Framing Box Gutter

Unlike other gutters they are part of the roof structure.

Framing box gutter.

The most efficient hydraulic shape is width twice depth. 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. All domestic box gutters must be a minimum of 200mm wide and 75mm deep.

This effectively states that all box gutters must allow for 30mm of freeboard which is from the overflow point eg. 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. 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. Rainhead overflow or specific box gutter overflow must be at least 30mm below the height of the back of the box gutter.

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. The sheet metal creates a trough for the rain water to flow into the downspout. Copper gutter linings are most often built into wood framed supporting structures. Built in gutters also referred to as box gutters are considered a concealed roof drainage system.

The bottom of the frame may be pitched to provide positive drainage to the downspout. Choose a trial width of box gutter minimum width is 300mm for commercial or 200mm for domestic. They are most commonly found in older historical homes or buildings. The lining must be free to move.

The kynar resin based coatings provide protection against weathering aging and pollution on commercial industrial and residential buildings. 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. If this gives a depth of box gutter that is too deep for the roof construction try a larger width etc etc. 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.