Case Study: 9,820 SF Tear-Off and New Foam Roof — 42 W Boxelder Pl, Chandler
A 9,820 sq ft industrial roof at 42 W Boxelder Pl in Chandler — a 1981-vintage multi-tenant building in the College Park industrial submarket — got torn off to the deck and rebuilt from scratch. Vanguard removed and disposed of all existing roof layers, cleaned and primed the exposed deck, spray-applied polyurethane foam to level out the low areas contributing to ponding, sprayed a full 1" of new closed-cell SPF (+/- 1/8") across the entire 9,820 sq ft field including vertical wraps up every parapet wall, sealed every vent and pipe penetration with ArmorPutty and reinforcing membrane, and finished the whole roof under two coats of ARMORCOAT AC100 premium white elastomeric. Direct contract with the property management company. 10-year no-leak warranty on materials and labor.
Project Snapshot9,820 sq ft complete tear-off with a new spray polyurethane foam roof and 2-coat AC100 topcoat on a Chandler industrial building
42 W Boxelder Pl sits in the College Park submarket of Chandler — the working industrial corridor along West Boxelder Pl between Arizona Ave and McQueen Rd, north of the Chandler Airpark. The block is Chandler's original manufacturing spine: a run of 1970s and 1980s tilt-up and masonry industrial buildings serving small manufacturers, service contractors, distribution tenants, and product-assembly operations. The building at 42 W Boxelder Pl is a 9,675-rentable-SF single-story industrial building [built in 1981](https://www.commercialcafe.com/commercial-real-estate/us/az/chandler/) — 45 years old at the time of this project, which is well into the window where the original built-up roof system reaches the end of its useful life and a full tear-off becomes the right move.
9,820 SF Full Tear-Off & New Foam Roof — 42 W Boxelder Pl, Chandler
| Property | Multi-tenant industrial building in the College Park submarket of Chandler — 1981 vintage per [CommercialCafe leasing record](https://www.commercialcafe.com/commercial-real-estate/us/az/chandler/), ~9,675 rentable SF, typical of the West Boxelder Pl industrial belt |
| Address | 42 W. Boxelder Pl., Chandler, AZ 85225 |
| Building type | Single-story tilt-up / masonry industrial building with rooftop HVAC and parapet walls on all sides, part of a multi-tenant industrial block on West Boxelder Pl |
| Roof size | 9,820 sq ft of roof deck plus vertical parapet wraps |
| Roof system | Full tear-off of all existing roof layers followed by a NEW 1" (+/- 1/8") spray polyurethane foam roof over primed deck, ArmorPutty detail work at every vent and pipe, and 2 coats of ARMORCOAT AC100 premium white acrylic elastomeric topcoat |
| Scope | Remove and dispose of all existing roof layers; clean the roof deck; prime areas where needed; spray-apply polyurethane foam to large low areas to correct ponding; spray 2 passes of polyurethane foam edge-to-edge across the entire deck including vertical parapet walls (total 1" +/- 1/8"); seal all roof vents and pipes with ArmorPutty and reinforcing membrane; apply 2 coats of ARMORCOAT AC100 white acrylic elastomeric topcoat; clean up and dispose of all job-related debris |
| Contract | Direct with property management company |
| Neighborhood | West Boxelder Pl / College Park industrial submarket, Chandler 85225 — the working industrial block between Arizona Ave and McQueen Rd, north of the Chandler Airpark, part of Chandler's original manufacturing corridor |
| Warranty | 10-year no-leak (materials + labor) |
| Completion | July 2026 |
The ProjectThe building, the client, and what we were solving for
42 W Boxelder Pl sits in the College Park submarket of Chandler — the working industrial corridor along West Boxelder Pl between Arizona Ave and McQueen Rd, north of the Chandler Airpark. The block is Chandler's original manufacturing spine: a run of 1970s and 1980s tilt-up and masonry industrial buildings serving small manufacturers, service contractors, distribution tenants, and product-assembly operations. The building at 42 W Boxelder Pl is a 9,675-rentable-SF single-story industrial building [built in 1981](https://www.commercialcafe.com/commercial-real-estate/us/az/chandler/) — 45 years old at the time of this project, which is well into the window where the original built-up roof system reaches the end of its useful life and a full tear-off becomes the right move.
The property management company running the building brought Vanguard in to replace the roof. There was ponding at multiple low points, the existing membrane was past its service life, and the interior tenants below needed a durable long-warranty roof — not another patch cycle. The decision was to strip everything off, correct the ponding at the deck level with additional foam in the low areas, then build a fresh 1-inch spray polyurethane foam roof edge-to-edge including vertical wraps up every parapet, and lock it under two coats of ARMORCOAT AC100 with a 10-year no-leak warranty. That's what got installed. The photography tells the whole story — split-frame drone shots of the roof mid-tear-off with the original white cap sheet still visible on one half and the exposed deck on the other, ground-level shots of the crew cutting membrane in monsoon-season sunrise light, aerial views of the yellow un-topcoated new foam edge-to-edge, and the final bright white AC100 finish.
The SystemThe system: tear off everything, correct the ponding at the deck, then build a fresh 1" SPF roof with a 2-coat AC100 topcoat
This wasn't a recoat and it wasn't a scarify-and-re-foam. This was a full tear-off with a new foam roof built from scratch on the exposed deck. That's the right move when the existing membrane is completely past its service life and the deck itself has low spots contributing to standing water — the substrate needs to be exposed, primed where needed, corrected at the low areas with additional foam, and then rebuilt with a monolithic 1-inch SPF field that gives the roof a fresh full-thickness closed-cell insulation and elastomeric coating system carrying a full 10-year warranty.
- Full tear-off of all existing roof layers — every existing membrane layer, cap sheet, and any deteriorated insulation stripped off the deck and disposed of. The photography shows the split-frame view of the roof mid-tear-off with the original white cap sheet still on one section and the exposed wood-and-metal deck visible on the other.
- Clean the exposed roof deck — dust, adhesive residue, fasteners, and construction debris removed from the deck surface so the primer and foam bond cleanly to sound substrate.
- Prime areas where needed — deck primer applied to any section requiring it for proper foam adhesion, focused on the areas of the deck where the substrate condition warranted priming per the SPF manufacturer's spec.
- Ponding correction with additional foam at the low areas — before the main foam application, spray polyurethane foam applied specifically to the large low areas of the deck to correct ponding water where possible. The scope acknowledges upfront that some ponding may remain on a 45-year-old deck geometry — but the deep low spots got filled in first, giving the finished roof a more consistent slope-to-drain than the original substrate provided.
- Spray 2 passes of polyurethane foam across the entire 9,820 sq ft including vertical parapet walls — two passes of fresh closed-cell polyurethane roofing foam sprayed edge-to-edge across the deck and up every parapet wall vertically, for a total foam thickness of 1 inch (+/- 1/8") on the deck. The vertical parapet wrap eliminates the highest-risk edge detail on any flat roof by carrying the foam continuously up and over the parapet rather than terminating at the wall.
- Every roof vent and pipe sealed with ArmorPutty and reinforcing membrane — HVAC curbs, plumbing vents, gas lines, and every roof penetration wrapped with high-solids urethane putty and embedded polyester reinforcing membrane per ARMORCOAT detail spec.
- 2 coats of ARMORCOAT AC100 premium white acrylic elastomeric topcoat — first coat applied at spec across the whole 9,820 sq ft including the vertical parapet wraps, allowed to cure per the AC100 data sheet, then the second coat applied in cross-hatched direction for full mil thickness and uniform bright white reflectivity.
- Comprehensive site cleanup and debris disposal — all tear-off material, packaging, protective coverings, and construction debris removed from the site, dumpsters hauled, parking lots swept, and the property left clean for the multi-tenant occupants.
Our ApproachThe approach: staged tear-off around a multi-tenant industrial block with continuous business activity below
42 W Boxelder Pl is a multi-tenant industrial building on a working industrial block — the tenants below and the neighboring buildings on West Boxelder Pl kept operating throughout the project. Vanguard sequenced the tear-off in controlled sections so that at no point was the roof left with an unmanageable amount of deck exposed to weather. The tear-off proceeded from one side to the other with the crew visible in the ground-level photography cutting the old membrane back in strips, while the fresh-foam application caught up close behind so no section of open deck sat unprotected overnight. That controlled staging is what makes the difference between a tear-off that risks water intrusion on the tenants below during monsoon season, and one that doesn't. On this project, it didn't.
Vanguard's 8-step scope for the 42 W Boxelder Pl tear-off and new foam roof
- Remove existing roof layers and dispose — full tear-off of all existing membrane, cap sheet, and deteriorated insulation. Disposal handled off-site through a licensed C&D hauler.
- Clean roof deck of dirt and debris — the exposed deck cleaned of any construction debris, dust, adhesive residue, or old fasteners so the primer and foam bond cleanly.
- Prime areas where needed — primer applied to any deck section requiring it per the SPF manufacturer's spec for proper foam adhesion.
- Spray-apply polyurethane foam to large low areas — additional foam applied to the deep low spots on the deck to correct ponding water where possible. Some ponding may remain given the original deck geometry, but the deep depressions got filled in first.
- Spray 2 passes of polyurethane foam across the entire 9,820 sq ft including vertical parapet walls — two full passes of fresh closed-cell SPF across the whole deck and up every parapet, for a total foam thickness of 1 inch (+/- 1/8").
- Seal all roof vents and pipes with ArmorPutty and membrane — every HVAC curb, plumbing vent, and roof penetration wrapped and sealed with high-solids urethane putty and reinforcing polyester membrane.
- 2 coats of ARMORCOAT AC100 white acrylic elastomeric topcoat — first coat cured per manufacturer spec, then second coat applied in cross-hatched direction across the deck and vertical parapet wraps.
- Clean up and dispose of all job-related debris — dumpsters removed, protective coverings and packaging hauled off, parking lots swept, and the site left clean for the multi-tenant industrial operations continuing next door and below.
The finished aerial shows the outcome: bright white AC100 running edge-to-edge across the whole 9,820 sq ft, up and over every parapet wall, HVAC field cleanly detailed, and the ponding depressions largely leveled out into a much more consistent drainage plane than the original 1981 deck provided. The photography sequence from top-down before-tear-off, through the crew mid-strip on the exposed deck, through the yellow un-topcoated fresh SPF, into the finished bright white AC100 is exactly the kind of proof-of-work sequence that a property management company running multiple industrial buildings can show to owners and to future prospects.
The DetailThe detail: why a full tear-off and new foam roof was the right call on a 45-year-old industrial deck
Every commercial roof reaches a point where the maintenance math flips. On a 10-15 year old membrane roof with sound insulation below, a repair-and-recoat is usually the right call — fresh coating, re-detailed penetrations, another decade of service life at a fraction of a rebuild cost. But on a 1981 industrial building whose original built-up roof system had been through 45 Arizona summers, whose deck had settled into multiple ponding low spots, and whose membrane was past patchable — the maintenance math had flipped. Repair-and-recoat on top of a failing substrate just delays the inevitable and costs the tenants below every time the roof leaks in the meantime. A full tear-off and rebuild with a new 1" foam system resets the clock for 10-15 years and gives the property management company a genuinely new roof to manage against.
Spray polyurethane foam is the right rebuild chemistry for an industrial building of this vintage for two reasons. First, closed-cell SPF adds significant R-value on top of the existing deck — better insulation for the tenants below means lower HVAC load through Arizona summers. Second, SPF sprays as a monolithic seamless field with no fasteners and no seams, which is exactly what you want on a deck with multiple HVAC penetrations, drain openings, and vertical parapet walls all around the perimeter. The vertical parapet wraps are the specific detail that makes a foam-plus-elastomeric system outperform every other flat-roof chemistry in Arizona conditions: carrying the coating continuously up and over the parapet eliminates the traditional wall-to-roof detail where every other system historically leaks first.
The Warranty10-year no-leak warranty backed by an Arizona commercial roofer since 1957
The 42 W Boxelder Pl tear-off and new foam roof is covered by a 10-year no-leak material and labor warranty. If any covered part of the 9,820 sq ft roof surface — deck field, vertical parapet wrap, vent or pipe detail, or workmanship — leaks in the next 10 years, Vanguard returns to make it right at no cost to the property management company or the underlying property owner. Vanguard Roofing AZ is a division of MSW Contracting LLC, a Chandler-based Arizona commercial roofer serving Valley properties since 1957. AZ ROC CR-42 #289663 and R-62 #283025. GAF, Versico, ARMORCOAT, and MuleHide certified. A+ BBB rating. Reachable at (602) 818-5791 for warranty service and any follow-up maintenance over the life of the coating.
The ResultsThe results — a fresh monolithic 9,820 sq ft foam roof, ponding corrected, and 10 years of no-leak coverage on a 45-year-old industrial building
The before-and-after photography tells the whole story: a 1981 industrial roof with failing membrane and ponding low spots stripped back to the deck, corrected at the low areas with additional foam, rebuilt with 1 inch of fresh spray polyurethane foam edge-to-edge and up every parapet wall, and finished under two coats of bright white ARMORCOAT AC100 elastomeric — all without disrupting the tenants below or the neighboring industrial operations on West Boxelder Pl. The property management company gets a written 10-year no-leak warranty, a monolithic seamless roof with fresh R-value, and a cool-roof reflective surface that drops rooftop deck temperatures by tens of degrees on Arizona summer afternoons. When the 10-year recoat cycle comes back around, the next crew can pressure-wash and re-detail the existing AC100 and apply another two-coat pass directly on top — no tear-off, no substrate rebuild.
Photo GalleryProject photos
FAQCommon questions
Why was a full tear-off the right call at 42 W Boxelder Pl instead of a repair-and-recoat?
42 W Boxelder Pl is a 1981-built industrial building — 45 years old at the time of the project ([per CommercialCafe leasing record](https://www.commercialcafe.com/commercial-real-estate/us/az/chandler/)). The existing membrane was past its usable service life, and the deck had settled into multiple ponding low spots. A repair-and-recoat on top of a failing substrate just delays the inevitable — every time the roof leaks in the meantime, the tenants below take the disruption. A full tear-off with a new 1" foam roof and a two-coat AC100 topcoat resets the clock for 10-15 years, corrects the ponding at the deck level, and gives the property management company a genuinely new roof to manage against with a full 10-year no-leak warranty.
How is ponding addressed on a foam roof over an older industrial deck?
Before the main foam application, additional spray polyurethane foam was applied specifically to the large low areas of the deck to correct ponding water where possible. The scope acknowledges upfront that some ponding may remain on a 45-year-old deck geometry — the underlying deck slope was set in 1981 and no roof coating can fully recreate a positive slope-to-drain that the deck itself doesn't have — but filling in the deep depressions with additional foam gives the finished roof a much more consistent drainage plane than the original substrate. Silicone or foam pond correction with a rebuild pass is the standard Arizona commercial practice on older decks with settled low points.
Why does the foam get sprayed up the vertical parapet walls?
The wall-to-roof detail is the single highest-leak-risk detail on any flat commercial roof — it's where every membrane system historically fails first because it depends on a mechanical termination against the parapet wall. Carrying the spray polyurethane foam continuously up and over the vertical parapet walls eliminates that detail: the foam and the AC100 topcoat run monolithically from the deck field, up the vertical parapet, and over the top, with no seam and no mechanical termination between the roof surface and the wall. On a foam-plus-elastomeric system this is the specific detail that outperforms every competing chemistry in Arizona conditions.
How is 1" of foam thickness verified on a sprayed roof?
Spray polyurethane foam thickness is monitored and verified during application against the specification. The Vanguard spec for 42 W Boxelder Pl called for a total thickness of 1 inch (+/- 1/8") applied in two passes across the 9,820 sq ft deck. Two passes give the applicator control over final thickness — the first pass builds base coverage and the second pass fills to spec — and the tolerance of +/- 1/8" is standard closed-cell SPF industry practice reflecting how sprayed foam builds thickness across a real deck. Total foam depth was measured on the roof against the spec during application.
What warranty coverage does the finished Boxelder Pl roof carry?
The 42 W Boxelder Pl new foam roof is covered by a 10-year no-leak material and labor warranty. If any covered part of the 9,820 sq ft roof surface — deck field, vertical parapet wrap, vent or pipe detail, or workmanship — leaks in the next 10 years, Vanguard returns to make it right at no cost to the property management company or the property owner. Vanguard is a division of MSW Contracting LLC, an Arizona commercial roofer serving Valley properties since 1957 with an A+ BBB rating and AZ ROC licenses CR-42 #289663 and R-62 #283025.
What happens at the end of the 10-year warranty period?
A properly-installed AC100-topcoated SPF roof gives a Chandler commercial building a service life of 10-15 years to the next maintenance cycle, and 30-50+ years to the next full replacement. When the recoat cycle comes back around, the next crew can pressure-wash and re-detail the existing AC100 and apply another two-coat pass directly on top of the sound foam substrate — no tear-off, no substrate rebuild. That's the compounding value of building the roof on foam rather than a membrane system: the substrate installed today is the same substrate the next recoat cycle sits on.