Flat Roof Installation
Flat Roof Installation in Lakewood, CO That Sheds Water
A flat roof is never truly flat — it is a low-slope roof that has to move water to a drain, a scupper, or an edge, and when the slope is wrong the water ponds, the seams open, and the leak finds the ceiling below. In Lakewood, flat and low-slope roofs show up on homes with additions and on multifamily buildings, where the roof belongs to the building and the work needs the owner's approval first. Call (720) 817-3348 and talk through your low-slope roof with a local crew.
Service overview
What Flat Roof Installation in Lakewood Actually Involves
A flat roof installation starts with the slope, not the membrane. We measure the existing deck, then design tapered insulation so water moves toward drains or scuppers instead of sitting in a low spot. The membrane — TPO or EPDM — goes over the insulation, with seams welded or adhered, and every penetration, parapet, and edge gets flashed for a low-slope system. The 2021 International Residential Code requires tear-off to the deck on a re-roof, with one layer only and Class A covering citywide.
Before tear-off we pull a City of Lakewood permit through eTRAKiT. A re-roof permit is required before work starts, and the flat re-roof fee is $110 under Resolution R-2020-48 — verify the current fee with the City when you call. The permit also means a City inspection of the finished work. Denver-metro market ranges from October 2026 put TPO and EPDM at about $4 to $15 per square foot installed, priced by measured roof area in squares, not living area. Those are market ranges, not this business's prices. This business serves residential clients, including multifamily homes, and we do not take on commercial roofing work.
Practical benefits
Why a Proper Flat Installation Matters
Flat roofs fail at the details: slope, seams, and drainage. Here is what a proper installation buys you.
Water That Actually Leaves the Roof
Tapered insulation gives water a path to the drain. Without it, water ponds, and ponding water is what opens seams and finds the ceiling below. Our Belmar guide explains why a flat roof ponds water.
Seams That Hold Through Freeze-Thaw
TPO seams are heat-welded and EPDM seams are adhered. Both are built for the freeze-thaw cycles that open a poorly sealed seam in one winter.
No More Mystery Leaks
A low-slope leak can travel a long way before it shows inside. A new membrane with flashed penetrations and parapets closes the paths water was using.
A Roof You Can Maintain
A clean membrane with clear drains is easy to inspect and easy to keep. Annual checks catch a seam or a clogged drain before either becomes a leak.
How service works
What to Expect During Your Flat Installation
Flat roofs take careful measuring before anything is ordered. Here is the sequence.
STEP 01
Roof Inspection
We walk the roof, check the decking and the existing slope, and find where water ponds after rain. Photos show you the low spots and the failed seams.
Tools and methods
Tools and Methods We Use on Every Flat Roof
Tapered insulation layout
Cut to your roof so water moves toward drains instead of ponding in a low spot.
Heat welder for TPO
A heat welder fuses TPO seams into a single continuous sheet rather than gluing them, so the joints are as strong as the membrane.
Adhesive and seam tape for EPDM
Adhesive and seam tape bond EPDM seams and flashing with a flexible hold that survives temperature swings.
Roofing nail gun
Insulation and base layers are fastened at the spacing the membrane maker specifies, so the system holds under wind and snow load.
Chalk line
A chalk line marks drain locations and insulation cuts, so the slope plan drawn on paper matches the roof.
Safety harness and ladder stabilizer
The crew stays tied off on parapet edges and two-story buildings with a harness and ladder stabilizer.
Flashing at parapets and penetrations
The most common flat-roof leak point. Parapet caps, vent pipes, and drains each get flashed for a low-slope system, not adapted from a shingle detail.
Drain and scupper checks
Every drain is tested before we leave, because a membrane is only as good as the water leaving it.
Ice-and-water shield at edges and valleys
Self-adhering membrane where water concentrates at edges and valleys. Lakewood does not require an ice barrier; this is best practice on a new flat roof.
Magnetic sweep cleanup
Fasteners, screws, and membrane offcuts are swept out of the yard and driveway before we leave.
Where this service fits
When a Flat Roof Installation Is the Right Call
Water ponds on the roof days after rain
Ponding means the slope is wrong, not just the membrane. Tapered insulation fixes the slope, and a new membrane finishes the job.
The membrane is splitting at the seams
Seam splits across the roof mean the membrane is done. A new welded or adhered membrane resets the roof.
An addition or a multifamily building needs a new low-slope roof
Additions and multifamily roofs are the common flat roofs in Lakewood. We work with the homeowner or the building owner, and confirm who approves the work first.
A previous flat roof was installed without a slope plan
A membrane laid on a dead-flat deck will pond. We rebuild the slope with tapered insulation instead of laying another membrane on the same problem.
Local execution
How Flat Roof Installation Works in Lakewood
Flat and low-slope roofs in Lakewood are mostly on homes with additions and on multifamily buildings, and a new one starts with the slope plan, not the membrane. Denver-metro market ranges from October 2026 put TPO and EPDM at about $4 to $15 per square foot installed, priced by measured roof area in squares, not living area — market ranges, not this business’s prices. Tapered insulation gives the water a path to the drains, the membrane is welded or adhered over it, and every penetration gets flashed for a low-slope system. The 2021 code requires tear-off to the deck on a re-roof, so the slope plan is drawn before a single roll is ordered.
Flat work in Lakewood is mostly on additions and multifamily buildings, and the details change by area. See the seven neighbourhoods on our locations page.
Problems we solve
Roof Problems a Flat Installation Solves
These are the problems where a new flat roof is the answer — and where we will tell you if a repair would do instead.
Ponding water that never drains
A membrane on a dead-flat deck will always pond. Tapered insulation gives the water a path out, and a new membrane finishes the job.
Seams splitting across the roof
Widespread seam failure means the membrane is at the end of its life. A new welded or adhered membrane resets the roof instead of chasing one split after another.
Leaks that show up far from the damage
On a low-slope roof, water travels under the membrane before it shows inside. A full installation with flashed penetrations closes the paths it was using.
A roof that is impossible to maintain
A membrane with clear drains and accessible penetrations is easy to inspect. A roof with buried drains and sealed-over flashing is not — and that is a design problem, not a maintenance problem.
Need help?(720) 817-3348
A practical standard for every visit.
Clear planningPrepared arrivalsCareful workLocal follow-through
Experience in the details
Why Our Crews Get Flat Roofs Right
A flat roof is a drainage system with a membrane on top, and the drainage comes first. Colorado has no state roofing licence; the City of Lakewood registers roofing contractors under Class 5h, Roofing and Waterproofing. We work to the 2021 International Residential Code, pull the permit before tear-off, and design the slope before we order a single roll of membrane. This business serves residential clients, including multifamily homes. Every job ends with a walkthrough and a drain test.
Where we work
One local team. Lakewood neighborhoods we know.
Notes from local customers
What Lakewood Homeowners Say
Roof Authority, LLC (Keith Merritt) has done numerous roofing jobs for our family. I first met him over 15 years ago when he presented himself with integrity & enthusiasm while replacing a roof for my mother. That job was flawless, was done under budget and took less time than expected. It is because of that first experience that I have used Keith's expertise over and over again since. Following a bad hail storm in 2021, after 2 other roofers presented fancy quotes, Keith came, inspected our roof and said he'd make it happen with our insurance claim. He walked through the process with us, was there to do the heavy lifting and was onsite to supervise the roofers as they worked. While the roof was being replaced, Keith noticed a few other issues with our home that he'd forgotten to mention in his estimate, and took care of them without any additional charges. Keith and his crew are polite and modest and really do a job that lasts!
We had several roofing contractors inspect our roof after a recent hail storm. Keith was the most professional and knowledgeable of them all. He worked well with our insurance company, was there for the insurance adjuster's visit to our home, and his friendly crew replaced our roof in one day! They did a thorough cleanup afterward. Keith also noticed a hail damaged gutter that needed replacing and took care of that also. He also replaced four hail damaged window screens at no charge. We would highly recommend Roof Authority LLC to anybody needing a hail damaged roof repaired or replaced!
Before the visit
Frequently Asked Questions About Flat Roof Installation
Still wondering?(720) 817-3348
Denver-metro market ranges from October 2026 put TPO and EPDM at about $4 to $15 per square foot installed, priced by measured roof area in squares, not living area. Those are market ranges, not this business's prices. Tapered insulation, drains, and flashing add to the scope, which is why a flat roof is priced from its own measurements rather than a per-square-foot guess.
Both work here. TPO seams are heat-welded into a continuous sheet and handle UV well; EPDM is a flexible rubber that holds up through freeze-thaw cycles. The choice depends on your roof's shape, the penetrations, and the slope plan — we walk the roof and recommend from what we see, not from a preference for one material.
Yes. Lakewood requires a permit before tear-off on any re-roof, pulled through the City's eTRAKiT system. The flat re-roof fee is $110 under Resolution R-2020-48 — verify the current fee with the City. We handle the permit and the City inspection for you.
Because the deck has no slope toward a drain. A flat roof needs tapered insulation or a built-in slope to move water off. If your roof ponds for days after rain, the slope is the problem, and a new membrane alone will not fix it. See our blog guide on why flat roofs pond water for the full picture.
Keep exploring
Other Roofing Services We Handle
Your next step is waiting
Talk Through Your Flat Roof in Lakewood
Ponding water, splitting seams, or a low-slope roof that has never drained right — call (720) 817-3348 and we will walk your roof, photograph the low spots, and give you a written scope.
Start with the basics
Contact Roof Authority LLC
Have a leak, storm damage, or a roof that needs a look? Call us at (720) 817-3348. We answer the phone during business hours, Monday through Saturday, 7:00 AM to 5:00 PM, and we are closed on Sundays.