Engine Box Insulation

J Clark · Post by **J Clark** » Jul 7th, '09, 20:49

The engine box insulation is falling down on the engines. When I bought the boat I knew that the previous owner installed the one inch foam insulation sheets himself. I guess the sheets were glued on with some sort of spray adhesive, they were then taped around the edges with the silver insulation tape, with no fasteners. What works best, the boat is a 31 FBC. Any help from the faithful will be appreciated.

CaptPatrick · Post by **CaptPatrick** » Jul 7th, '09, 20:54

Any horizontal, contoured, and some vertical installations of heavy sound proofing needs to be agumented with pins and clips...

BCBertie · Post by **BCBertie** » Jul 8th, '09, 01:24

Capt. Pat-

Where do you get the pins and clips? And do you epoxy the pins, or glass over them? Enquiring minds...

Cheers!

John

CaptPatrick · Post by **CaptPatrick** » Jul 8th, '09, 08:20

John,

There are several manufactures of sound deadening material and a multitude of sources that sell the products. All of them will carry the pins, (also refered to as "hangers" and "hanger kits").

Any high strength adhesive will work to secure the base to a prepared surface. The bases are perforated sheet metal and the adhesive extrudes up through the holes. Don't mash the bases down overly tight, which will squeeze out too much adhesive. After the adhesive starts to harden, tap down on the extruded material, effectively creating small rivet heads.

I've used standard thickened epoxy, fast set 5200, and, (my favorite), JB Weld. JB weld, because of the packaging, will be the most expensive way to go, but has the advantages of convenience, epoxy strength, and fast curing. Fast set 5200 or fast set 4200 has the advantage of more flexibility.

Br,

Patrick

ianupton · Post by **ianupton** » Jul 8th, '09, 09:35

When I insulated the engine box on my B25, I cut up squares of fiberglass, pushed them pin through the center of the square and wet it out in place.

Probably not the quickest route, but the fasteners are not coming loose.

Ian.

scot · Post by **scot** » Jul 8th, '09, 11:50

Capt Patrick,

do you have a recommendation on the # of hangers p/sq ft?

CaptPatrick · Post by **CaptPatrick** » Jul 8th, '09, 12:37

scot wrote:Capt Patrick,

do you have a recommendation on the # of hangers p/sq ft?

Laydown a 9" grid pattern and one spike per intersection on below horizontal material. Vertical will do with a 12" grid pattern.

J Clark · Post by **J Clark** » Jul 8th, '09, 20:40

Capt. Pat;
Thanks all for the input, I now know where to start.

bertram31.com

Engine Box Insulation

Engine Box Insulation

engine box insulation

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