FE3T Messages: 6 Registered: April 2011 Location: Norway
Esquire
Living in a country with temperatures from -30 Celsius in the winter, tp +30 Celsius in the summer, and since i have mostly been driving 20 year or older cars, i know all about moisture in the trunk.
My method are either to use waterproof fibreboard (bathroom flooring) or if using MDF to paint all surfaces. (outside and inside) with thinned PVA glue before applying any carpetry.
22mm Water resist fibreboard
carpeted and completed.
This was made to be a squeze fit in a 88 Mazda 626 Coupe (or MX6 for the US citizens)