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Refrigerator insulation


 

On my 362 there¡¯s a space between the hull and the refrigerator that would benefit from better insulation.
I was thinking of making a hole (or two) in the bottom of the food storage bin, located above this space, and squirting insulation foam inside this space.
I was wondering if anyone has done this, what their results were, what type of foam they used, and how much?
Thank you,

Jay
¡°Elizabeth Belle¡± #212


--
Jay Flynn
¡°Elizabeth Belle¡±
Sabre 362
1999 #212


 

Hi Jay,

I did this project last year and the results were pretty good-- not as good as I would expect after a complete rebuild with blue board, but definitely improved without destruction of the existing installation.

I used this post as a guide:



And here are photos from my project.



You'll notice that I had to dismount the stove to gain access to one side of the fridge box. Where no access was possible (the outboard and bottom sides) I drilled directly into the fridge.

After removing the foam muffins I sealed the holes (all 1/4") with putty and sanded smooth, then painted. It actually looks better now than before the painting?

Best regards,
Carter Brey
S38-II Atlantea
City Island, NY


 

Carter,? thanks for sharing, I've wanted? to do something similar for a while and was considering some type of mix & pour foam I've read about. Your and Matt's solution looks much more effective.
I'm going to add this to my project list.
Thanks?
Mike
s/v Ladylike?
88 38' MK II

PS you do some good work !

On Sat., Jan. 27, 2024, 9:32 a.m. Carter Brey, <carter.brey@...> wrote:
Hi Jay,

I did this project last year and the results were pretty good-- not as good as I would expect after a complete rebuild with blue board, but definitely improved without destruction of the existing installation.

I used this post as a guide:



And here are photos from my project.



You'll notice that I had to dismount the stove to gain access to one side of the fridge box. Where no access was possible (the outboard and bottom sides) I drilled directly into the fridge.

After removing the foam muffins I sealed the holes (all 1/4") with putty and sanded smooth, then painted. It actually looks better now than before the painting?

Best regards,
Carter Brey
S38-II Atlantea
City Island, NY


 

¿ªÔÆÌåÓý

Thank you Carter (and yes, you used more foam than I would have ever thought).?
Jay


On Jan 27, 2024, at 9:32?AM, Carter Brey <carter.brey@...> wrote:

?Hi Jay,

I did this project last year and the results were pretty good-- not as good as I would expect after a complete rebuild with blue board, but definitely improved without destruction of the existing installation.

I used this post as a guide:



And here are photos from my project.



You'll notice that I had to dismount the stove to gain access to one side of the fridge box. Where no access was possible (the outboard and bottom sides) I drilled directly into the fridge.

After removing the foam muffins I sealed the holes (all 1/4") with putty and sanded smooth, then painted. It actually looks better now than before the painting?

Best regards,
Carter Brey
S38-II Atlantea
City Island, NY


--
Jay Flynn
¡°Elizabeth Belle¡±
Sabre 362
1999 #212


 

I'm following up on this project from Jan of 2024, as I'm starting to upgrade my 35 year old refrigeration!
I've read the previous comments from Jay & Carter as well as the original from Matt. Do either of you have any insight into how thick the existing original insulation is ?
I've drilled some test holes & seem to find as much as 3 inches between the refrig shell and the hull, without much room for additional insulation. My boat is a 1988 38' MK II, so manufacturing processes will likely have changed over the course of time.
Carter, if you're still lurking around what did you find ? & how much of the insulation were you able to inject ?
Thanks and Regards?
Mike
s/v Ladylike?
88 38' MK II
Oriental NC


 

For what?it's worth, we installed a Frigoboat Keel Cooler refrigeration unit?in 2023. No alteration to the insulation of the 41-year old ice box. We set yjr temp to 40? and?it maintains a steady temperature all the time. Freezer compartment can keep ice cream!
--
Gerald (Jerry) Brecher
SIRACH 1982 Sabre 38 MkI,?
Now lying Coruna, Spain
Sailing?home to Gloucester, MA this summer
488 Pleasant Street
North Andover, MA 01845 USA
mobile: 617-510-5133


 

Mike,
?
I can't really say how thick the existing insulation was because I took an extremely conservative route. I did not remove any of the existing fiberglass fridge box beyond drilling 1/4" holes in a regular pattern to allow foam injection, adding foam to whatever was already in there (Jimmy Hoffa? Aztec gold? Who knows?)
?
All I can say is that the available space seemed to vary depending on location. I was able to inject quite a bit through the teak settee back into the forward-facing side. Working from inside into the bottom and from outside into the aft side (after removing the oven) and into the starboard side, I found it possible only to inject a small amount before it squirted back out.
?
After sealing and sanding the holes inside the box, I used Rust-Oleum white enamel to paint the inside for cosmetics.
?
https://www.dropbox.com/scl/fo/k6tew2dkr9bqxsjttmpgy/h?rlkey=t97jj4r8ljjhgqm1vfjb8jwu8&st=6lr8u30f&dl=0
?


 

Hi Carter, thanks for the info. I'm doing something similar. It'll be interesting to see, what if any, improvement there is.
Regards


Michael Sterling
Ph. 252-646-9610


On Tue, Apr 15, 2025, 12:32?PM Carter Brey via <carter.brey=[email protected]> wrote:
Mike,
?
I can't really say how thick the existing insulation was because I took an extremely conservative route. I did not remove any of the existing fiberglass fridge box beyond drilling 1/4" holes in a regular pattern to allow foam injection, adding foam to whatever was already in there (Jimmy Hoffa? Aztec gold? Who knows?)
?
All I can say is that the available space seemed to vary depending on location. I was able to inject quite a bit through the teak settee back into the forward-facing side. Working from inside into the bottom and from outside into the aft side (after removing the oven) and into the starboard side, I found it possible only to inject a small amount before it squirted back out.
?
After sealing and sanding the holes inside the box, I used Rust-Oleum white enamel to paint the inside for cosmetics.
?
?