Framing Box Gutter

Although the copper lining conforms closely to the gutter frame profile it should not fit tightly.

Framing box gutter.

They are most commonly found in older historical homes or buildings. The sheet metal creates a trough for the rain water to flow into the downspout. This effectively states that all box gutters must allow for 30mm of freeboard which is from the overflow point eg. Built in gutters also referred to as box gutters are considered a concealed roof drainage system.

A box gutter is actually built into the bottom of the roof or into the roof overhang. The most efficient hydraulic shape is width twice depth. 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. Box gutters are composed of wood framing with a sheet metal lining normally copper stainless steel or galvanized steel.

If this gives a depth of box gutter that is too deep for the roof construction try a larger width etc etc. Copper gutter linings are most often built into wood framed supporting structures. 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. 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.

All domestic box gutters must be a minimum of 200mm wide and 75mm deep. Rainhead overflow or specific box gutter overflow must be at least 30mm below the height of the back of the box gutter. Choose a trial width of box gutter minimum width is 300mm for commercial or 200mm for domestic. Box gutters are also known as parallel gutters trough gutters or built in gutter systems.

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. The kynar resin based coatings provide protection against weathering aging and pollution on commercial industrial and residential buildings. 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.