pro clima SOLITEX MENTO 3000 is a medium-weight, vapour-permeable underlay with moisture regulation for the outside of your timber frame structure. The pore-free TEEE membrane actively transports moisture to the outside, while the membrane provides maximum protection against driving rain, wind and hail. With 4 months of full weather resistance and a non-slip surface, you stay flexible in your planning, even in winter and in the rain.