What Is Actually in a Summerville Roofing Estimate the components that decide year six.

Start from the assumption that all three contractors are honest, because it produces better questions than assuming one is a crook.

Honest quotes on an identical roof still diverge for four reasons. Scope of tear-off, whether decking replacement is carried or excluded, the grade of the components specified, and how much of the flashing is being replaced versus reused.

None of those are visible in a bottom-line number. All of them are visible if you ask. The goal of reading an estimate is not to find the cheat, it is to get all the proposals describing the same roof so the prices mean something.

This is the first and largest fork. A tear-off strips everything down to the wood deck. A roof-over lays a new layer over the existing shingles.

A roof-over is faster and cheaper and there are cases where it is defensible. But it means nobody inspected the deck, so any soft sheathing, old leak damage, or failed fastener stays sealed under the new roof for the next twenty years. The assembly gets heavier. The new shingles telegraph the irregularities of the old surface. And the double layer runs hotter, which shortens the life of the shingles you just bought — a real penalty in a Lowcountry summer.

For any home you intend to keep, and especially one that has been through a storm, the tear-off is the honest choice. It is also the only way anyone can give you truthful information about the structure underneath.

Disposal is a legitimate separate cost and belongs on the estimate. What you are checking is that it is written down rather than discovered later.

When the old roofing comes off, the deck is visible for the first time in decades. In Summerville the usual culprits are old leaks around penetrations, and long-term moisture where a valley has been shedding into the same spot for years under a pine canopy.

Nobody can tell you in advance how many sheets will need replacing, because it is under the roof. What a good estimate does is state a price per sheet and, better still, carry an allowance for a plausible quantity so the signed number lands close to the final one.

The estimate to be wary of is the one that says nothing about decking. Silence is not inclusion. It means that conversation happens on the second morning, with your roof open and your negotiating position at its weakest point in the entire project. Ask what the per-sheet price is, and what happens if they find more than expected. Get the answer in writing.

Underlayment is the layer between the deck and the shingles — the secondary waterproofing. It is the single most commonly downgraded component when someone is sharpening a bid.

Felt is the traditional material. Synthetic underlayment is stronger, lighter, does not wrinkle the same way when damp, and holds up far better if it sits exposed for a day or two mid-project. Given how reliably an afternoon thunderstorm arrives between tear-off and dry-in around here, that resilience has practical value rather than theoretical value.

The more important item is the self-adhered membrane, usually sold as ice-and-water shield. The name is misleading in South Carolina. Its function is that it seals around the nails driven through it, and its value here is against wind-driven rain being pushed uphill under the shingle courses. That is a Lowcountry problem, not a northern one.

Ask exactly where that membrane is going. Valleys only is one specification. Valleys, eaves, rakes and around every penetration is a materially better one. Both are real answers from real contractors, and only one of them is on the cheapest bid.

Roofs almost never leak in the open field of shingles. They leak at edges, transitions and holes — and every one of those is a flashing detail. Flashing is also where a fast crew saves the most time.

Drip edge is the metal at the eaves and rakes that supports the shingle edge and sends runoff into the gutter rather than behind it. The residential code requires it on asphalt shingle roofs. It is inexpensive, and on a re-roof it is sometimes simply left alone because the old one is still up there. Reused, bent, corroded drip edge under a new roof is not a saving. It is a defect you paid to bury.

Step flashing is the set of individual pieces woven into the shingle courses wherever a roof plane meets a wall — a dormer cheek, the side of a chimney, the wall of an addition. Because it is interleaved with the shingles, it has to come off and go back on with the roof. The shortcut is to leave the old step flashing in place and run a heavy bead of sealant along the wall instead. Sealant is a maintenance item measured in a few years. Step flashing is a permanent detail. A wall transition relying on caulk is on a countdown from the day it is finished.

Pipe boots are the rubber collars around plumbing vents, and the rubber is very often the first thing on the whole roof to fail — well before the shingles. Replacing them during a re-roof costs almost nothing. Ask whether new boots are included. If the answer is that the old ones look fine, you are being handed a short clock on a long roof.

If ventilation appears nowhere in a proposal, that is worth a direct question.

An attic without adequate airflow runs hot and holds moisture, and both age shingles from the underside. Summerville summers are long and humid enough that this is not a marginal effect. Replacing a roof without correcting a ventilation problem means installing a new roof into exactly the conditions that wore out the last one.

The code sets the requirement as net free ventilating area relative to attic floor area — one to one hundred fifty, improving to one to three hundred when intake and exhaust are balanced and the other conditions are met. The practical version: exhaust at the ridge only works if there is matching intake at the soffits. A ridge vent above soffits that are blocked with insulation or painted shut is decoration.

Shingle manufacturers also commonly condition their material warranty on adequate ventilation. So this line item is not only about roof life, it is about whether the long warranty you are being sold can actually be claimed.

There are two, they cover different things, and sales conversations blur them constantly.

The manufacturer warranty covers the materials. The headline number is long, coverage is usually prorated after an early period, and it generally requires the roof to have been installed to the manufacturer's instructions. Enhanced system warranties often additionally require that the accessories — underlayment, starter, ridge cap, ventilation — come from the same manufacturer and that the installer holds a certification. If a proposal advertises an enhanced tier, the component list has to actually qualify for it.

The workmanship warranty covers the installation and comes from the contractor. This is the one that matters in the early years, because leaks in year one or two are nearly always installation issues rather than material defects. Its value depends entirely on whether the company will still exist and still answer the phone.

Ask for both in writing, and read what voids them.

Roof replacement generally requires a permit. Which office issues it depends on where your Summerville address actually sits, because the area spans more than one jurisdiction and town limits do not follow intuition.

Two things to settle before work begins. Confirm which authority has jurisdiction over your specific address, and confirm in writing which party is responsible for pulling the permit and scheduling inspection.

A contractor who asks you to pull the permit yourself is worth a hard second look. Homeowner-pulled permits shift responsibility for the work onto the homeowner, and a licensed contractor's reluctance to put their own license behind the job is information about the job.

Do not compare totals. Build a grid and fill one column per bid.

Rows: tear-off or roof-over, layers removed, decking price per sheet and allowance, underlayment type, where self-adhered membrane is applied, new drip edge, new step flashing, new pipe boots, ventilation added and its net free area, ridge cap type, manufacturer warranty tier and whether components qualify, workmanship warranty length, who pulls the permit, and cleanup.

Once that grid is filled in, the confusion usually resolves into one of two pictures. Either the numbers converge as the scopes align, in which case choose the company you would rather have on your roof. Or the low bid has several blank rows, in which case it is not a discount. It is a different product.

Anyone unwilling to fill that grid in has answered the question in their own way.