Neutral Axis

Quality Edge InsideOut Underdeck Installation

by on Aug.22, 2013, under Uncategorized

2013-08-19 18.59.02

Main Patio

I just finished having a drainage system added to an elevated deck at my home this week, and couldn’t be happier with the look.  It’s a product called InsideOut Underdecking by Quality Edge.  QE manufactures aluminum and steel construction products like siding, soffit material, and flashings.

This product uses a system of carrier channels and perimeter trim to support aluminum alloy ceiling pans beneath a wood deck.  Rain water falls through the gaps between deck boards into the ceiling pans and drains to a gutter and downspout.

Typically, there would be a gutter at the outside edge and all panels would drain to it, then to a downspout and out into the yard.  But in my case, it made more sense to have the main patio area where the gutter is at the outside deck beam, and at the side patio, drain to a gutter mounted on the wall of the house which then connects into an existing downspout.

Side Patio

Side Patio

The installation process starts with determining the high end and low end elevations for proper drainage.  A slope of 1/8″ per foot is typical.  Perimeter trim pieces are installed on 3 sides with the gutter on the low side.  A carrier channel is installed at about 4′ spacing between the high and low points to help support longer spans.  The carrier channel has teeth that the panels snap into and seems to hold very securely.

2013-08-01 20.06.01

Carrier channel

For the section of the deck that cantilevers past the main support beam, they install V flashing which picking up any drips that fall through the deck on the opposite side of the support beam and carries that water across the top of the beam to drip into the gutter.

2013-08-03 18.55.04

V Flashing at cantilever

I should also mention that there is liberal use of silicone sealant and “window tape” to prevent leaks and drips around all the edges.  In all reality, probably more than is necessary, because at the perimeter it’s going to be wet from rain anyway.

Panels go up one by one and interlock with each other and are supported at each end, and by the carrier channels.  Unlike some systems I looked at before deciding on this one, any ceiling pan can be taken out at any time with a small tool typically used with metal siding that separates it from the panel next to it and from the carrier panels.

In all, there was a little over 500 square feet of underdeck installed.  Two workers experienced with metal siding and flashing, but who had not installed this system before, completed the job in 4 days.  Most of that time was spent in getting the perimeter trim up and doing some furring and flashing work where I have a combination of brick and siding.

Materials cost was about $5 per sq.ft. and installation about the same.  Panels and trim colors can be the same or mixed.  There are 7 solid colors and 5 wood-grain finishes.  For this job, I chose white panels to match a deck ceiling above and other soffits, with brown trim to match the stained deck structure.  From outside the deck at the street, you can’t tell anything is there.



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