Roof Vapor Retarders Safeguard Against Vapor Migration and Prevent Vapor Flow
The proper installation of a vapor retarder in the roofing system safeguards against vapor migration and prevents vapor flow upward into the insulation.
Americover offers roofing vapor retarders that can withstand extreme temperatures, and are highly puncture and tear resistant. Many of the vapor retarders and vapor barriers can be customized to reduce in-field seams or manufactured with fire retardant to meet building codes.
Roof vapor retarders prevent things like the following:
- ice under the membrane
- soaked insulation facers
- destabilized insulation
- rusting roof decks
- dripping water down screw-fastener threads
- compromised fiber board and perlite integrity
- mold on organic facers
- loss of adhesion on adhered systems
Common Questions About Roof Vapor Retarders
When should I use a polyethylene vapor retarder on the roof?
There are three main occurrences when a vapor retarder should be used – building use, to control construction-generated moisture, and sequence of construction. Typically, plastic sheeting should be when the interior of a building requires conditioned air and has humidity present. The presence of control construction-generated moisture and sequence of construction after the roof is installed also requires a vapor retarder. This moisture is commonly caused by pours, combust heaters, drywall taping and painting, fireproofing, concrete-block laying, and plastering.
What characteristics make a quality vapor retarder?
Performance and perm ratings are the main factors in selecting a quality vapor retarder. The purpose of a vapor retarder is to reduce the movement of water vapor in the roofing systems. Typically, these materials must have a perm rating of 1.0 or less to be successful. Poorly constructed vapor retarders can contribute to the destabilization of insulation, rusting, dripping water, and loss of adhesion to systems.
Call us for free samples and/or Pricing on our speciality roof vapor retarders.Give Us A Call
High Quality Roof Vapor Retarders
String Reinforced Plastic Sheeting
Dura-Skrim® Reinforced Plastic Sheeting is a heavy duty construction and agricultural film excellent for both indoor and outdoor applications requiring an exceptionally strong material.
VAPORBLOCK® Vapor Retarder
VAPORBLOCK® is a high performance crawl space vapor barrier designed to retard moisture migration through concrete slabs-ongrade. VAPORBLOCK® vapor barriers exceed ASTM E-1745 Class A, B, and C requirements.
VAPORBLOCK® Plus Vapor Retarder
VaporBlock® Plus™ 20 Mil Vapor Retarder/Gas Barrier is a seven layer co-extruded barrier made from state-of-the-art polyethylene and EVOH resins to provide unmatched impact strength.
Vapor Barrier Blue
Vapor Barrier Retarders are composed of polyolefin resins to create a puncture-resistant vapor barrier for use under concrete slabs to stop moisture migration and reduce mold, mildew, and fungus.
Vapor Barrier Yellow
Vapor Barrier Retarders are composed of polyolefin resins to create a puncture-resistant vapor barrier for use under concrete slabs to stop moisture migration and reduce mold, mildew, and fungus.
Pro Crawl Barrier
Pro Crawl Barrier is a 10 mil Class 1 Vapor Barrier with a high gloss white finish offering low permeability and excellent tensile strength to protect the building fabric from moisture vapor damage. Roll size is 10′ x 100′.
HDPE and LLDPE
12 mil to 100 mil HDPE geomembranes are specially formulated to perform in applications that will have extended exposure to outdoor conditions. HDPE is custom fabricated to size and specifications.
Vapor Retarder Tapes
A continuous vapor retarder is the most effective against moisture control, but in most cases the material has to be cut to size, so using the appropriate tape to overlap seams and seal holes is very important. Americover supplies 2 Sided Butyl Tape as well as Vapor Tape for these applications.
Christmas Tree Ratchet Fasteners
Christmas Tree Ratchet Fasteners are made of heavy duty nylon and are used to attach vapor barriers to the foundation wall.
Butyl Tape
35mil thick double sided black rubber tape used to adhere overlapping panels of vapor barriers or vapor retarders together.
Vapor Tape
Heavy Duty, weather resistant, white sealing tape with a acrylic adhesive used for seaming large panels of vapor retarder.
Check out our online selection of specialty plastic building solutions. Contractors and distributors are eligible for special pricing and volume-based discounts on select products, call us at 760-237-8786. Our online inventory is just our retail selection, which means we can often source items you may not see here.Give Us A Call
Contractors and Builders Talk About Americover
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Roof Vapor Retarder Resources
Americover’s Product Catalog
Browse our full inventory of vapor barrier and crawlspace encapsulation liner products.
Guide to Selecting an Effective Vapor Barrier
Everything you need to know about choosing and installing a vapor barrier.
Crawl Space Vapor Barriers: What Mil Thickness Should I Use?
Sealing an open crawlspace with a vapor barrier will protect a home from damage. Here’s a guide to choosing the material for your crawlspace encapsulation job.
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