A commercial roof inspection in Rosemead gives an owner, buyer or manager a clear picture of what the roof is, what condition it is in and what it will need over the next few years. We walk the full roof, check every drain and penetration, take core samples when the owner allows, and deliver a photo condition report with priorities and a written repair quote kept separate.
Inspections are one of our commercial roofing services for the San Gabriel Valley, and they are often the first step before a repair or reroof.
When a commercial roof survey is worth booking
- Before buying a building, ideally inside the due-diligence period so findings can shape the price.
- Before signing or renewing a lease that assigns roof costs to the tenant.
- When a lender or insurer asks for roof age, system type and condition.
- After a wind event or a heavy storm, to document damage while it is fresh.
- Each fall and spring as part of routine upkeep.
- Before adding solar or new rooftop equipment, so the roof's remaining life matches the project.
Buyers in particular should not rely on a general building inspection alone. Those reports often note a roof from the ladder and move on, while a low-slope roof's real condition is in its seams, flashings and insulation.
What does a commercial roof condition report cover?
| Area | What we look at |
|---|---|
| Membrane or surface | Seams, blisters, splits, granule loss, coating wear, ponding marks |
| Flashings | Parapets, coping, curbs, pipe boots, pitch pockets, skylights, roof edges |
| Drainage | Drains, strainers, overflows, scuppers, conductor heads, gutters, downspouts |
| Insulation and layers | Core cuts or a moisture survey to find wet areas and count existing roofs |
| Underside | Deck rust, rot, staining and sagging where the ceiling is open |
| Rooftop equipment | Curb height, condensate lines, debris from service work, unflashed additions |
The report includes an overview, a roof plan with numbered findings, a photo for each one, an estimate of remaining service life, and priorities grouped as now, this year and plan ahead. Repair or replacement pricing comes as a separate written quote, so the report reads the same whether you hire us or not.
How our commercial roof inspection visit runs
- Records first: you send any roof plans, past reports, warranties and permit history you hold.
- Inside walk: we note stains, ceiling damage and, where the deck is exposed, rust or rot from below.
- Roof walk: membrane, seams, every flashing and penetration, logged on a numbered roof plan.
- Drainage test: strainers pulled, lines checked for flow, ponding marks measured.
- Moisture check: core cuts with your approval, or a meter or infrared survey without opening the roof.
- Report: photos, remaining-life estimate and priorities, with any repair quote sent as a separate document.
Commercial roof inspection in Rosemead: timing and turnaround
Most visits are booked same-day or next-day when crews are free, and many small buildings are walked in an hour or two. Large warehouses take longer, and a moisture survey by infrared scan has to happen just after sunset on a dry, sunny day, when wet insulation shows up warmer than dry areas.
We confirm the report delivery date when we book, based on roof size and the tests involved. To keep the visit efficient, have roof hatch keys ready, let tenants know someone will be on the roof, and pull any old roof warranties, permits or prior reports you have.
Need commercial roof inspection help this week?
Tell us what you are seeing. We schedule same-day or next-day visits when crews are free and send photos with a written quote.
- 4.9 from 48 Google reviews
- Based on Rosemead Blvd
- Photos and a written quote before work
What happens if the inspection finds problems?
Each issue gets a priority. Active leaks and failed flashing at curbs go in the now group. Worn seams, minor blisters and clogged overflows usually fall into this year. Membrane aging and roof replacement go into the plan-ahead group with an approximate year.
You can use the report to request a credit in a purchase, budget the work in a reserve plan, or hand it to any roofer for bids. If you want us to make repairs, we quote them separately. Small items such as clearing a drain we can often handle during the visit with your approval. Larger industrial roofs have their own considerations, covered on our warehouse and industrial roofing page.
Who pays for the inspection, and who gets the report
Whoever orders the inspection pays for it, and we quote the fee when you book. In a sale that is usually the buyer. Sellers sometimes order one before listing so there are no surprises. Under a lease, the owner, the tenant or both may order it, depending on who carries roof costs.
What sets the inspection fee
Roof area, the number of buildings, and how the roof is reached all move the fee: an interior hatch is quick, a lift on a tall warehouse is not. Core cuts, an after-dark infrared survey and a report written to a lender's or insurer's format each add time, as does a tight contingency deadline.
Insurers may request inspections for underwriting, but the cost usually stays with the policyholder. After storm damage, we document what we see and can meet the adjuster on the roof. We do not negotiate the claim; California licenses public adjusters for that role.
The report goes to the person who ordered it. With their permission we send copies to a lender, broker, board or tenant.
Permit history, Title 24 and license checks in a roof report
Permit records help date a roof. We suggest pulling them from the city's building division, or from LA County Public Works Building & Safety for unincorporated sites, and the report notes where they disagree with what we find. We also flag where a future reroof of half the roof or more will trigger Title 24 cool-roof values, so the budget reflects a white membrane in Climate Zone 9.
Lenders often order an ASTM E2018 property condition assessment, which is visual by design; a roof-specific report adds cores and moisture mapping. Whoever does the repairs later needs a CSLB C-39 license for jobs over $1,000, which anyone can verify at cslb.ca.gov.
Why managers and buyers book Tylzen Spoke for roof surveys
- Findings are photo-documented and tied to a roof plan, not written as vague notes.
- Reviewers say we explain options plainly and do not pressure anyone into work.
- Our 48 Google reviews averaged 4.9 stars as of November 2026, and several mention clear written findings.
- Short drives from Rosemead Blvd to most of the valley's commercial districts.
If the roof has a manufacturer warranty, the report notes its system and any conditions we can see that could affect coverage. Workmanship terms on repairs we do are written into that contract. Regular commercial roof maintenance visits build the record most warranties expect.
We inspect commercial roofs in Arcadia, Temple City and City of Industry, among others. Buyers can also work through our commercial roof inspection checklist before the visit.
What customers say on Google
4.9★ from 48 Google reviews (checked Nov 2026)
“i had a bad roof leak that ended up causing a ceiling leak inside the house, but the whole experience turned out great with tylzen spoke roofing. grant called me back quickly after i left a message and came out the very next day to inspect the roofing issue. …”
“After a large tree fell on my home in Rosemead, I was referred to a few roofing companies for a roof repair and replacement estimate. The team was very easy to work with around my travel schedule, and they arrived exactly on the day and time set for the roof inspection. …”
“the roofing team did an outstanding job with our roof replacement. even though the timing wasn't ideal for us, as we were selling our house, they really helped make everything go smoothly. tanner came out to inspect the roof after a big storm and then worked closely with our insurance adjuster. …”
Where we handle commercial roof inspection
- Rosemead
Strip centers and small offices changing hands, where layered roofs hide wet insulation that only a core cut reveals.
- Arcadia
Office and medical buildings along Huntington Drive that need condition reports for leases, refinancing and insurer renewals.
- Temple City
Las Tunas Drive storefronts with older flat roofs, where buyers want remaining-life estimates inside their contingency period.
- City of Industry
Large warehouse roofs where infrared moisture surveys cover acres of membrane faster than core cuts alone.
- South El Monte
Industrial buildings with skylights and metal laps that lenders and insurers ask to have documented before closing.
- San Gabriel
Restaurant and retail roofs on Valley Blvd, where inspections check for grease damage around kitchen exhaust fans.
- Commerce
Distribution buildings changing tenants, where triple-net leases make the roof's condition a cost question for both sides.
- Monterey Park
Shopping centers and office buildings on Atlantic Blvd that schedule fall and spring surveys before and after the rains.
- Altadena
Commercial buildings near the Eaton Fire area that need post-fire roof documentation, permitted through LA County Public Works.
Commercial Roof Inspection questions
What is in a commercial roof condition report?
An overview of the system and its age range, a roof plan with numbered findings, a photo of each finding, the remaining service life we estimate, and priorities grouped by urgency. Pricing for any repair or replacement comes as a separate quote so the report stays neutral for lenders, buyers and boards.
Should I inspect the roof before buying a commercial building?
Yes. A low-slope roof can look fine from the hatch while the insulation below is wet. A pre-purchase inspection with core cuts or a moisture scan shows what you are taking on, and the findings can support a price credit or repair request inside your contingency period.
How often does a flat commercial roof need inspecting?
Twice a year works for most buildings: once in fall to clear drains before the November to March rains and once in spring to look for storm damage. Add an inspection after strong winds, after new equipment goes on the roof, and before signing a lease that assigns roof costs.
Do you need to cut into the roof?
Only with the owner's permission. A core cut is a small sample that shows every layer and whether insulation is wet. We patch each cut the same day. If the owner prefers no cuts, an infrared or meter survey gives a good picture of moisture without opening the roof.
Can a tenant order a roof inspection?
Yes, though the tenant needs the landlord's permission for roof access under most leases. Tenants often order one before a lease is signed or renewed, especially under a triple-net lease where they may carry repair costs. We send the report to whoever ordered it.