Engine room fresh air collection Box

Hi Everyone, Been a long time.

I need to approach a project from a angle I've never used before. I need to build custom collection boxes to glass to the inside of my hull.
I want to use a easy to cut and shape core material and only glass in roughly as it will never be seen.
I'd like to keep it thin like 3/8" up to a 1/2" waterproof, easy to glass
so the plan is to either cut or score the material to form a rectangle then glass into rigid shape then add two 4" hose nipples ( for the blower hose to attach to) and a 5/8" hose nipple to provide drainage of sea spray that get in there.
I can always use a plywood but thought a core material might be faster, cheaper and lighter. Whilst offering some sound deadening.

So what material would be best suited for this type of build

P.S. This box would have one open side and get tabbed into the hull.

Thanks for reading
Grady

 

You might use a plastic dishwash tub as a mold to lay up some fiberglass in and make fiberglass boxes or somehow just use the plastic tubs themselves for the boxes.
14" x 13" x 5" Plastic White Storage Box https://www.webstaurantstore.com/14-x-13-x-5-plastic-white-storage-box/407PLMB.html?utm_source=Google&utm_medium=cpc&utm_campaign=GoogleShopping&gclid=EAIaIQobChMI_aextLv_2wIVD1mGCh2qLg2jEAQYAiABEgIOPPD_BwE

 

Thx Sam.......but I'm looking for a sandwich like layup. With some sound deadening properties.

Great idea though

 

Nidacore, plascore or carbon core (whatever you call it by) could be one option. However although the plastic honeycomb makers promote sound deadening properties I’m not sure how much. I mostly use it for weight savings. If sound is the priority issue you could do a light solid glass layup and look at some sound down solutions.

Soundown (Sound Down, sound down, sounddown) - The Woldwide Leader in Noise Control Engineering http://www.soundown.com/index_Marine.htm

 

Thank you Sparky, I have some soundowner scraps and do plan on using them.