What roof ventilation involves
Ridge and box vents matched to soffit intake so air actually moves through the attic.
Exhaust without intake does nothing. Balance is the whole point.
What matters on roof ventilation
What actually shortens a roof up here
Most of it is things sitting on the roof holding moisture: needles in the valleys, debris behind a chimney, moss on the north slope. None of it is dramatic and all of it works on the roof every day.
Ventilation is the quiet one
An attic that cannot breathe cooks the shingles from underneath in summer and drives ice dams in winter. Exhaust without matching intake does nothing at all, which is the most common ventilation mistake we find.
Roof Ventilation on real jobs
How the system goes together
What underlayment actually does
Shingles shed water. Underlayment is what handles the water that gets past them, and something always gets past them. Synthetic underlayment has largely replaced felt because it does not wrinkle when it gets damp, does not tear when the wind catches it during installation, and keeps its footing when a crew is working a steep slope.
Felt still shows up
On small repairs and on matching an existing older assembly it is fine. On a full replacement up here there is no reason to go back to it.
Pipe boots and roof penetrations
The rubber collar around a plumbing vent is the shortest-lived thing on most roofs. Ultraviolet at this elevation cracks that rubber long before the shingles are tired, and the crack sits directly over an open hole in the deck. Lead boots or a metal collar with a replaceable seal last considerably longer.
Everything that comes through gets a plan
Furnace flues, swamp cooler curbs, satellite mounts, solar standoffs. Each one is a hole somebody has to detail correctly.
What we check
- Net free area of the exhaust against the intake
- Whether soffit intake is blocked by insulation
- Ridge vent continuity along the run
- Signs of condensation on the decking underside
How we approach it
Look first
We get on the roof and read what is actually happening before quoting anything.
Say what we find
Photographs and a plain explanation, including when the answer is that you do not need us yet.
Built in sequence
Crews we hire and run, working the right detail in the right order.
Leave it clean
Magnet over the yard, container gone, walked with you.
Moss and shade on the north side
Under mature trees on a shaded slope, the north face stays damp long after the rest of the roof has dried. Moss takes hold in that damp, and moss holds water against the mat and lifts shingle edges as it grows under them.
It is a cleaning problem first
Pressure washing an asphalt roof strips the granules and takes years off it. Gentle treatment, then clearing the overhanging limbs that keep the slope wet, is the order it should happen in.
Watch the gutter below
Moss coming off in the gutter is a sign the mat is losing surface too.
The wet spring snow problem
Late season storms carry more water per inch than anything that falls midwinter. That heavy stuff clings to a roof instead of sliding, pushes on gutters, and refreezes at night into a solid mass on the overhang. It is also the load most likely to find a framing weakness.
After a heavy spring storm
Walk the drip line and look for bent gutter hangers and separated seams. Then look at the ceilings inside along exterior walls.
What we check on the deck
Spongy sheathing between rafters, especially over the eave where the ice sat.
What this looks like on a real roof
There is a version of roof ventilation that gets sold off a clipboard in the driveway and a version that comes off actually reading the roof. The second one costs the same and lasts.
What follows is the part most people never get told: what usually went wrong before we arrived, and what the job looks like when it is done in the right order.
Where roofs go wrong
The shortcut we see most
A pressure washer taken to moss. It clears the green and takes the granules with it, trading a cosmetic problem for a shortened roof life.
What good looks like instead
Growth treated and removed gently, valleys and gutters cleared, and the shade or ventilation issue that grew it addressed.
Signs worth a look
- Moss or growth on the north-facing slope
- Needles or debris packed into the valleys
- Gutters holding water rather than draining
- An attic that smells damp or feels hot in summer
What to expect
How often
Once a year is right for most houses, ideally in early autumn before the first snow. Add a look after any storm that was genuinely severe.
What a maintenance visit covers
Debris cleared from valleys and gutters, growth treated, sealant checked at every penetration, fasteners and flashing inspected, ventilation confirmed, and photographs of anything worth watching.
Why it is worth it
Almost everything that shortens a roof up here is gradual and invisible from the ground. Catching it in September costs a fraction of what the same problem costs in February.
Related work
Upkeep covers more than one job, and they are not interchangeable. These are the others in the same family, each on its own page.
Questions we get asked
Not the question you had? Call the shop and ask a person. We would rather talk it through than have you guess from a website.
(801) 382-8898How often should a roof be looked at?
Once a year is plenty for most houses, ideally before winter. If a big storm comes through, that is worth its own look.
Is pressure washing a roof a good idea?
No. It strips granules and takes years off the roof. Moss and growth get treated and removed gently instead.
Does ventilation really matter?
It is one of the most common things we find wrong. Exhaust without intake does nothing, and an unbalanced attic drives both ice dams and early shingle wear.
What happens if you find bad decking?
We show you. The decking is only visible during a tear-off, so that is when soft sheathing gets found and replaced. We photograph it rather than just add it to a list.
What makes a Utah roof different?
Snow load, ice at the eaves, canyon wind and high-altitude sun, all on the same roof. A crew that learned roofing somewhere mild has to learn it again up here.
Will you tell me if I do not need a new roof?
Yes. Plenty of what we look at turns out to be a repair, and we say so. A roof with years left in it gets left alone, and you get the photographs either way.
Ask about roof ventilation
Call (801) 382-8898 or send a note. We will look at the roof and tell you straight what it needs.