Questions to Ask a Gutter Installer
Three gutter bids are rarely for the same job: one is 5 inch, one is 6 inch, and one leaves out the downspout extensions. These 59 questions to ask about gutters follow the order the decision goes: the company, what the visit found, size, material and guards, hanging and drainage, price and contract, then the day of the job and the warranty. They are the questions to ask when installing gutters on a house that has none, and they work the same way when replacing ones that overflow, sag or leak.
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The questions
Each question, and why to ask it
The company
How long have you been installing gutters in this area, and is gutter work your main business or a sideline?
Why ask it
A roofer or general contractor who also offers gutters may fit them in between other jobs or pass them to another crew, which is worth knowing before you compare prices. A crew that runs a gutter machine every day knows how your local roof styles and rainfall behave.
Can you send me your license number and a certificate of insurance before we schedule anything?
Why ask it
Whether a gutter company needs a license at all depends on your state or city, so ask what applies where you live and look the number up yourself. On insurance, ask for general liability and for how the crew is covered if someone falls, since workers' compensation rules for small outfits differ by state and the whole job is done from ladders.
Who will hang the gutters on my house: your own employees or a subcontracted crew?
Why ask it
The person who measures and prices is often not the person on the ladder. Either arrangement can work, but you want the name of the crew lead and to know that the insurance you were shown covers the people who turn up.
Do you own your gutter machine, and which sizes and profiles can it run?
Why ask it
A company with only a 5 inch machine has a reason to tell you 5 inch is plenty. If a bigger size or half-round would be brought in from someone else, ask who forms it and who stands behind it.
Can you show me close-up photos of corners, end caps and downspout outlets from recent jobs?
Why ask it
From the street every new gutter looks the same. The corners and outlets are where you can see whether a crew cuts cleanly and seals neatly, and an installer proud of the work usually has those pictures on a phone.
Do you also repair, rehang and clean gutters, or only sell new ones?
Why ask it
A company that does repairs can honestly offer you one, and it is the company you would call later to reseal a corner. An outfit that only installs has one answer to every gutter problem.
Can I talk to two customers whose gutters you put up at least three years ago, and has either called you back for a repair?
Why ask it
Last month's customers cannot tell you whether the seams held through two winters. Older ones can say how the work aged and whether the company picked up the phone after the check cleared.
The visit
Will you measure the roof in person, or are you quoting from satellite imagery?
Why ask it
Aerial measuring software gives footage, but it cannot show the condition of the fascia, what the old gutter is fastened to or where the water goes once it reaches the ground. A quote produced without anyone standing at the corner of your house tends to grow once the crew arrives.
Do these gutters need replacing, or would resealing, rehanging or repitching fix what is wrong?
Why ask it
Put it plainly, because the person answering earns more from new gutter. A leaking corner, a loose hanger or a run that holds water can often be repaired, while metal that is cracked, rusted through or creased along its length generally cannot.
What is causing the overflow at this spot: a clog, the pitch, the gutter size or the downspout?
Why ask it
Each cause has a different fix and a different price, and new gutter hung the same way will overflow in the same place. Show them your video from a hard rain and expect an explanation of that one corner.
Did you check the fascia and soffit behind the gutters, and what shape is the wood in?
Why ask it
The gutter is only as secure as the board it is screwed to. Look for someone who pressed on the wood, noticed peeling paint or staining under the old gutter, and can name the stretches that worry them.
Is there drip edge above the gutter line and kickout flashing where a roof edge runs into a wall, and can you add what is missing?
Why ask it
Without drip edge, water can curl back behind the gutter and wet the fascia, and without a kickout where a roof edge dies into a wall, it can run down behind the siding. An installer who spots these is looking at the whole water path, not just the metal.
Does every roof edge on this house need a gutter, or would you leave some stretches bare?
Why ask it
Sloped gable edges shed very little water and are normally left alone, while a short eave over a door or a deck may deserve a run of its own. The answer shows whether they are selling footage or thinking about where water lands.
Is anything about this roof going to make the job harder: a steep pitch, a metal or tile roof, angled fascia or none at all?
Why ask it
Gutters hang easily from a flat vertical fascia board. Angled or missing fascia calls for wedges or straps fixed to the roof, and metal and tile roofs can send water further out past the edge, so each of these should change what is quoted.
The roof may need replacing in a few years. Should the gutters wait until that is done?
Why ask it
A tear-off can dent or loosen new gutters, and the drip edge above them goes on with the roof. When both jobs are close, the usual order is roof first, and a fair installer says so even though it delays the sale.
Which part of this house will be hardest to get right, and what would you do there if it were your own?
Why ask it
Someone who has hung a lot of gutter can usually point at one spot: a valley over the front door, a short fascia, a corner with nowhere to put a downspout. That spot is where trouble would show first, and the answer sometimes surfaces an upgrade worth paying for.
Size and material
Are you forming seamless gutter on site with a machine, or installing sectional lengths from a supply house?
Why ask it
On site roll forming means one continuous piece per run, so the only joints are at corners and end caps. Sectional gutter in 10 foot pieces costs less up front, and each extra seam is another place a leak can start.
Is this quote for 5 inch or 6 inch gutter, and which profile: K-style or half-round?
Why ask it
Size and profile change both the price and how much water the gutter can carry, and they are sometimes missing from the paperwork. If one company quoted 5 inch and another 6 inch, you are not comparing prices at all.
How did you size the gutter and downspouts for the roof area and pitch on this house?
Why ask it
A good installer will talk about the square footage of roof draining into each run and how steep planes dump water faster. Someone who just says the standard size is fine may not have looked at your largest roof plane.
Should the gutter under a roof valley be wider, or get a splash guard at the corner?
Why ask it
A valley gathers water from two roof planes and fires it at one inside corner, where it tends to shoot over the front lip. A small metal splash guard at that corner is a cheap fix, and it belongs on the quote instead of being improvised on the day.
What metal and thickness is the coil you use, and how does it hold up to a leaned ladder or a load of ice?
Why ask it
In the US, aluminum coil is commonly sold in .027 and a thicker .032, and the difference shows up in dents, rippling and how the gutter carries ice. Ask to hold an offcut of each, because the stiffness is obvious in the hand.
Is aluminum the right choice for this house, or is there a case for steel, copper or vinyl?
Why ask it
Aluminum is the usual choice because it does not rust and can be formed on site. Steel is stiffer but can rust where its coating is cut, copper costs far more and is soldered at the joints, and vinyl comes only in sections, so ask which trade-off fits your climate and budget.
Can I see the coil colors against my trim, and will the downspouts match the gutter or the wall?
Why ask it
A chip on a color card reads differently beside your own paint in daylight. Downspouts are often chosen to match the wall they run down so that they disappear, and the installer should ask you instead of assuming.
If gutter guards are in the quote, which style are they, and does anything slide under the shingles?
Why ask it
Guards range from cheap foam inserts to micro mesh systems, and some attach by lifting the first shingle course, which can affect your roof warranty. Ask what happens to the guard warranty if the mesh clogs with pollen or pine needles.
With the trees around this house, do I need guards at all, or is cleaning twice a year the better deal?
Why ask it
Guards can add a great deal to the price, so put this as an open question and see whether the installer is willing to say no. A house with nothing overhead may never earn the cost back, and one under pines may need a finer mesh than the standard offer.
How do the guards get cleaned, and can a section come off if the gutter underneath clogs?
Why ask it
No guard is maintenance free: fine debris sits on top and shingle grit washes through. One fixed so tightly that only the installer can remove it turns a ten minute job into a service call.
Hanging and drainage
What hanger system will you use, and at what spacing?
Why ask it
Hidden hangers screwed into the fascia about every 24 inches, and closer where snow is heavy, are what keep a gutter from sagging. If they mention spikes and ferrules on a new install, they are working from an older method that tends to back out of the wood.
What do the hanger screws go into: the fascia board alone, or the rafter tails behind it?
Why ask it
A screw holds only as well as the wood around it, and a thin or aluminum-wrapped fascia can hide soft spots. Where a gutter carries snow or a long span of water, reaching the rafter tails gives the hangers something solid.
Do we get enough snow and ice here to change how you hang them?
Why ask it
In snow country a gutter set high can be torn off by a sliding sheet of ice, so crews there mount it lower on the fascia and tighten the hanger spacing. Where winters are mild, expect a quick no and move on.
How much pitch will you set, and how will you keep it from looking crooked along the long front run?
Why ask it
Gutter needs a slight fall toward the outlet, roughly a quarter inch per 10 feet, or water sits and breeds mosquitoes. Experienced crews explain how they split a long run or hide the drop against the shingle line.
How do you allow for the metal expanding and shrinking on a long run?
Why ask it
Gutter grows in summer heat and pulls back in winter, and a long piece pinned hard at both ends can buckle or open its end caps. Ask at what length they add an expansion joint or break the run, and how that joint is kept from leaking.
Will the corners be hand-mitered on site or made with preformed strip or box miters, and what goes in the joints?
Why ask it
Corners and end caps are the usual places a gutter starts to drip. A box miter is a separate corner piece with a seam on each side, while a strip or hand-cut miter joins the two runs directly, and whichever is used, the sealant should be one made for gutters and not general purpose silicone.
How do you cut the holes for the downspouts and fit the outlets?
Why ask it
The neat method is a punched or sawn opening with a flanged outlet riveted in and sealed. A star cut with the tabs bent down into the downspout is faster, narrows the opening and catches every leaf that passes.
How many downspouts are you planning, what size are they, and exactly where will each one land?
Why ask it
Downspout count and placement decide whether the gutter drains or overflows, and 3x4 outlets carry roughly twice what 2x3 outlets do. Walk the perimeter with them so nothing ends up in front of a window or in the middle of a walkway.
Where will the upper roof's downspout empty: onto the lower roof, into the lower gutter, or down to the ground?
Why ask it
A downspout that dumps on lower shingles wears a stripe in them and loads the lower gutter with two roofs' worth of water. Carrying it across into the lower gutter, or straight down a wall, takes more pipe and should be drawn on the quote.
How will the downspouts be fixed to the wall, and what do you use on brick, stucco or vinyl siding?
Why ask it
Each wall needs its own fastener: anchors in masonry, sealed holes in stucco, and on vinyl a screw that reaches the sheathing without pinching siding that has to move. Count the straps too, since a tall downspout held in two places rattles in wind.
Where does the water go after it leaves the downspout, and are extensions or buried drains in this price?
Why ask it
New gutters that empty beside the foundation only move the water problem from the eave to the base of the wall. Find out whether splash blocks, hinged extensions or a tie-in to underground pipe is included or excluded.
If a downspout ties into an underground pipe, will you check that the pipe is clear first?
Why ask it
Old buried lines are often crushed or packed with roots, and a blocked one backs water up the downspout and out at the seams. A hose run into the pipe for a few minutes settles it, and a cleanout or leaf trap at the bottom makes the next blockage easy to reach.
Can one downspout feed a rain barrel or a rain chain, and what would you change to make that work?
Why ask it
A barrel needs a diverter at the right height and somewhere for the overflow to go once it is full. Rules on collecting rainwater differ from place to place, so check what your area allows before the downspout is cut.
Price and contract
What is specifically included and excluded in the written price, and what is the payment schedule?
Why ask it
You want linear feet, sizes, downspout count, colors, permits, disposal and any fascia work on paper before you sign. A modest deposit with the balance on completion is a common arrangement, and some states cap what a contractor may take up front, so ask what the rule is where you live.
How many feet of gutter and downspout did you measure, and what is the price per foot for each?
Why ask it
Footage is the number every gutter price is built on, so two installers measuring the same house should land close together. Downspouts, corners and second-story runs are often priced on their own, which is where one bid quietly passes another.
If the crew ends up running more or fewer feet than you measured, does the price change?
Why ask it
Some quotes are a fixed price for the job, and others are an estimate billed on the footage that comes off the machine. Either is fair once you know which one you are signing, and the fixed kind should say what would still count as an extra.
What happens if you pull the old gutter off and find rotten fascia or soffit behind it?
Why ask it
Soft wood behind the old gutter is the classic surprise on a replacement job, and it is better priced before the crew is on the ladders. A per foot rate for new fascia written into the quote keeps the discovery from turning into a negotiation on your lawn.
Would you wrap or replace the fascia while the gutters are off, and what would that add?
Why ask it
The fascia is only fully reachable with the gutter down, so paint, repair or aluminum wrap costs least on this day. Wrap over damp or soft wood hides the rot without stopping it, so the board gets checked first.
How long does this price stand, and does it change if I book for a quieter time of year?
Why ask it
Coil prices move, and a quote should say in writing how many days it holds. A discount that vanishes unless you sign tonight is a sales tactic, and a company with steady work rarely needs it.
Does this job need a permit, HOA approval or a sign-off on where the downspouts drain?
Why ask it
Many places ask for nothing when gutters are replaced, but a historic district or an HOA may rule on color and profile. Where a downspout may discharge, such as across a sidewalk, toward a neighbor or into a sewer, is set locally, so ask the installer and then confirm with your town.
Is there a cheaper version of this job that you would still put your name on?
Why ask it
Good answers are concrete: keep the sound runs at the back, reuse downspouts that are not dented, skip the guards. You learn where the money sits in the quote and whether the first number was the only one on offer.
Job and warranty
When can you start, and how long will the crew be at my house?
Why ask it
Gutter jobs are short, often a day for an ordinary house, so the wait for a start date is usually the longer part. Ask what would stretch it, such as rain, fascia repairs or a second story.
Where will the truck with the gutter machine park, and how much room do you need to run out the longest piece?
Why ask it
A seamless run leaves the machine in one piece as long as your eave and then has to be carried around the house without kinking. Cars, fences, low wires and a narrow side yard are worth pointing out before the morning of the job.
How will you keep ladders off the new gutters and protect the shingles, siding and plants?
Why ask it
A ladder leaned on fresh gutter leaves a dent on day one, which is why careful crews use standoff arms that rest on the roof or the wall. Ask too about the first course of shingles, which can crack if it is lifted in cold weather.
Do I need to be home, and what should I move or unlock before you arrive?
Why ask it
The work is outside, but the crew may need an outdoor outlet, open gates and a clear driveway. Stay reachable by phone in case rotten wood turns up and someone has to approve the extra.
What is your plan for tear-off and cleanup, including the old aluminum and the nails?
Why ask it
Removing old gutter drops rotten leaf sludge, spikes and screws into your beds and lawn. Ask specifically whether they haul the old metal away and run a magnet over the ground before they leave.
Will you run a hose through every run before you leave?
Why ask it
Water from a hose shows in a minute what a storm would show weeks later: a low spot that holds a puddle, a corner that weeps, an outlet that is half blocked. Stand and watch it with them.
Can we walk around the house together before I pay the balance?
Why ask it
Bring the quote and check it against the house: the number and position of downspouts, the hanger spacing, sealant inside each corner, extensions at the bottom. Scratches and dents are easiest to settle while the crew and the touch-up paint are still on site.
Can you separate the warranty for me: what covers the paint finish, what covers your labor, and what voids either?
Why ask it
Material finish warranties are from the coil manufacturer and usually address fading, chalking and peeling, while workmanship is on the installer. Ask directly whether cleaning with a pressure washer, adding guards later, or leaning a ladder on the gutter voids anything.
If a corner drips or a run holds water next year, who do I call and how soon would someone come?
Why ask it
Faults in the hanging or sealing tend to show within the first few seasons of heavy rain, and what counts then is whether anyone comes back. Get the length of the labor warranty in writing along with the name or number that handles callbacks.
Does the warranty pass to the next owner if I sell the house?
Why ask it
Some finish and labor warranties stop with the person who signed the contract, and others transfer once or for a fee. If a sale within a few years is possible, get the transfer terms on the same page as the warranty itself.
How often should these be cleaned, and what should I never do to them?
Why ask it
The schedule depends on your trees, so get a figure for this house and not a general rule. The never list is worth hearing from the person who sealed the corners: what not to hang from the gutter, and which tools scrape the sealant or the finish.
What will the first sign of trouble look like from the ground?
Why ask it
Dirt stripes down the fascia mean water is getting behind the gutter, drips at a corner mean the sealant has let go, and water still standing a day after rain means the pitch has shifted. Knowing these lets you call while the fix is still a tube of sealant or one hanger.
Getting Comparable Gutter Bids
Practical guidance for the conversation itself
How to Run the Estimate Process
Write the Spec, Then Get Three Prices on It
Use the first visit to settle a spec, for example 6 inch K-style, .032 aluminum, hidden hangers at 24 inches, 3x4 downspouts, hand-mitered corners. Then ask all three companies to bid that exact spec. Otherwise the cheapest bid can win by quietly quoting smaller, thinner gutter.
Photograph the Problem During a Hard Rain
Before anyone quotes, go outside in a downpour and take photos and video of where the gutter overflows, where water sheets off a valley, and where the ground stays soggy. Show those clips to each installer. The one who explains the cause instead of just quoting footage has earned a closer look at their bid.
Verify Insurance With the Agent, Not the Gutter Company
Ask for the insurance agency's name and phone number and call to confirm the policy is active and includes workers' compensation. Certificates are easy to edit and expired coverage looks identical to current coverage on a PDF.
Ask Who Is Actually Coming
Find out whether the person quoting is a commissioned salesperson or the installer, and whether the crew is in-house or subcontracted. Then ask which crew lead will be on your roof and whether they have run your gutter size before.
Split the List by Stage
Not every question to ask when installing gutters belongs in the first phone call. The company can be settled before anyone visits. Keep The visit, Size and material (which holds the gutter guard questions) and Hanging and drainage for the walk around the house, with the installer looking at the roof edge you are discussing. Price and contract waits for the written quote, and Job and warranty is for the day you book.
Numbers to Have in Your Head
Rules of Thumb US Installers Quote
- 5 inch K-style with 2x3 downspouts is a common default on US houses and can back up on large or steep roof planes
- 6 inch K-style holds noticeably more than 5 inch, and a 3x4 downspout has about twice the opening of a 2x3, so it clogs less
- Half-round suits historic homes and copper work, usually costs more, and is normally paired with round downspouts
- .027 aluminum is the common grade, .032 is noticeably stiffer against ladder dents and ice
- Hidden hangers screwed into the fascia about every 24 inches, closer where snow loads are heavy
- Pitch of about a quarter inch per 10 feet of run toward the outlet
- Roughly one downspout for every 30 to 40 feet of gutter, more on steep roofs
- Copper and steel seams should be soldered or riveted and sealed, never just caulked
- Finishes sold as Kynar or PVDF are marketed as holding color longer than standard painted coil, so ask which one is on the quote
- None of these is a code requirement: local rainfall, snow and roof shape can change every one, so ask which the installer follows and why
Red Flags in a Gutter Quote
- A price produced entirely from satellite measurements with no one visiting the house
- A per foot number with no gutter size, metal gauge or hanger spacing written anywhere
- Spikes and ferrules proposed on a new installation instead of hidden hangers
- Gutter guards pitched as the fix for gutter that is undersized or sloped wrong
- No line in the scope about rotten fascia, and no per foot rate if they find it
- Downspouts that discharge at the foundation with no extension included
- A large deposit or cash-only terms before any material is ordered
- A discount that expires when the salesperson leaves your driveway
- Vague warranty language such as lifetime with no document naming what is covered