Roofing in Northglenn, CO

Roofing in Northglenn starts with the same question every time: does the scope on the ladder match the scope on the permit? The city’s own homeowner reroofing guide, published through its contracted building-services provider, answers most of the practical questions before a single shingle comes off — when a full tear-off is required, what underlayment the deck needs, and which inspections have to happen before the new covering closes the roof. Our crew builds the schedule around that guide rather than treating the permit as paperwork to catch up on later.

Every Reroof Needs a Permit

Northglenn’s official permit guidance places roofs on both lists that matter for a homeowner planning a reroof: permits are required for roofing work, and roofs are also listed among the trades the city allows to move through the permit process without a full plan-review cycle. In practice that means the paperwork is real but the timeline is usually short compared to a project that needs engineered drawings.

We confirm the permit is issued and posted before tear-off starts. A roof exposed to Colorado weather cannot sit half-open while an application works its way through the queue, so scope confirmation and the CommunityCore filing happen before material is ordered, not after the old shingles are on the ground.

Tear-Off Is the Rule in Northglenn, Not Layering

The city’s current homeowner reroofing guide is direct on this point: all existing roof-covering layers must be removed. That is a stricter position than simply following the general International Residential Code framework, which allows a single overlay in some circumstances. An older Northglenn building department document, written for a previous code edition, does state that a single-layer overlay is allowed — but because that document predates the code edition Northglenn currently has codified, we treat the newer homeowner guide’s complete-removal instruction as the operative rule and confirm current policy with the Building Division before pricing any overlay option.

The same current guide lists specific conditions under which re-covering without removal was never allowed in the first place: a water-soaked or unusable existing deck, existing wood shake, slate, clay, cement, or asbestos-cement tile coverings, an existing roof that already carries two or more covering layers, or asphalt shingles in an area of moderate or severe hail exposure. That hail-exposure line is a Northglenn-published trigger worth knowing before assuming a lighter-scope repair will pass inspection.

Underlayment Follows Slope, Not Habit

For a full tear-off, the city’s guide sets a minimum 15-pound asphalt-saturated felt on a dry deck. Roofs at 4:12 slope or steeper need one layer of underlayment. Lower-slope roofs, between 2:12 and 4:12, need a different lap pattern: a 19-inch starter strip followed by full underlayment courses lapped 19 inches. We check the actual roof pitch before ordering material, because the wrong underlayment package on a low-slope section is one of the more common causes of a failed inspection.

A separate, older city document on residential roofing requirements also states that ice barrier underlayment is not required in Northglenn. That statement was written against the 2009 edition of the International Residential Code, and Northglenn’s currently codified residential code is a newer edition, so we confirm the current ice-barrier position with the Building Division rather than defaulting to that older instruction on every job, particularly on lower-slope roofs or where a manufacturer’s own warranty terms call for it.

Wind Design and Material Requirements

The same older roofing-requirements document gives Northglenn’s structural wind design criteria as 110 mph, measured as a 110 mph three-second gust, under Wind Exposure Category B. It also calls for asphalt shingles rated to ASTM D-3161 Class F wind-resistance testing, drip edge flashing at eaves and gables, roofing nails penetrating the sheathing or at least ¾ inch into the deck, and valley linings sized by material — open metal valleys at least 24 inches wide, or two plies of mineral-surfaced roll roofing with an 18-inch bottom layer and a 36-inch top layer. Because this document is also keyed to the 2009 code cycle, we verify current material requirements with the Building Division before finalizing a product order, especially on a roof where the manufacturer’s own wind rating needs to be matched to the city’s design criteria.

These wind and material details matter most on tear-offs that expose the full deck, where fastener spacing and valley details are set once and are expensive to redo. Our crew checks the selected shingle’s own published wind rating against the site conditions before the deck is dried in.

Inspections Close the Permit

The city’s reroofing guide requires a final roof inspection before the permit is closed, and it also flags that a mid-roof inspection can be required depending on the roofing system installed. We confirm with the Building Division at permit issuance whether the specific material selected for a job triggers that mid-roof check, and we keep a ladder on site and tied off for the inspector, since the guide specifically notes that expectation.

Scheduling the inspection request is part of the roofing sequence, not an afterthought once the crew has already moved to the next job. A roof that is dried in and covered before an inspector has seen the required stage can turn into a delay that costs more than the day it would have taken to wait for the sign-off.

Contractor Licensing and Homeowner Rights

Northglenn requires any hired contractor performing permitted work in the city to hold a current City of Northglenn contractor license, applied for through the same CommunityCore portal used for the permit itself. A homeowner working on their own residence does not need that license to do the work personally, with the usual exception for homes being sold or rented rather than owner-occupied. We do not represent that Apollo holds a standing Northglenn roofing license for every job; licensing status for the specific contractor and trade assigned is confirmed before work begins.

If a utility locate is needed for any ground-level staging, dumpster placement, or related site work tied to the reroof, we request a utility locate through Colorado 811 before digging or setting equipment rather than assuming the yard is clear.

How We Sequence a Northglenn Roof

The sequence starts with a scope walk that identifies the existing layer count, deck condition, slope by section, and any hail-exposure history, followed by the CommunityCore permit filing. Once the permit is issued, tear-off exposes the full deck, underlayment is installed according to the confirmed slope requirements, and flashing, valleys, and drip edge details are set to the current wind and material guidance confirmed with the Building Division.

Before the new covering closes the roof, we coordinate any required mid-roof inspection for the system installed. After the covering and flashing details are complete, the final roof inspection closes the permit. Our crew keeps the deck, underlayment, and flashing visible at the stages Northglenn needs to review, rather than covering questionable work and hoping it passes from the ground.

Common Questions

Does every reroof in Northglenn need a permit?
Yes. The city’s permit guidance requires a permit for roofing work, though roofs are also listed among the trades that can move through the process without a full plan-review cycle.

Can a new roof be installed over the old shingles in Northglenn?
The city’s current homeowner reroofing guide says all existing layers must be removed. An older city document allowed a single overlay under a previous code edition, but we follow the current complete-removal instruction and confirm the current policy with the Building Division before pricing any project.

Is ice barrier underlayment required on a Northglenn reroof?
An older city document states it is not required, but that document is based on the 2009 code edition, not the edition Northglenn has currently codified. We confirm the current requirement with the Building Division before finalizing underlayment, particularly on lower-slope roofs.

How many inspections does a Northglenn reroof need?
At minimum a final roof inspection is required to close the permit. A mid-roof inspection can also apply depending on the roofing system, and we confirm that requirement with the Building Division when the permit is issued.

Talk to Us About Your Project

Tell us the age and layer count of your current roof, the slope by section, the material you are considering, and whether the roof has any documented hail damage. We will sequence the tear-off, underlayment, flashing, and inspection steps around what Northglenn’s Building Division currently requires for your specific roof.