New TPO Over Tapered Insulation
On a tear-off, we lay tapered boards toward the drains, add cover board, and fasten or adhere new white sheet with welded laps.
TPO Roofing
Tolleson TPO Roofing Contractor
As a TPO roofing contractor in Tolleson, we install, replace, and repair white TPO roofs on distribution, cold-storage, and retail buildings, with hot-air welded seams and insulation sized to the space below.
- Hot-air welded seams
- White sheet for desert sun
- Insulation sized to the building
- Sections phased around docks
Fit Check
Is Your Roof Ready For TPO?
TPO goes on low-slope decks. These lists show when a roof is ready for it and when something else comes first.
Good Fit
- Low-slope deck with drains, scuppers, or gutters that work
- Insulation that tests dry, or wet areas small enough to replace
- Long open runs between parapets or expansion joints
- Rooftop units that can be lifted or flashed in place
- A building that gains from a reflective surface in summer
Fix First Or Choose Another System
- Deck damage or sagging bays that hold water
- Wide areas of wet insulation under the old roof
- Sloped roofs better served by standing-seam metal
- Heavy grease exhaust that needs extra protection at the vents
- Two roof layers already on the building
TPO Problems
Where TPO Roofs Fail In Tolleson Heat
Welded TPO holds up well in the West Valley. Leaks on a TPO warehouse roof start at these five spots.
Gap at a weld lap
Likely Cause
A cold weld from the original install, or a lap that was never cleaned before welding.
What We Do
Probe the full run, cut out the weak weld, clean the sheet, and weld a cover strip over it.
Wet ceiling under an exhaust fan
Likely Cause
Membrane flashing pulled away from the curb corner as the unit vibrated.
What We Do
Reflash the curb with new base flashing and corners, and seal the counterflashing at the top.
Split at a parapet corner
Likely Cause
Sheet that shrank, or was pulled tight into the corner with no relief.
What We Do
Install a new corner patch and wall flashing, and re-terminate the sheet under a new bar.
Ponding rings around a drain
Likely Cause
A drain set high, or insulation crushed by foot traffic around it.
What We Do
Reset the drain sump with tapered insulation and confirm the clamp ring seals the membrane.
Fastener plates showing through
Likely Cause
Plates backing out on a mechanically attached roof with a weak or damp deck.
What We Do
Check deck pull-out, add fasteners or replace plates, and weld new strips over the area.
TPO Options
TPO Roof Work For Tolleson Buildings
Four ways we handle a TPO job, picked after the inspection.
Tear-Off And Replace
Wet insulation and failed sheet come off in sections, the deck gets checked and repaired, and each section is closed before nightfall.
Recover Over A Dry Roof
When cores show dry insulation and the building has room for another layer, new TPO goes over cover board without a full tear-off.
Seam And Detail Repair
Open laps, loose corners, and tired curb flashing on a newer TPO roof get cleaned, welded, and patched with matching sheet.
Repair Or Replace
Repair It Or Put On A New TPO Roof?
Compare your TPO roof against both columns before deciding.
| Roof Factor | Repair The TPO | New TPO Roof |
|---|---|---|
| Seams | A few open laps in one area | Weld failures across many runs |
| Sheet surface | Smooth and weldable after cleaning | Chalky, cracked, or refuses a weld |
| Insulation | Dry under most of the roof | Wet in large sections |
| Roof age | Well inside its service life | Near the end of its 20 to 30 years |
| Drainage | Drains work after clearing | Low areas that need new taper |
| Operations | A short visit over one zone | A planned sequence of zones |
Before You Call
Planning A TPO Reroof This Year?
A core cut and a look at the deck tell us whether your TPO job is a recover or a tear-off, which changes the plan for your docks.
What To Have Ready
- Square footage or building drawings
- Current roof type and age
- Leak locations and dates
- Units due for replacement soon
- Any cooler or freezer areas below
TPO Process
How A TPO Roof Goes On
Five steps take a Tolleson roof from inspection to welded, closed sections.
Step 1: Inspect Your Roof
We core the roof in several spots, scan for wet insulation, and check the deck, drains, and every curb so the TPO plan matches what is under the old sheet.
Step 2: Prepare The Deck
Wet boards come out, damaged deck gets repaired, and tapered insulation goes in where water used to sit near drains and along parapets.
Step 3: Lay And Fasten Sheet
White TPO rolls out over cover board and is fastened or adhered to suit the deck, with laps lined up so each weld runs straight.
Step 4: Weld And Flash Details
Hot-air welders close every lap, then curbs, pipes, drains, and walls get membrane flashing welded to the field sheet and probed.
Step 5: Probe And Hand Over
Each weld is probed, drains are cleared, and you get photos of the laps and flashings along with care notes for the units above your space.
Related Services
Other Roof Work On Tolleson Buildings
Two services that often come up alongside a TPO roof.
Industrial Roofing
When the TPO roof sits over a plant or distribution center, the work adds walkway pads, lockout planning, and phased zones.
Industrial roofing in Tolleson
EPDM Roofing
Older buildings crowded with pipes and curbs sometimes take EPDM better than TPO, since the rubber sheet flexes with a moving deck.
EPDM roofing in TollesonQuestions
Questions For A Tolleson TPO Roofing Contractor
Is TPO a good choice for a Tolleson warehouse roof?
In most cases, yes. White TPO reflects much of the summer sun, and its welded seams handle the long, flat runs on West Valley distribution buildings. Pair it with thicker insulation over refrigerated space, and match the membrane thickness and attachment to roof traffic and the deck below.
What thickness of TPO do you install?
That choice follows how the roof gets used. A roof with frequent service traffic to rooftop units gets a thicker sheet and walkway pads, while a quiet storage roof with few units needs less. We name the thickness in the estimate so you can compare it against other bids.
Mechanically attached or fully adhered TPO?
Mechanically attached TPO suits big steel-deck warehouses and goes down quickly. Adhered sheet fits decks that hold fasteners poorly, or areas where plates under heavy foot traffic are a concern. The deck pull-out test during the inspection decides which one we recommend.
Can TPO go over my existing roof?
Sometimes. If cores show dry insulation and the building has a single roof layer, a recover with cover board and new TPO stays within code. Wet areas still come out first, so the new sheet never traps water above the deck.
How do you weld seams in the summer heat?
Hot-air welders are set for the sheet and air temperature, and we run test welds each morning and again after midday to confirm settings as the deck heats up. Summer work starts early to keep people and fresh sheet out of the worst afternoon heat.
Will a white roof lower my cooling costs?
A light-colored sheet can lower rooftop surface temperatures on triple-digit afternoons. How much that changes the cooling bill depends on the insulation, the units, and what the building stores, so we avoid promising a number and price the options side by side.
Next Step
Talk To Us About Your TPO Roof
Send the roof size and leak history, and we'll plan the inspection around your docks and coolers.