating with quality sound deadening material. I'd recommend Soundown, lead/foam composite (there on the web/www.soundown.com). Very costly (4X8 sheet/1" thick cost me about $500) but very effective. Comes in various thicknesses. I added to my engine box. Stuff uses spray contact cement. One of my better upgrades as the one lunger diesel in the box behaved like a drum...thunka...thunka...thunka, very loudly. I took the decible value way down to tolerable levels. Also remember to add some air through power or static vents if you seal up the engine box real tight. Diesels need lots of air. You will appreciate the peace. Cheers. Don
Your on the right track with regards to building an engine box, then insulating with quality sound deadening material. I'd recommend Soundown, lead/foam composite (there on the web/www.soundown.com). Very costly (4X8 sheet/1" thick cost me about $500) but very effective. Comes in various thicknesses. I added to my engine box. Stuff uses spray contact cement. One of my better upgrades as the one lunger diesel in the box behaved like a drum...thunka...thunka...thunka, very loudly. I took the decible value way down to tolerable levels. Also remember to add some air through power or static vents if you seal up the engine box real tight. Diesels need lots of air. You will appreciate the peace. Cheers. Don
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Joe Barrett
1 1/2" Foam
I installed 1 1/2" foam/aluminum insulation from defender and cost for two kits was $100. reduced sound by 50%. Cost of installation was $130 so total cost for project was $230
I installed 1 1/2" foam/aluminum insulation from defender and cost for two kits was $100. reduced sound by 50%. Cost of installation was $130 so total cost for project was $230
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Bob
Sound Proofing
check out www.soundown.com for products and installation guides. i redid my engine box and there is a difference. the trick to soundproofing is complete coverage. in other words, if someone thoroughly sound proofed a room and left the window open the material in the rest of the room will not help much.
check out www.soundown.com for products and installation guides. i redid my engine box and there is a difference. the trick to soundproofing is complete coverage. in other words, if someone thoroughly sound proofed a room and left the window open the material in the rest of the room will not help much.
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Jack Tyler
Soundown experience
We recently installed 2" Soundown insulation on multiple sides of a Westerbeke 60 4-cylinder diesel. They specifically coached me to purchase the vinyl vs. lead lined product because it was cheaper, lighter and had no less db attentuation. Unlike Don, this installation was done with 1 4x8' panel and the cost was slightly over $200. I would not recommend adhesive products as the heat will work on them relentlessly. Instead, consider using suitably long s/s self-tapping fasteners and fender washers. These panels have now been in use 1.5 years of hard cruising with regular engine time, look new and adhere as well as the day I installed them. Soundown can give you some good coaching on installation techniques, too. Jack
We recently installed 2" Soundown insulation on multiple sides of a Westerbeke 60 4-cylinder diesel. They specifically coached me to purchase the vinyl vs. lead lined product because it was cheaper, lighter and had no less db attentuation. Unlike Don, this installation was done with 1 4x8' panel and the cost was slightly over $200. I would not recommend adhesive products as the heat will work on them relentlessly. Instead, consider using suitably long s/s self-tapping fasteners and fender washers. These panels have now been in use 1.5 years of hard cruising with regular engine time, look new and adhere as well as the day I installed them. Soundown can give you some good coaching on installation techniques, too. Jack
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