
Lehi, Utah
Commercial Roofing around Lehi
Low-slope and membrane systems for commercial buildings.
Commercial Roofing for Lehi homes and buildings
TPO, EPDM, PVC, modified bitumen and built-up, specified for the building and the traffic it takes.
Lehi has grown fast, which means a great many roofs went on within a few years of each other and are now aging out together. Ventilation and nailing pattern are the two things we check first on these.
A commercial roof is a different trade from a steep-slope house roof. We do both, separately.

What matters on commercial roofing
Drainage before material
The first question on any low-slope roof is where the water goes. Ponding is what kills membranes, and a roof that holds water for days after a storm will fail early regardless of which sheet is on it. We look at the slope, the drains and the terminations before we talk about material.
Seams and terminations
Field failures on commercial roofs are rare. Failures at seams, curbs, drains and the parapet edge are common. A hot-air welded seam that has been probed is a continuous sheet. Anything taped or glued and unverified is a scheduled leak.
Commercial Roofing around Lehi



How the system goes together
Flat roofs and the membrane choice
Low-slope roofs do not shed, they hold. TPO is a heat-welded white sheet that reflects a lot of the summer load. EPDM is a black rubber sheet that handles cold and movement well. PVC costs more and handles grease and chemicals, which is why it ends up over restaurant kitchens. Modified bitumen comes in rolls torched or adhered in layers, and built-up is the old tar-and-gravel assembly still sitting on plenty of buildings here.
Drainage beats material
Whichever sheet goes down, if the water does not get to a drain within a couple of days, the roof is going to fail early.
A welded seam versus a glued one
On a single-ply roof, the seams are the whole roof. Heat welding fuses the two sheets into one piece of plastic, and a properly welded seam is stronger than the sheet either side of it. An adhesive seam relies on a bond that ages at a different rate than the membrane does.
How a seam gets proven
A probe run along the edge of every weld while the crew is still on the roof. If the probe catches, the seam gets rewelded then and there, not written down for later.
Cold days need slower welds
The machine settings change with the air temperature or the weld runs cold and looks fine.
What we check
- Field condition and granule loss
- Valleys, ridges and every transition
- Penetrations and their flashing
- Gutter and fascia condition
What the job looks like
Get on the roof
We walk it rather than look from the drive, check the decking underfoot, the flashings and the ventilation, and photograph what we find before any number is discussed.
Show you what we saw
The photographs come back to you with a plain read of what the roof needs and, just as often, what it does not need yet.
Crew on site
The crews we hire work under Hancock’s direction, staged so landscaping and the drive are protected, working the detail in the order it is supposed to go on rather than the order that is quickest.
Leave it clean
Site cleared at the end of every day, a magnet run over the whole yard for nails at the finish, and the roof walked with you before we go.
Rain driven sideways into a lap
Shingles are built to shed water running downhill. A thirty mile an hour gust with rain in it does not run downhill, it runs across and up. That is the one condition where a lap that has worked for fifteen years lets water through, and it is the reason a leak can appear in a specific storm and then never again.
Chasing a wind-only leak
You cannot find it on a dry day by looking. You find it by knowing which wall faces the weather and checking every horizontal joint on that face.
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.
Where roofs go wrong
The shortcut we see most
A membrane laid over wet insulation because tearing off would have cost a day. The roof looks finished, the moisture stays underneath, and the sheet fails early from below.
What good looks like instead
Moisture surveyed, wet sections cut out and replaced, drainage corrected, then the membrane installed and its seams probed.
Signs worth a look
- Ponding water still standing two days after rain
- Seams that have lifted or opened at an edge
- Blisters or ridging across the field
- Interior staining near drains, curbs or the parapet
Part of our Utah County work, out of Salt Lake City & surrounding counties. A full replacement carries our 10-year workmanship warranty.
What to expect
Scheduling around your operation
Most commercial work can be staged so the disruptive part happens when the building is quiet. Tear-off noise, crane or hoist time and material deliveries all get planned against your hours rather than ours.
What the roof survey covers
Before specifying anything we survey the existing assembly: slope and drainage, moisture in the insulation, the condition of seams and terminations, and how the roof is being used. A roof somebody walks on weekly needs a different answer from one nobody touches.
Documentation
Commercial and public work runs on records. We photograph the existing condition, the work in progress and the finished assembly, so there is a file rather than a recollection.

On a Lehi roof

Getting to Lehi
On a booked replacement the calendar does most of the work. On the day something fails at a Lehi house, stopping the water comes first and the real repair follows.
That proximity is most of what matters when weather moves through. Lehi sits in Utah County, and we are on roofs across it regularly enough to know how the housing there was built.
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) 382-8898Do you actually work in Lehi?
Yes, and often. Lehi is part of our regular service area, so it is ground we know well.
How fast can you get to Lehi after a storm?
We stop the water first. Temporary work is genuinely temporary and we say so, but it buys the time to do the actual repair right.
How do I know when a roof is getting close?
Granules collecting in the gutters, tabs lifting or curling at the edges, shingles that look bare in patches, and daylight or staining in the attic. Any of those is worth a look.
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.
How long does a roof replacement take?
Most houses in this valley are a one to two day job once the crew is on site. Steeper pitches, multiple layers to strip and complicated roofs with a lot of valleys take longer, and we tell you which yours is before we start.
Where Lehi sits on our map
Crews reach Lehi on the normal week, not as a special run.
Talk to Hancock
Commercial Roofing in Lehi
Call (801) 382-8898.