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Q: What is the DEK Drain UNDERSIDE^® Economy system?

A: DEK Drain UNDERSIDE^® is a new building product designed to capture and direct water which penetrates through an elevated deck, thereby keeping the area under the deck dry!
DEK Drain UNDERSIDE^® similar to our original DEK Drain product.  However, DEK Drain UNDERSIDE^® is modified for installation on EXISTING DECKS (installed from the under-side of a deck). The complete DEK Drain UNDERSIDE^® system includes:

a. DEK Drain UNDERSIDE panels
b. DEK Drain UNDERSIDE diversion flanges
c. DEK Drain UNDERSIDE headwater flashing (for capturing and directing water which runs down the sidewall of the house and onto the deck).

Q: If DEK Drain UNDERSIDE^® is attached to the bottom edge of my deck joists, will I lose head room under my deck?

A: The panels of our DEK Drain UNDERSIDE^® system come to you along with mounting strips, usually a wooden strip measuring ½"x 1-1/2" or ¾" x 1-1/2", for ease of installation. The panels near the ledger board will hang down approximately ½" below the bottom edge of the joists. At the discharge end, the center trough of the panel will fall approximately two inches below the bottom edge of the joists.

Q: How much of the area under my deck can I keep dry with the DEK DEK Drain UNDERSIDE^® system?

A: Generally, the area best able to be covered will be the area defined by the length of run of the joists from the ledger board (usually attached to the house) to the beam. The joists normally rest on the top edge of the beams. Because DEK Drain UNDERSIDE^® is attached to the bottom edge of the joists, the terminal end of the DEK Drain UNDERSIDE^® panels will meet the beam approximately two inches below the top edge of the beam. A gutter system is usually mounted to the inside face of the beam to collect the water discharging from the panels.

Q: Is it difficult to install the DEK Drain UNDERSIDE^® system? Can I do it myself or must I hire a contractor?

A: Our DEK Drain UNDERSIDE^® system has been designed for fast and easy installation by either the homeowner or a professional contractor.  Complete installation instructions are included in each shipment.

The drain panels are pre-cut and self-forming. Simply line up the edges of the panels with the outside edge of the joists and staple in place. A compression flange completes the installation and pulls the system tightly together.

Q: What is the cost of the DEK Drain UNDERSIDE^® system?

A: Our DEK Drain UNDERSIDE^® system sells for $3.99/sf for 16" o.c. framing. The sf (square foot) figure is derived by multiplying the length and width of the area to be covered. Thus, if the area to be covered is 10' by 20', this would be 200 sf. Multiplied by the cost of $3.99/sf, this DEK Drain UNDERSIDE® system would sell for $798.00. Taxes (where applicable) and shipping charges are extra. For framing 12" o.c., the DEK Drain UNDERSIDE® system sells for $4.49/sf.

Q: What makes DEK Drain better than a competing product?

A: DEK Drain was developed to be user friendly and to endure. There are a few other products on the market which profess to keep the area under your deck dry. DEK Drain installs quickly and easily without the use of any caulk, adhesive, glue or solvent of any sort. DEK Drain can be installed in any weather, including wet or below-freezing weather. Another of the many advantages of the DEK Drain system is the lack of joints. We fabricate panels up to 24' in length with no breaks or joints in the run of the panels. All during our trials, whenever we experimented with a joint detail, the panels would leak. DEK Drain HAS NO JOINTS! Competing products either require one or more joints or simply limit your choice to one finite length with no allowance for increasing the length of run. Further, most competing products are available in limited parts of the United States only and are priced much higher than the DEK Drain system. Additionally, they are more difficult to install. Some require that only their own contractors may do the installation.

HOW TO ORDER DEK Drain

Ordering DEK Drain is easy!

There are only four dimensions needed to place your order. You need to know:

1. The length of the ledger board for calculating the amount of headwater flashing needed to flash your job. If there is more than one run (such as where the deck meets the house at more than one contact point) we would need to know that. A simple sketch of the deck layout with dimensions is helpful. Please indicate the location of the house on the drawing and the direction in which the joists are oriented.
2. The number of bays in the deck. A bay is the area between 2 joists.
   For 16" o.c. framing, the bay will measure 14-1/2" inside to inside.
   For 12" o.c. framing, the bay will measure 10-1/2" inside to inside.
3. The length of the joists in each bay rounded to the nearest foot (round UP only). If one joist is longer than the other due to the shape of the deck, take the measurement from the longer joist.
4. Indicate if the framing of your deck is 12" on center,16" or 24" on center.
5. If your deck is unusual and doesn't fit into the above categories, please fax a simple drawing of your deck (it doesn't need to be to scale) along with your information to our toll free fax number 1-888-819-3232. We will get back to you with a written proposal for your system.

Once we have the information as described above, we will put together the materials necessary to complete your individual job. We will ship the materials to you already pre-cut, sized and ready for your speedy installation!