Building codes and best practices require that downspout extensions carry water at least 6 feet from the foundation.
Downspouts that discharge at or near the foundation are a direct contributor to basement water intrusion — especially in Pittsburgh's clay-heavy soils that drain slowly and hold moisture against the foundation. We assess discharge points, extension length, and underground drainage options on every gutter visit and give you clear written recommendations if anything needs attention. Downspout repairs, extensions, and replacements are handled by our own crew and can often be completed on the same visit as gutter work.
New Downspout Installation
Downspout Extensions
Underground Downspout Drainage
Downspout Repair
When installing new gutters or replacing an aging system, we determine the optimal number and placement of downspouts based on your roof area and local rainfall intensity. Pittsburgh’s intense summer thunderstorms can dump 1–2 inches of rain per hour — your drainage system must handle that flow without overloading.
Downspout extensions — either rigid aluminum extensions or flexible roll-out extensions — direct water further from your foundation. Rigid aluminum extensions are more durable and aesthetically cleaner. We recommend extending downspouts at least 6–10 feet from the foundation on Pittsburgh’s sloped lots, where water can otherwise run back toward the house.
For homes where above-ground extensions are impractical, we install underground drainage pipes that carry downspout water to a safe outlet — a dry well, a drainage ditch, or a pop-up emitter in the yard. Underground systems are invisible, highly effective, and ideal for Pittsburgh homes where curb appeal matters.
Disconnected, dented, or clogged downspouts are among the most common gutter system problems. We reconnect separated sections, replace damaged downspout runs, and flush clogged downspouts to restore proper drainage.
Industry standards recommend one downspout for every 35 feet of gutter length and one downspout for every 600–800 square feet of roof area drained. Many Pittsburgh homes — especially older properties built in the early 20th century — were constructed with too few downspouts for modern rainfall intensities. Our team evaluates your specific roof configuration and advises on optimal downspout count and placement.
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Downspout extensions should carry water at least 6 feet from your foundation — and ideally 8–10 feet for homes on flat lots or in areas prone to basement moisture. On sloped lots, the grading may allow shorter extensions if the slope carries water away from the house naturally.
Many Pittsburgh municipalities prohibit downspout connections to the sanitary sewer due to the risk of overloading the system during storms. Some older homes have downspouts connected to storm sewers, which is generally acceptable. Always check with your local municipality before modifying downspout drainage.
Gutter guard installation is the most effective way to prevent debris from reaching and clogging your downspouts. Regular gutter cleaning (at least twice per year) also prevents debris from washing down into downspout openings. Downspout strainers (leaf catchers) installed at the top of each downspout provide additional protection. Direct water away from your foundation.
The general rule is one downspout per 20–30 linear feet of gutter, or one per 600–800 square feet of roof area draining to that run. Pittsburgh's rainfall intensity — up to 2.5 inches per hour in heavy summer storms — means undersized drainage causes overflow even from clean gutters. We calculate the correct number and placement for every system we assess.
At least 4–6 feet away from the foundation — more is better. Splash blocks, extensions, or underground pipes direct water away from the foundation. Pittsburgh's clay-heavy soils drain slowly, making proper discharge critical for preventing basement water intrusion. We assess discharge on every gutter visit.
Usually fastener failure from freeze-thaw cycles working screws loose, or ice weight in winter. Clogged downspouts that overflow freeze and add significant weight. We resecure loose downspouts and address the underlying cause — whether that's ice formation, undersized diameter, or missing straps.
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Direct water away from your foundation. Call Picture Perfect Exteriors at 412-743-8208 for a free downspout and drainage assessment in Pittsburgh, PA.
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