Seamless Box Gutters

Box gutters earn their place in three situations. The first is design: a modern home, a board and batten farmhouse, or a standing-seam metal roof where a curved K-style face looks out of place. The second is volume: big roof planes, steep pitches and valleys that dump a lot of water into one corner during a Central Texas storm. The third is the commercial and multi-family buildings where long eaves and walkways below call for a gutter that can carry more than a residential profile.

If none of those apply, a K-style gutter usually does the job for less money, and we will tell you so on the estimate.

The main advantages of box gutters are capacity and looks. The flat bottom and tall sides hold more water than a curved profile of similar size, so the system is less likely to overflow onto beds, walks and doors and cause water damage at the slab. The squared-off shape also gives the roof edge a sharp, built-in look that homeowners with modern or farmhouse designs tend to want. The tradeoffs are cost and care: a box gutter takes more material and more hand work at the corners, and the right fall matters more because a flat bottom will hold water if it is hung level.

• Measure and size. We measure each roof section, note pitch and valleys, and size the gutter and downspouts to the amount of roof feeding each run.
• Plan the outlets. Outlets go where the water can be carried away from the foundation, walks and doors, not just where it is easiest to hang a downspout.
• Form on-site. Each run is formed from coil in one piece to its exact length.
• Hang and pitch. The gutter is fastened to the fascia with hangers spaced for its weight when full and set with a slight, steady fall toward each outlet, commonly about a quarter inch every 10 feet.
• Build the details. Corners, end caps and outlets are fitted and sealed by hand, and the downspouts are matched to the box profile.

The estimate is free, and financing is available if you would rather spread out the cost of new gutters.

Seamless aluminum is the most common choice for box gutters because it is light, does not rust, and comes in a wide range of factory colors to match trim or roof panels. For a heavier gutter on long commercial runs, or for a metal roof where you want the gutter to match the panels, steel is an option. Copper box gutters are a premium choice on custom homes. Whatever the material, every hanger and fastener is compatible with it, so dissimilar metals never touch.

Most box gutter complaints trace back to the install, not the profile. Water that sits in the gutter after a rain means the fall is wrong. Drips at the corners mean a joint was rushed. Overflow at one end of the house means too much roof is draining to one outlet. Those are the details we plan around before the first run goes up.

Box gutters do collect leaves like any open gutter, so a cleaning schedule still matters under oaks and pecans. For the upkeep side, our guide to keeping box gutters clean and flowing covers what to check each season.

How much does it cost to install a box gutter? It depends on linear footage, material, the number of corners and outlets, roof height, and whether old gutters come off first. Copper and custom fabricated pieces cost more than seamless aluminum. We give you an itemized price after measuring, and the estimate is free.

Can you replace box gutters with regular gutters? Often, yes. Older buildings sometimes have box gutters built into the roof edge, and depending on how that edge is framed, a new seamless gutter mounted on the fascia can be a simpler fix. We will look at the roof edge and tell you what fits.

Where should the downspouts go? Wherever the water can be carried well away from the slab. On clay soils around Kyle, Buda and Lockhart that matters, and some owners choose to route the downspouts into buried drain lines so the water leaves the yard instead of pooling by the foundation.