The sheet metal creates a trough for the rain water to flow into the downspout.
Framing box gutter.
The lining must be free to move.
Most box gutters consist of wood framing covered by a thin sheet metal lining made out of galvanized steel stainless steel copper or another metal that will not easily corrode.
A box gutter does not hang onto the edge of a roof or on the edge or side of a house as many modern pre formed metal gutters do.
Copper gutter linings are most often built into wood framed supporting structures.
Gutter galv 24g 6 commercial box gutter kynar finish 10 feet our most popular 6 commercial profile box gutter fabricated from 24 gauge kynar 500 steel.
The foundation of most box gutters is wood that is then covered with thin sheet metal such as tin copper lead stainless steel or some other metal that will not readily corrode.
The bottom of the frame may be pitched to provide positive drainage to the downspout.
Since they are not readily visible they typically don t alter the historic character of buildings and don t detract from or conceal decorative cornice details.
The most efficient hydraulic shape is width twice depth.
Choose a trial width of box gutter minimum width is 300mm for commercial or 200mm for domestic.
This effectively states that all box gutters must allow for 30mm of freeboard which is from the overflow point eg.
Box gutters are also known as parallel gutters trough gutters or built in gutter systems.
Although the copper lining conforms closely to the gutter frame profile it should not fit tightly.
They are most commonly found in older historical homes or buildings.
The kynar resin based coatings provide protection against weathering aging and pollution on commercial industrial and residential buildings.
If this gives a depth of box gutter that is too deep for the roof construction try a larger width etc etc.
The box is built by an experienced carpenter into the roof overhang or into the bottom of the roof then lined with the sheet metal.
Built in gutters also referred to as box gutters are considered a concealed roof drainage system.
All domestic box gutters must be a minimum of 200mm wide and 75mm deep.
Box gutters are composed of wood framing with a sheet metal lining normally copper stainless steel or galvanized steel.
