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WhiteCap Insul-Liner

Adding both encapsulation and insulation is no longer a hassle with the WhiteCap Insul-Liner reflective barrier.

Learn more about the WhiteCap Crawl Space System and the benefits of becoming a certified installer at

  • Reflective Barrier Insulation
  • Reflective Barrier Insulation
  • Reflective Barrier Insulation
  • Reflective Barrier Insulation
  • Indoor Gardening Thermal Barrier

Product Overview

WhiteCap Insul-Liner takes encapsulation to the next level with all the benefits of WhiteCap Reinforced Vapor Barrier Liner plus even more. It is not only a vapor barrier, but also a reflective radiant barrier and insulation that is unaffected by humidity and moisture. Insul-Liner is composed of insulating layers of aluminum foil, polyethylene backing, and closed-cell polyethylene foam, making it an all-in-one solution for heat, condensation and cold in both your basement and crawl space. Unlike standard fiberglass insulation, Insul-Liner is resistant to mold, is not harmful to your health, and does not provide nesting for rodents, bugs and birds. If you want to encapsulate the crawlspace, or grow room, and make the home or business more energy efficient, we suggest installing the dimpled drainage matting and WhiteCap reinforced plastic sheeting on the floor, and then install Insul-Liner on the walls. WhiteCap Insul-Liner will even bring the same benefits to the basement walls and grow rooms that it does in the crawl space. Compare the cost, time savings and benefits of using Insul-Liner on the walls vs. fiberglass or spray foam. You will be amazed!


  • Mold resistant
  • saves on energy
  • lower utility bills
  • protects heat transfer
  • keeps out pests


  • 4' x 175' Rolls

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Customer Reviews

Average rating for Nash Distribution is 4.98 stars of 5 stars - based on 30 reviews

I use the 20 mil vapor barrier from Nash on my crawl space projects. The product is heavy duty and the service from ordering through shipping is unbeatable!!!

Eric G. - Integrity Plus Insulation - Prentice, WI 54556

I love using your crawl space vapor barriers! They're so easy to work with!

Steven K. - Lincoln, NE 68504