Roof Ventilation Done Right
Balanced Intake & Exhaust. Lower Bills.
Ridge vents, soffit intake, gable vents, and powered solutions — engineered to your roof area to prevent ice dams, cut cooling costs, and protect your shingles.
Your Attic Is Probably Too Hot in Summer and Too Wet in Winter
Most homeowners never think about roof ventilation until something goes wrong — ice dams in January, a 140-degree attic in July, or shingles that age 10 years faster than they should. All of these problems come back to the same root cause: inadequate airflow in the attic.
Proper ventilation creates a balanced system where cool air enters through soffit vents at the eaves and hot, moist air exhausts out through ridge vents or other exhaust points at the peak. When this balance is off — blocked soffits, missing ridge vent, or mixed vent types fighting each other — you get moisture buildup, heat damage, and higher energy costs.
As an Owens Corning Preferred Contractor, we follow manufacturer ventilation requirements to the letter. That’s how your shingle warranty stays valid and your roof performs the way it’s supposed to.
- Prevents ice dams by keeping roof deck cold in winter
- Reduces attic temperatures by 30-40 degrees in summer
- Extends shingle lifespan by preventing heat damage
- Required by code and by shingle manufacturers for valid warranties
Types of Roof Ventilation We Install
The right ventilation system depends on your roof design, attic configuration, and current airflow situation. Here are the options we work with.
Ridge Vents
Installed along the entire peak of your roof, ridge vents provide continuous exhaust along the highest point. They work with soffit vents to create natural convection — hot air rises and exits while cooler air is drawn in from below. This is the gold standard for residential ventilation.
Box Vents & Turbines
Static box vents are simple and effective for roofs where ridge venting isn’t possible. Turbine vents use wind power to actively pull hot air out of the attic. Both are good options for hip roofs, complex roof lines, or as supplemental ventilation.
Soffit Vents
The intake side of the equation. Soffit vents allow fresh air to enter the attic at the lowest point of the roof system. Without adequate soffit intake, your exhaust vents can’t do their job. We install continuous soffit strips or individual vents depending on your home’s construction.
How to Tell If Your Roof Ventilation Isn’t Working
Most ventilation problems don’t announce themselves with a leak. They show up as higher energy bills, premature shingle aging, or ice dams that seem to come out of nowhere. Here’s what to watch for:
- Ice dams in winter — heat escaping into the attic melts snow on the roof, which refreezes at the eaves
- Extremely hot upstairs rooms — your attic is acting like an oven and radiating heat downward
- Moisture or frost in the attic — warm, moist air is condensing because it can’t escape
- Shingles curling or aging unevenly — excess heat from below accelerates breakdown
- Blocked soffit vents — insulation pushed against the eaves cuts off intake airflow
If any of these sound familiar, give us a call. We’ll inspect your attic ventilation for free and tell you exactly what needs to change.
Our Ventilation Assessment Process
We don’t guess. We calculate your attic’s ventilation needs based on square footage, roof design, and current airflow.
Attic Inspection
We go into your attic and check existing vents, insulation placement, baffles, moisture signs, and current airflow. We also measure the attic square footage to calculate required ventilation.
Calculate NFA
Net Free Area is the actual open space your vents provide for airflow. Code requires 1 sq ft of NFA per 150 sq ft of attic floor (or 1:300 with balanced intake/exhaust). We calculate what you have vs. what you need.
Design the System
Based on the numbers, we recommend the right combination of intake and exhaust — ridge vent, soffit vents, box vents, or a combination. We size everything to meet code and manufacturer specs.
Install & Verify
We install the ventilation components, add insulation baffles where needed to keep soffit vents clear, and verify airflow balance. You get documentation of the NFA calculation for your records.
Roof Ventilation Questions
Not seeing your question? Call us — we’ll explain it in plain English.
Ventilation needs to be balanced — roughly equal intake and exhaust. Adding more exhaust without matching intake actually makes things worse because the exhaust vents start pulling air from each other instead of from the soffits. That’s why we calculate the whole system, not just add vents.
Generally no. Mixing exhaust types creates short-circuits in the airflow — the lower exhaust vent becomes an intake for the higher one. If you have a ridge vent, that should be your only exhaust. We’ll assess your specific situation and recommend the right approach.
If you have a sealed, conditioned attic with closed-cell spray foam on the underside of the roof deck, you don’t need traditional ventilation — the foam creates an air barrier. But if you have spray foam on the attic floor (open attic above), you still need ventilation. We’ll check your setup.
Yes, especially in summer. A properly ventilated attic can be 30-40 degrees cooler than an unventilated one, which means your AC doesn’t have to work as hard. In winter, it prevents moisture damage that degrades insulation performance.
Go into your attic and look toward the eaves. If you can’t see daylight coming through the soffit vents, or if insulation is pressed up against the eaves blocking the opening, your soffits are blocked. Insulation baffles solve this by creating an air channel between the insulation and the roof deck.
It can. Both Owens Corning and GAF require adequate ventilation as a condition of their shingle warranties. If your attic doesn’t meet ventilation requirements and your shingles fail prematurely, the manufacturer can deny the claim. We make sure your ventilation meets spec.
Your Roof Needs to Breathe.
Get a free ventilation assessment and find out if your attic is working the way it should.
Mon-Fri 7am-8pm | Sat 7am-6pm | nailforcecontracting@gmail.com