Good Shepherd Roofing replaces commercial and low-slope roofs across Gwinnett County and North Georgia. We are a licensed general contractor, licence number GCCO009698, based at 2505 2nd Ave in Dacula and trading since 2016.

Replacement is the last option, not the first. Before anything is quoted we inspect the roof and show you what is actually there, because a roof with a sound substrate is usually cheaper to restore than to tear off.

Call (833) 477-7663 or book a free inspection.

Four conditions put a roof past economic repair, and the survey is what establishes whether any of them apply.

Saturated insulation across large areas. Wet insulation has lost most of its thermal value and it keeps the deck damp. Moisture retained inside an assembly continues causing damage beneath a surface that still looks intact, so covering it over does not stop it.

Widespread membrane or seam failure. Isolated seam separations are repairs. A membrane that is failing along many seams at once, or that has gone brittle across the field, is at the end of its service life.

A deteriorated deck. If the structural deck beneath has decayed or corroded, nothing installed above it will perform. Deck condition is usually confirmed once the covering is stripped.

Repeated repairs at rising cost. At some point the running cost of patching exceeds the cost of replacing, and a roof under constant repair is also a roof that keeps disrupting the building.

If none of those apply, we will tell you so. Restoration with a fluid-applied coating or a scheduled maintenance programme is frequently the better answer, and recommending a tear-off where restoration would serve is the thing to be wary of in this trade.

We survey the roof surface, every flashing and penetration, the perimeter and parapets, and the drainage system. Where the interior is accessible we inspect the underside of the deck. Findings are photographed with their location recorded.

Where moisture is suspected within the assembly, the wet area is bounded before a scope is written, so the quantity of insulation and deck being replaced is based on evidence rather than an allowance.

The scope is established before the number. A price produced without that is a guess, and it is the reason commercial roofing quotes so often move after work starts. See commercial roof inspection.

TPO and PVC single-ply. Thermoplastic membranes with heat-welded seams that fuse the sheets into a continuous surface. Commonly white and available with rated reflectance. PVC additionally resists grease and chemical exposure, which matters on restaurants and some process buildings. See TPO roofing.

EPDM. Synthetic rubber, a thermoset, seamed with adhesive tape rather than heat. Long field record and good cold-weather behaviour.

Modified bitumen. Asphalt sheets modified with polymers, installed in one or more plies by torch, hot asphalt, cold adhesive or self-adhesion. Robust underfoot, which suits roofs with regular access.

Built-up roofing. Alternating layers of bitumen and reinforcing felts, surfaced with gravel or a mineral cap sheet.

Standing seam metal. Panels joined by raised vertical seams above the drainage plane, with concealed clips that let the panels move with temperature. See standing seam metal roofing.

Tear-off or re-cover. Codes limit how many roof coverings a building may carry, and a re-cover is only permitted where the existing roof is dry and sound. Where insulation is saturated, tear-off is the only correct answer.

Deck repair. Once the covering is off, the deck is inspected and damaged areas replaced. This is the part no estimate can fully predict, which is why a replacement scope normally carries a stated allowance and reconciles it against what is actually found.

Insulation and cover board. The thermal layer, plus a cover board that protects the insulation and gives the membrane a firm substrate. Tapered insulation is used where drainage needs improving.

Attachment. Mechanically fastened, fully adhered or ballasted. This is specified rather than chosen: wind uplift performance is a property of the whole tested assembly, and changing the fastening pattern from the tested configuration can invalidate both the uplift rating and the manufacturer warranty.

Flashings, penetrations and edge. Perimeter edge metal, parapets and coping, curbs at equipment, pipe boots and pitch pans. Most low-slope leaks originate at these points, so they are detailed rather than sealed.

Drainage. Drains, scuppers and crickets behind obstructions, so water is not left standing against a curb or parapet.

Warehouse and distribution. Large uninterrupted low-slope areas where the economics of single-ply are strongest.

Retail and strip centres. Multiple tenancies under one roof, where phasing the work matters as much as the specification.

Office and medical office. Heavy rooftop plant and the access traffic that comes with it.

Churches and schools. Often a mix of steep-slope and low-slope areas, with the junctions between them the critical detail.

Apartment and multifamily. See multifamily roofing.

Light industrial and restaurants. Where process exhaust and grease affect which membranes survive.

There are two separate warranties on a commercial roof and they are commonly confused.

The manufacturer warranty covers the materials, and in a system warranty the assembly, on the condition that it was installed to specification by an approved installer. The workmanship warranty is the contractor’s own cover on the installation.

Both normally impose maintenance obligations on the building owner and exclude damage from neglect, blocked drainage or unauthorised alterations. A documented inspection history is frequently what keeps a warranty in force. See roof maintenance plans.

Good Shepherd Roofing holds Georgia general contractor licence GCCO009698, issued as a General Contractor Company licence. We have operated since 2016.

We are based at 2505 2nd Ave, Dacula, GA 30019. On a commercial replacement that matters after handover as much as during: the firm that installed the roof is local to it.

We replace commercial roofs throughout Gwinnett County, including Dacula, Lawrenceville, Buford, Duluth, Suwanee and Braselton, and across North Georgia including Johns Creek, Winder, Auburn, Hoschton and Athens. We also work in Chamblee.

How do I know whether my commercial roof needs replacing or can be repaired?

A survey establishes it. Replacement is indicated where insulation is saturated across large areas, the membrane or seams have failed widely, or the deck has deteriorated. Short of that, most commercial roof problems are repairable or restorable, and we will show you the evidence either way.

Can a new roof go over the existing one?

Sometimes. Building codes limit how many coverings a roof may carry, and a re-cover is only permitted where the existing roof is dry and structurally sound. Where insulation is wet, a tear-off is the only correct option because covering trapped moisture does not stop the damage.

What roofing systems do you install on commercial buildings?

TPO and PVC single-ply, EPDM, modified bitumen, built-up roofing and standing seam metal, plus fluid-applied coatings where restoration rather than replacement is the right answer.

Will replacement disrupt the business operating in the building?

It is planned around the building. Access, phasing, working hours and keeping tenants unaffected are agreed before work starts, and on multi-tenant buildings the work is usually sequenced section by section.

Why do commercial roofing quotes change after work starts?

Usually because the deck could not be inspected until the covering came off. We bound wet areas during the survey so the scope is evidence-based, and any deck allowance is stated up front and reconciled against what is actually found.

What warranty comes with a commercial roof replacement?

Two: the manufacturer warranty on the materials or the system, and our workmanship warranty on the installation. Both carry maintenance obligations on the building owner. Specific terms depend on the system installed and are confirmed in writing with the quote.

Call (833) 477-7663 or book a free inspection. We will survey the roof, show you what is there, and tell you honestly whether it needs replacing.