What is it?
Drain-Plane is a fully ventilated strip designed to create an air space between the wall assembly and the cladding (siding) to promote drainage and drying of moisture to reduce the chance of mold in the assembly. It is easy to install and affordable.
What is Drain-Plane made of?
Drain-Plane is made of 100% recycled High Density Polyethylene.
How does it work?
Drain-Plane installs over the weather barrier at the stud locations. The cladding is installed over the strips creating an airspace that allows for a breathable drying effect and continuous drainage. The Drain-Plane furring strips have vertical flow chambers and cross ventilation notching for horizontal air exchange. This patent pending design is unique and promotes optimal air flow for maximum drying of the cavity. This protects the life of the structural components of the wall assembly.
Why do I need Drain-Plane?
Weather or moisture barriers are supposed to drain or shed water down and out of a building. However, this can be difficult to accomplish when siding is in direct contact to the wall because it creates a drainage block. While there are provisions in the International Residential Code (IRC) that suggest a continuous drainage plane will ensure maximum performance of the water resistive barrier, the code does not mandate the use of a furring mechanism to create an air space. Industry leaders, construction scientists and field experts do agree that the use of a furring mechanism is a “best practice” for install under cladding. Drain-Plane provides a best practice system that drains the water, assists drying, and enhances the durability of a building assembly. It is a practical and economical way of providing needed durability to a home.
How much does it cost?
The actual cost varies per application necessity or project requirement. In general, the retail cost of the material will be less than 50 cents / square foot. The cost of labor is minimal.
How is it packaged?
Drain-Plane is packaged by the box. The boxes can be packaged with quantities of 150 strips or 75 strips.
How many strips or boxes would I need per house?
An average house will require 15 strips per square (square = 100 square feet). As an example, a 2000 square foot house on average would require approximately 3 boxes of material (around 450 - 6 foot pieces). Please note: Due to the complexity of a home design the number may vary.
How do I know how many squares or square feet my house is?
The calculation for exterior wall square feet is: wall length multiplied by wall height for standard walls. To calculate squares divide the total by 100.
Example: 15ft. (length) x 10ft. (wall height) = 150s.f. of wall ÷ 100 = 1.5 squares
To Calculate gables:
Is Drain-Plane considered green?
Drain-Plane has as a green attribute the fact that it is produced from 100% recycled material. (Note: There is no such thing as a “green product.” Products have green attributes.)
How long are the strips?
Drain-Plane furring strips are produced in 6 foot lengths. Custom lengths can be produced for large orders.
How thick is it?
Drain-Plane strips are available in 4 mm (¼ inch) and 10 mm (1/2 inch) profiles. Consult local code officials for any local or regional code requirements.
How far apart are the cross ventilation slots?
Each slot is 3 inches apart.
Can I install in any climate year around?
Drain-Plane can be installed in any climate any time of the year. It does not warp in hot weather or crack in cold weather.
How do I prevent any “critters” from entering the created air space?
On the bottom we recommend the use of a wrapped screen. These are available at most hardware or building supply stores. This is an inexpensive and simple solution.
How do I terminate around doors, windows, and at the top of each wall?
Please see our Installation Instructions on our website at www.drain-plane.com/Installation.aspx for specific details. You will find this to be practical and easy to accomplish.
Under what claddings is Drain-Plane most effective?
Drain-Plane is most effective under board and shakes claddings such as wood, cement-based, metal, vinyl, and other plastic-based. It is not designed for use under cultured stone or stucco systems.
Why is vertical as well as horizontal ventilation such a good idea?
Cross ventilation is necessary to allow each cavity to breathe as a system and to promote adequate drying across the span of the building envelope. Vertical ventilating allows for the area of the strip in contact with the moisture barrier (house wrap) to properly dry.
In warmer summer conditions, when claddings undergo solar gain, the ventilation of the air space provided by Drain-Plane can provide a “cooling effect” as it provides a thermal type break between the cladding and the envelope.
Why use Drain-Plane rather than ripped (treated or marine) plywood strips?
Drain-Plane is easy to install, has a consistent dimension, and requires no special fasteners. Its unique design provides ventilation bi-directionally across the plain of the cavity as well as vertically within the strip.
A wood furring strip provides vertical but not horizontal ventilation across the plain. Wood can hold moisture which reduces the drying potential of the system. In addition, treated or marine furring strips used for longevity will require the use of stainless steel nails for proper application. These are an added expense.
Do I need a drainage plane if I live in a dry climate region?
Yes, a common misconception of people living in a dry climate region is that they are safe from moisture intrusion related issues, however the reality is that while the risk of moisture intrusion is reduced the potential for moisture entrapment still exists. Having worked with industry professionals and experts from around the country in the development of Drain-Plane we have been involved in a varying array of projects affected by moisture entrapment, including dry regions such as southern Nevada and Arizona. The question as to where the moisture comes from is difficult question to answer, because there are several natural and human created scenarios by which the moisture develops. According to the U.S. Department of Energy, Annual precipitation in these climates is less than 20 inches. Nevertheless, a brief period of heavy rain can deposit several inches of water onto a building. Improper irrigation can also be a major moisture source, leaks can cause significant damage, and indoor sources of moisture can be a problem. If water collects in an area that cannot quickly dry, deterioration of the building will occur. As a best practice for proper wall assembly construction it is recommended to consider moisture management in the design of any structure.
The ventilated rainscreen cladding system has a cooling effect when temperatures outside are high. Some of the sun's rays are reflected away from the building. Heat passing through the exterior wall panel or cladding is partially dissipated by the ventilating effect of the space between the exterior cladding panel and the structural wall. Residual heat managing to penetrate the building is reduced. This effect helps prolong the life of your cladding and paint and the structural wall assembly.
If you have more questions or would like more information sent to you please email your question or request.
Are there different thicknesses available for different requirements?
Yes, currently we have the standard ¼ inch thickness available and 10mm thick strip available to meet code where required or recommended.
Are there alternatives or competitive products I can use?
There are alternative products on the market that can do a good job of promoting adequate drying of the assembly. Certain other batten style products are available. We are not aware of any product that provides both vertical and horizontal channels. There are also “mesh style” systems that provide a good solution under stucco and stone systems. They are typically more complex and more expensive to purchase and apply.
Our research has shown Drain-Plane to be a great value when compared to other rain screen type products.
Who is G. P. Williams?
Drain-Plane was developed by G.P. Williams, a product development company created to produce innovative, problem-solving products for the construction industry. Established in 2007 G.P. Williams is a partnership of industry professionals. Together they have over 18 years of experience working in the construction industry with particular emphasis on products relating to construction defect restoration or repair. Recognizing the need for a simpler drainage plane device, G.P. Williams developed Drain-Plane. With the development of Drain-Plane, G.P.Williams has brought the reality of a simple, affordable, high quality solution to the moisture intrusion market.
Why did G.P. Williams develop Drain-Plane?
The developers of Drain-Plane, working in the exterior remodeling and moisture intrusion restoration industry, had been exposed to the alternatives to Drain-Plane for over nine years. Frustrated with the insufficient protection and quality that wood strips offered as well as the awkward installation and expense of other products, they developed Drain-Plane. Drain-Plane met their needs for high quality and superior performance while maintaining simple installation and low cost.