Butyl tape is applied to seal all seams.
Deck membrain for gutter.
Sloping the membrane so one end is lower than the other allows the water to flow to a downspout at the end of the joist.
Cd grade ply with minimum cca treatment and minimum 17 mm thick must be used.
A piece of material stapled on the inside of the band joist in each joist bay is also a good idea to protect the band joist from water and to direct water into the gutter.
An under deck gutter system works perfectly as long as the material captures and diverts the water correctly.
To install this system under an existing deck cut the membrane pieces with a shallower droop no more than 4 inches and staple the membrane to the underside of the joists caulking each seam as described in the following pages.
The downspouts can be oriented to fit between joists spaced 12 or 16 inches on center.
Membrane deck surfaces require a solid substrate as support.
It doesn t have to look like that.
The underdeck ceiling system can turn the ugly space under your deck into an outdoor haven that s dry bright clean and enjoyable without costly reconstruction.
Plywood is the most common type of substrate used and must meet the following guidelines.
Products installed above the joist use a rubberized membrane that drapes down between each joist bay.
Plywood substrate and timber deck joists must have a maximum moisture content of 20.
A revolutionary under deck drainage system uses a network of troughs and gutters to divert water from the deck shields the area below the deck from rain snow sun and other elements provides 100 protection of the deck substructure from moisture.
At the head of the joist bays usually at the ledger i allow for a 1 to 1 1 2 inch deep trough.
Dedication to technical excellence and premium design is what makes dec tec vinyl deck membranes an unprecedented product in the vinyl decking market.
Decking boards are then installed over the top.
What makes the underdeck ceiling so innovative is its simple and efficient system of vinyl gutters and panels which attach underneath the deck.
The trex rainescape membrane which comes in rolls is fastened loosely to the top edge of deck joists.