Insulation

[TWinter]

I know there are lots of ideas and there is a search button, but instead I'm looking for a quick answer or answers..

My plane is pretty well pulled a part for the avionics upgrade. This included pulling all my panels. My mechanic is fighting some of the old yellowed insulation on the side walls. Other than complaining about the itching etc he suggested we clean up some of this old insulation. What's the opinion and best source for sidewall insulation? I see Spruce has several types..Anyone suggest one over the other or another source or idea?

 

-Tom

[Andy95W]

Just MHO, but I have always preferred the 1/2" foam from Aircraft Spruce as the best balance between price, effectiveness, and weight.

https://www.aircraftspruce.com/catalog/appages/supersoundproofsheet.php

 

[1524J]

When my interior was done they replaced the fiberglass insulation with 1/2 foam that had aluminum foil on one side. But just on the side panels. I remember something about not replacing the fiberglass insulation on the firewall for some reason.....but I'm getting old and can't remember why...... 

Also don't place nsulation over your fuel sending units. All of this might be taken with a grain of salt.....other than the foam insulation in the panels.  

[RLCarter]

I used the 1/2” Super Sound Proof with adhesive from Spruce. My old fiberglass insulation was glued to cardboard then glued to the inside of the skins, read Service Bulletins SB208A and SB208B. I would have to look on my invoice to see how much I ordered but it was 1/3 of the cost of ordering a pre-cut kit (which didn’t included the roof or hat rack area). I used poster board to make templates then laid it on the foam and cut it with a utility knife (get plenty of blades, you’ll need them). Start with the larger pieces first (you can re-use the poster board to make the smaller templates). Place the poster board behind the tubing and tape it in place just to hold it (put a mark on the poster board face), take a sharpie and place a dot on the poster board in each inside corner while holding the sharpie perpendicular to the tubing, the width of the sharpie will give you clearance needed in the above bulletin. Remove the poster board and connect the dots and cut it out, place the template on the foam (be sure the mark on the face is correct so the adhesive will be one the right side of the new foam panel). I had to trim a few pieces of my plastics due to the extra thickness of the insulation (headliner, curvature above the windows to roof and hat rack areas come to mind). There was tons of contact cement from the original insulation, most of it I left on the skins, just clean it really good with Acetone or MEK so the new stuff will stick. Fairly easy project seeing how its apart already.

[LANCECASPER]

Tom,

This is what I used on the TLS that I finished a few months back. It helps some with the sound but especially temperature as well because of the radiant barrier.

http://www.soundexproducts.com/information.html

It's not cheap - the  3/4" x 36" x 48" sheets are over $122 each but the material is super high quality and easy to work with. I ended up with 2 complete sheets left over. I think I have with shipping about $270 into it. If you want the two sheets which should do your airplane I would send it to you for $150 shipped since I know you're in the middle of a huge project.

Lance

[TWinter]

On ‎7‎/‎31‎/‎2016 at 9:45 PM, LANCECASPER said:

Tom,

This is what I used on the TLS that I finished a few months back. It helps some with the sound but especially temperature as well because of the radiant barrier.

http://www.soundexproducts.com/information.html

It's not cheap - the  3/4" x 36" x 48" sheets are over $122 each but the material is super high quality and easy to work with. I ended up with 2 complete sheets left over. I think I have with shipping about $270 into it. If you want the two sheets which should do your airplane I would send it to you for $150 shipped since I know you're in the middle of a huge project.

Lance

I ordered some, but I'll send you a PM.

 

-Tom

[1524J]

On July 29, 2016 at 10:29 PM, 1524J said:

When my interior was done they replaced the fiberglass insulation with 1/2 foam that had aluminum foil on one side. But just on the side panels. I remember something about not replacing the fiberglass insulation on the firewall for some reason.....but I'm getting old and can't remember why...... 

Also don't place nsulation over your fuel sending units. All of this might be taken with a grain of salt.....other than the foam insulation in the panels.  

An update Tom.....I wasn't losing my mind about the nsulation on the firewall or around your fuel sending units. It's in SB-208. Just reread from Clarence posting a link to SB-208 in the "corrosion" thread. And my wife tells me I can't remember anything....