How to add foil board to a camper trailer?

[colinwalker]

I have a camper trailer that has a fridge/pantry box at the front that gets quite hot in the sun while travelling. This impacts on the fridge maintaining temperature. I was wondering if installing some foil board on the inside roof of the fridge/pantry box would help reduce the heat coming from the top of the box?

If it does then how would I go about fixing it to the roof? Can I use standard glues like no more nails or sikaflex? Prefer not to screw as it would create holes poking out the top. 

[MitchellMc]

Welcome to the Bunnings Workshop community @colinwalker. It's wonderful to have you join us, and many thanks for your question about Foilboard.

Adding insulation to your fridge/pantry box would definitely help reduce heat transfer, and Foilboard is a great option due to its low profile. You can adhere it using gutter silicone, which provides a strong bond without the need for screws. Just be sure to allow it to fully cure for a few days before placing any food back inside the box to avoid any lingering fumes affecting your items. Foilboard performs best if you first attach spacers (which can also be made from the board's offcuts) to the inside and then attach the Foilboard to them. This creates an air gap and decouples the board from the exterior surface, reducing heat transmission further. Remember to tape all Foilboard joins with Foilboard 48mm x 50m Silver Tape from the inside.

For our New Zealand members, please note that foil-based insulation products are prohibited for use in home construction.

Please let me know if you have any questions.

Mitchell
 

[colinwalker]

Thank you that is super helpful. 

[colinwalker]

actually one more question. Do I need to cover the entire inside of the box for it to work best or can I just cover the section above the fridge?

[MitchellMc]

It's best to cover the entire inside of the box @colinwalker. But if that's impossible, any areas you can cover will make a difference.

Mitchell