Questions to Ask an Exterior Contractor About Eavestroughs

Eavestroughs — also called gutters — do one job: collect water from the roof and direct it away from your foundation. When they’re working properly, you never think about them. When they’re not — blocked, sagging, pulling from the fascia, or undersized for the roof area — water pools against your foundation, infiltrates your basement, damages your soffit and fascia, and erodes your landscaping.

Eavestrough installation looks simple. It isn’t. The slope, the sizing, the downspout placement, and the quality of the product all determine whether the system works as designed.

“The most common eavestrough mistake I see isn’t the installation itself — it’s the system design. Undersized gutters on a large roof area, downspouts that discharge too close to the foundation, no thought given to where the water goes when it leaves the system. A good eavestrough contractor talks about water management, not just gutter installation. If all they’re thinking about is the gutter, they’re not thinking far enough.”

— Dritan @ TD Roofing Inc., exterior contracting specialist and drainage consultant with 13 years of experience in residential eavestrough design and installation across the Southern your region

Questions About the Product

Are these seamless or sectional eavestroughs?

This is the first and most important product question.

Sectional eavestroughs come in pre-cut lengths joined together with connectors. Every joint is a potential leak point. They’re less expensive but require more maintenance and are more prone to leaking over time.

Seamless eavestroughs are fabricated on-site from a continuous roll of aluminum, custom-cut to the exact length of each run. The only joints are at corners and downspout connections — dramatically fewer leak points. Seamless aluminum is the current standard for quality residential eavestrough installation.

Ask specifically: are these seamless or sectional? If sectional, why?

What a good answer looks like: Seamless aluminum specified as standard, fabricated on-site to fit your home.

What gauge aluminum is being used?

Eavestrough aluminum comes in different gauges (thicknesses). Standard residential is typically 0.027″ gauge. Premium is 0.032″. The heavier gauge resists denting, holds its shape better under snow and ice loads, and lasts significantly longer. Ask specifically what gauge is being installed and whether a heavier option is available.

What a good answer looks like: A specific gauge stated in the quote, with a clear explanation of the quality difference if an upgrade is available.

What profile size is being recommended, and why?

Eavestroughs come in different widths — 4-inch, 5-inch, and 6-inch are the most common residential profiles. The right size depends on the roof area draining into each section and the average rainfall intensity in your region. In most of your country, 5-inch is the standard minimum; a larger roof or complex roofline may warrant 6-inch.

Ask the contractor what size they’re recommending and whether it’s appropriate for your roof’s drainage area.

What a good answer looks like: A specific size with a rationale tied to the roof area and local conditions — not just “the standard size.”

Questions About the System Design

How many downspouts, and where?

Downspout placement is a design decision that significantly affects system performance. A general rule is one downspout for every 40 linear feet of eavestrough, but the right number depends on the roof pitch, the area being drained, and where discharge can best be directed. Ask how many downspouts are planned, where they’ll be located, and why.

What a good answer looks like: A specific downspout plan with locations tied to the drainage requirements and the site, not just the convenience of the crew.

Where will downspouts discharge?

Water that dumps at the foundation is worse than no eavestrough at all. Ask specifically where each downspout will discharge. Options include: splash blocks that direct water away from the foundation, underground drainage connections to a storm sewer or dry well, or extensions that carry water several feet from the building before discharge.

What a good answer looks like: A clear discharge plan that directs water a minimum of 4–6 feet from the foundation, with specific solutions for each downspout location.

What is the planned slope?

Eavestroughs must slope toward downspouts to drain properly — typically a drop of 1/4 inch per 10 feet of run. Too little slope causes pooling and overflow. Too much looks visually odd and may cause water to shoot past the downspout opening. Ask whether the slope is being designed into the installation plan, not just eyeballed on site.

What a good answer looks like: A specific slope target and a description of how it will be measured and set during installation.

Questions About Gutter Guards

Are gutter guards worth it for my situation?

Gutter guards — screens, micro-mesh covers, or surface tension systems installed over the eavestrough opening — reduce the frequency of cleaning by blocking debris. Ask the contractor whether they’re appropriate for your situation: the type and volume of trees near your home, the pitch of your roof, and the specific guard system being recommended.

Be cautious of high-pressure sales tactics around gutter guards — they are a high-margin add-on and are often upsold aggressively. A good contractor will tell you honestly whether your situation warrants them.

What a good answer looks like: An honest assessment of whether guards make sense for your specific property, with a specific product recommendation if they do.

Questions About the Existing System

Is the fascia in good enough condition to support new eavestroughs?

New eavestroughs installed on rotted fascia will pull away within a year. Ask the contractor to assess the fascia condition before installing. If the fascia needs replacement, that work should be done first. For more on fascia: Questions to Ask an Exterior Contractor About Soffit and Fascia

Are the existing hangers being replaced?

If eavestroughs are being replaced, the existing spike-and-ferrule hangers (common on older homes) should be replaced with hidden screw-in hangers — far more durable and resistant to pulling out. Ask whether new hangers are included in the quote.

What a good answer looks like: New hidden screw-in hangers specified as standard, at appropriate spacing (typically every 24 inches).

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