Intro
DuoDeck™ UnderDeck Installation Basics
Screwgun, 1/4” socket, tape measure, line level and string, circular saw or tin snips.
Contact Palram Americas @ 800-999-9459
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1.
Begin Placing DuoDeck Brackets
Review your current deck structure. Determine the desired direction for water drainage. The panels will slope from high to low with water draining at the lowest end. (Note: Depending on size of deck, you may wish to slop the panels from a center point to two drainage points.)
Beginning at the "high" end, install a DuoDeck bracket on the outside edge of the deck allowing room for the 2x2 to slide inside the bracket. Use a line level or the guidelines on the brackets themselves to install another bracket on the opposite outermost joist at the same level. (Note: When using the pre marked lines to install brackets be sure to use a line level and double check the level of the brackets to avoid issues with variances in joist dimensions.) Secure each bracket with woodtite fasteners.
Screwgun, 1/4” socket, tape measure, line level and string, circular saw or tin snips.
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2.
Install Brackets at Front of Deck on Outermost Joists
Move to the opposite or drainage end of your deck. Determine proper slope for the panels (minimum 1/4 inch per 4ft. of panel length) and install DuoDeck Brackets on outermost joists at approprite height. (Example: for a 12 ft. panel length - drainage end brackets are installed 3/4" below the "high" end brackets).
Tie taught string line (a.k.a. line level) between high and low brackets and use as a guide to complete installation of outside rows of brackets every 32" max.* (note: line levels are available at most hardware stores and home improvement centers. Most line levels are marked for various slopes on a "per foot" basis. A 1/4 inch per 4 feet slope is the equivalent of 1/16" per foot slope.)
*This can also be accomplished by calculating the number of brackets needed from front to back and dropping each successive bracket one guideline on the bracket.
Screwgun, 1/4” socket, tape measure, line level and string, circular saw or tin snips.
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3.
Install Successive Rows of Brackets
Use a taught stringline between the two outermost rows of brackets as a guide to complete the bracket installation every 24" or 32" (Do not exceed 32" spacing).
Alternately, use the pre-marked guides on the bracket to ensure each row of brackets is installed on the same level. When using this method be sure to double check that all brackets are level using a line level to avoid discrepancies caused by differences in joist dimensions.
Screwgun, 1/4” socket, tape measure, line level and string, circular saw or tin snips.
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4.
Position 2x2 Purlins and Fasten to DuoDeck Brackets
Slide 2x2’s through inside of each row of brackets. Secure with two 1" Woodtite fasteners per bracket. You’ll now see even level rows of 2x2s every 32" (or 24") which gradually step down in height for desired drainage slope.
Screwgun, 1/4” socket, tape measure, line level and string, circular saw or tin snips.
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5.
Orient and Position Panels for Installation
Before installing orient panels label side down (outermost corrugation up). Secure panels with 1” Woodtite fasteners every other corrugation where corrugation touches 2x2 purlin. Overlap panels by one corrugation. (26” panels overlap to provide 24” net coverage per panel.)
When fastening to the 2x2s, be sure not to over-tighten the Wood-Tite screws. The sealing washer should be seated firmly, but not deformed. Install the panels as described to cover the entire underside of the deck.
Screwgun, 1/4” socket, tape measure, line level and string, circular saw or tin snips.
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6.
Enjoy Your Dry Space Under Your Deck
Now you will have a dry space under your deck to enjoy as a patio, or to use as a sheltered storage area.
Screwgun, 1/4” socket, tape measure, line level and string, circular saw or tin snips.
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