Lindon, UT · Serving Salt Lake, Utah, Davis, Summit and Wasatch counties (385) 438-3591

Do I really have to replace the flashing, vents and gutters when I replace the roof, or is that an upsell?

Direct Answer

When you replace the roof, the flashing and vents mostly need replacing too, and that is not an upsell. Vents, pipe boots, skylight flashing and valley metal should be new every time. Sound wall flashing behind stucco or rock can sometimes stay. If you can afford it, I'd replace the gutters too, and about 30% of our customers do.

Mattie Tueller

Mattie Tueller

Owner & General Manager, Master Roofing · Utah License #10694610-5501

Lindon, UT · serving Salt Lake, Utah, Davis, Summit and Wasatch counties

Best Move

Expect new vents, pipe boots, skylight flashing and valley metal on every new roof.

Why It Works

Those parts seal every hole and seam in the roof, so old ones can leak under brand-new shingles.

Next Step

Ask the roofer which flashing they plan to reuse, and why.

What you need to know about flashing, vents and gutters on a new roof

On a new Utah roof, the vents, pipe boots, skylight flashing and valley metal should be new every time. Gutters are your call.

Mattie Tueller, Master Roofing

Which roof parts should be new with every replacement

Some roof parts should be new with every replacement, because they seal the holes and seams that water looks for. Expect these on every estimate:

  • Vents, including ridge and attic vents.
  • Pipe boots, the collars that seal around plumbing pipes.
  • Skylight flashing. Master Roofing recommends replacing the skylights too.
  • Valley metal, where two slopes meet and the most water runs.

Everything on the roof should be new except the pipes that come through it. Old vents and boots can leak under brand-new shingles, so these parts are not upsells. Why so many skylights leak has its own answer.

When old flashing can be reused on a new roof

Old flashing can be reused on a new roof only in a narrow case. Utah's code says flashing on a re-roof must be rebuilt to the shingle maker's instructions. So reuse is an option only where those instructions allow it. Even then, all of these should be true:

  1. It is step or headwall flashing tucked behind stucco, rock or brick, where removing it is very expensive.
  2. It is in good condition and not rusted.
  3. There have been no leaks in that area.

Then a good roofer can layer the new shingles back into it. If the flashing sits behind siding, or can be changed without tearing into the wall, it should be changed. If the roof has been leaking, the flashing near the leak should be replaced.

Deciding which flashing stays takes a real inspection, which is why the inspection comes before the estimate.

When to replace gutters with a new roof

Replacing gutters with a new roof is optional, but it is often a good time to do it. The aluminum lasts. The seals at the corners and downspouts usually stop working well after 20 to 30 years. That is about the same life as the roof.

Three reasons to do both at once:

  • Re-roofing is hard on gutters and can damage them.
  • The roofer can fit the new gutters to the new roof.
  • With new gutters, the drip edge and the roof's lowest edge can be waterproofed better.

About 30% of Master Roofing's customers get new gutters with a new roof, usually because the old ones were already giving them trouble. If you want guards on the new gutters, whether gutter guards are worth it has its own answer.

How to tell a needed roof item from an upsell

To tell a needed roof item from an upsell, ask the roofer to sort the estimate into two groups. One is what the new roof needs to keep water out. The other is what is optional. A good roofer can explain every line in plain words.

Needed every timeYour call
Vents and pipe bootsNew gutters and downspouts
Skylight flashing and valley metalGutter guards
Ventilation to code, and drip edge at the eaves and rakesUpgraded shingles

If a roofer insists on replacing something from the right column, ask why. There may be a good reason, like rust or an old leak. Whether a full replacement is an upsell is its own question.

Mattie's Take

As a roofing contractor in Utah, I get this question a lot. It's a fair one, because a homeowner can't see any of this from the ground. The answer depends on what's on your house now. Every pipe flashing gets replaced with a new roof. So do the vents, the skylight flashing and the valley metal.

Wall flashing is different. When it's tucked behind stucco or rock, pulling it out is really expensive. If it's been working and it isn't rusted, I'd consider reusing it and layering the new shingles back in. That's because flashing done right the first time can keep working. At Master Roofing, a Utah roofing company, we only reuse it when there's no leak in that area.

Gutters are your call, though a re-roof is a good time to replace them if you can afford it. Vents and pipe flashings are not where you save on a new roof. You end up with a new roof that stays dry around every opening.

Before you act on this

This article is general information about Utah roofs, not an assessment of yours. Every roof is different, and no article can tell you what is actually happening on your specific house. Have a licensed roofing contractor look at it in person before you act on anything here.

More questions about flashing, vents and gutters on a new roof

Do I need new drip edge with a new roof?

You need drip edge with a new roof, because Utah's residential code requires it at the eaves and rake edges of a shingle roof. On roofs steeper than 9/12, drip edge bent to the roof's pitch works best. Stock 90-degree drip edge on a steep roof can push water sideways and rot the bottom edge.

Should the roofer replace my pipe boots?

The roofer should replace every pipe boot with a new roof. Pipe boots seal around the plumbing pipes that come through the roof, and an old one can leak under brand-new shingles. Everything on the roof except the pipes themselves should be new.

Can I keep my gutters and replace them later?

You can keep your gutters and replace them later, but doing it with the roof is easier. Re-roofing tends to damage gutters, and new gutters let the roofer seal the roof's lowest edge better. If yours are working and the budget is tight, keeping them is a fair choice.

Should skylights be replaced with a new roof?

Skylights are worth replacing with a new roof, and Master Roofing recommends it. At the very least, the skylight flashing should be new. Old flashing around a skylight can leak under brand-new shingles, and redoing it later means opening the new roof.

Related pages

Mattie Tueller

Mattie Tueller

Mattie Tueller is the owner and general manager of Master Roofing in Lindon, Utah. He came up through the trades (flooring, tile, and full renovations under a general contractor who expected everything built right), ran statewide operations as a political director, then spent a year inside a sales-first roofing shop and built Master Roofing as its opposite: in-house crews trained by the owner, a dedicated quality check on every job, ventilation built to code on every bid, and warranties that mean what they say. He serves as an expert witness in roofing litigation.

About Master Roofing. Master Roofing is a licensed Utah roofing contractor (license #10694610-5501) based in Lindon and serving homeowners across Salt Lake, Utah, Davis, Summit and Wasatch counties, including Salt Lake City and the Wasatch Front and Back. Owner Mattie Tueller and the company's in-house crews handle roof inspections, hail and wind damage assessments, insurance claims, roof repair and replacement, asphalt shingle and metal roofing, flat and low-slope roofs, skylights, snow retention, gutters and gutter guards, attic ventilation, and Roof Maxx shingle restoration. GAF Master Elite, Owens Corning Preferred, BBB A+.

resources.masterroofingutah.com

We're community focused and here to help.

We're here to see what's going on with your roof. A real assessment starts with your history and your attic, not a number from the driveway. You'll get a straight answer about what's up there, what it needs, and what it costs. Sometimes the honest answer is: your roof looks great.

Book a Free Assessment