Curbs
Curbs Too Short for a Thicker Roof
When insulation gets added, a short curb leaves too little flashing height, and wind-driven rain gets over the top.
Lebanon Commercial Roofing Contractor
Protect Rooftop Units From Leaks at Short Curbs and Tired Flashing
As a Lebanon commercial roofing contractor, we replace and repair roofs crowded with rooftop units, raising curbs and reflashing each one so the new roof stays tight.
Roofs Crowded With Equipment
Equipment-heavy roofs are where a Lebanon commercial roofing contractor spends the most detail time. Every rooftop unit, exhaust fan, and duct sits on a curb, and each curb is a flashing joint that has to stay tight while the unit vibrates and the roof moves.
A new roof with thicker insulation raises the surface against those curbs. Units get lifted so curbs can be raised and flashed again, and mechanical contractors are scheduled to disconnect and reconnect them around the roofing crew.
- Curb heights checked against the new roof
- Mechanical disconnects scheduled
- Crane days for lifting units
- Walkway pads to every unit
Commercial Roofing Problems Around Lebanon Rooftop Units
Leaks on equipment-heavy roofs start at one of these four details.
Flashing
Cracked Curb Flashing
Vibration and years of sun dry out curb flashing until it cracks at the corners, where water slips under the membrane.
Penetrations
Ductwork and Conduit Through the Roof
Duct, gas line, and conduit penetrations sealed with pitch pans that have dried and shrunk leak around their edges.
Traffic
Worn Paths to Each Unit
Technicians cross the same paths for every service call, wearing through the sheet where walkway pads were never laid.
What a New Roof Gives an Equipment-Heavy Building
Getting the curbs right is most of what a new roof does on a building like this.
On The Roof
Curbs at the Right Height
Raised curbs leave room for full flashing height above the thicker roof and its new insulation.
Penetrations Rebuilt
Pitch pans are replaced with pre-formed pipe boots where pipes allow, and ducts get new curb flashing.
Inside The Building
Dry Space Under the Units
Leaks over offices and production space stop once the curbs and penetrations around each unit are closed.
Equipment Back on Schedule
Mechanical contractors disconnect and reconnect units on a set schedule, so cooling and heating return as planned.
For Planning And Budget
Service Paths Protected
Walkway pads to each unit keep future service calls from wearing out the new membrane.
A Unit-by-Unit Record
Photos of every curb after flashing show the next technician where the roof work ends.
Commercial Roofing Systems for Lebanon Equipment-Heavy Roofs
These three services fit roofs carrying many units.
TPO Roofing
Pre-formed TPO curb wraps and welded corners make each unit's flashing part of the membrane.
TPO roofing
Industrial Roofing
Plant roofs with heavy units on steel frames need high-density cover boards and planned lifts.
Industrial roofing
Commercial Roof Repair
Cracked curb flashing and leaking pitch pans can be fixed one unit at a time between replacements.
Commercial roof repairLeak Under a Rooftop Unit?
Call and tell us which unit sits over the stain, and the roof walk starts at that curb.
How a Lebanon Commercial Roofing Contractor Handles Rooftop Units
Six steps keep the roofing and the mechanical work in the right order.
Inspect Your Roof
On The RoofWe walk every curb, duct, fan, and penetration, measure curb heights against the planned roof thickness, and check the deck from inside under each unit.
Coordinate the Mechanical Work
PaperworkYour mechanical contractor is scheduled for disconnects, and crane or lift days are set for units that have to come off their curbs.
Permit With the City
PaperworkInside Lebanon, the city's building inspector reviews the roof replacement; for an address past the city line, jurisdiction is checked with the state housing department.
Raise Curbs and Flash
On The RoofUnits come off, curbs are raised for the new insulation, and each one gets new flashing before the unit goes back.
Reconnect and Protect
At The BuildingMechanical contractors reconnect the units, walkway pads go down on each service path, and every curb is photographed.
Check Curbs After Heavy Rain
On The RoofAfter the units are back and the first heavy rain passes, the curbs and new flashing get a walk to confirm they shed water before the job is closed out.
Where We Take Commercial Roofing Jobs Near Lebanon
Building out past Lebanon? call us or send us a message. Our commercial roofing area takes in Elizabethtown and each town listed below.
Elizabethtown
Home base, with city plan review for reroofing.
Elizabethtown commercial roofingLeitchfield
Storefront rows and Grayson County permits.
Leitchfield commercial roofingHodgenville
Church and school roofs, LaRue County permits.
Hodgenville commercial roofingMunfordville
Season-by-season scheduling, Hart County permits.
Munfordville commercial roofingBardstown
Historic district roofs, Nelson County permits.
Bardstown commercial roofingSpringfield
Drains and scuppers, city inspector review.
Springfield commercial roofingAlso Serving
Lebanon Rooftop Unit Roofing Questions
Answers about curbs, units, and permits during a reroof.
Which office reviews a commercial roof replacement in Lebanon?
Inside Lebanon, the city's building inspector does, the local office on the state's Marion County sheet. For an address past the city line, check with the Kentucky Department of Housing, Buildings and Construction about who has jurisdiction. Give the inspector checkable details: tear-off or recover, insulation, edge metal and gutters, and any units lifted for curb changes.
Do rooftop unit curbs need raising during a reroof?
Often, yes. New insulation set to the energy code raises the roof surface, and a curb that was already short leaves too little flashing height. Units are lifted, curbs are extended, and the flashing is rebuilt to the right height above the finished roof.
Why does the flashing around an HVAC curb leak in Lebanon, KY?
Vibration, sun, and roof movement crack curb flashing at the corners, and a curb too short for the roof lets water over the top. Pitch pans around ducts and gas lines shrink as their filler dries. The fix is new flashing at the right height, with reinforced corners.
Who disconnects rooftop units during a roof replacement?
A licensed mechanical contractor, scheduled around the roofing crew. They disconnect units before lifting, then reconnect and test them after the curbs are raised and flashed. The roofing schedule is built around those visits so cooling and heating come back as planned.
What does a Marion County roof permit involve?
The city inspector handles it inside Lebanon, and outside the city the state housing department confirms who has jurisdiction. Either way, bring the tear-off or recover plan, insulation type and thickness, new edge metal and gutters, and the list of units being lifted, along with membrane or panel data sheets.
Do rooftop units need walkway pads?
They should have them. Technicians walk the same path on every service call, and without pads the membrane wears or gets punctured by dropped screws. Pads run from the hatch or ladder to each unit so traffic stays off the open field.
Call a Lebanon Commercial Roofing Contractor
Start with a roof walk that measures every curb, and the mechanical schedule follows from there.