Most flat roof leaks get patched, not fixed. WeldLab Roofing locates the actual source through moisture scanning and membrane-level diagnostics, then executes the right repair. No guesswork. No repeat failures.
The same leak coming back after two contractor visits is not a roof problem. It's a diagnosis problem. Here's what we hear most often.
"We've had two contractors patch it. The leak came back both times."
Patches fail because the actual moisture source was never found. WeldLab runs a non-invasive scan to map where water has entered and spread through the roof assembly, before recommending any work.
"Our board needs a clear answer, not a contractor's verbal estimate."
WeldLab inspects the full roof system, identifies the actual problem through moisture scanning and membrane evaluation, and gives you one clear recommendation grounded in evidence. Designed for governance and capital planning, not a sales call.
"I don't know whether to repair or replace. No one has given me real data."
Repair vs. replace decisions should be made on moisture saturation data and membrane condition, not guesswork. Our technical analysis gives you the evidence to make a cost-justified decision with confidence.
We work exclusively on flat and low-slope roofing systems, TPO, PVC, and membrane assemblies. No generalist roofing. Every engagement begins with a expert flat roof inspection and ends with real repair work.
Targeted repairs to actual failure points: seam failures, penetration flashings, parapet caps, drain components, membrane punctures. Scope validated through moisture scanning before any work begins.
Rapid response to active leaks, storm damage, and winter events. Stop interior damage immediately. Temporary membrane coverage, drain opening, and ice dam mitigation. Full repair follows after stabilization.
Repairs, preventive maintenance, and capital replacements for HOA boards, condo associations, and commercial property managers, with the technical depth to support budget approval and capital reserve planning.
Full tear-off and replacement when the data supports it. Scope includes deck inspection, insulation assessment, new membrane installation, all flashings and edge metal, priced on Xactimate, no guesswork.
Every WeldLab engagement begins with a expert flat roof inspection. No assumptions. No "I've seen this before" patches.
We review your property, roof system type, and primary concerns before arriving on-site, so we arrive with the right equipment and ask the right questions.
⏱ 15 to 30 min call
On-site inspection with non-invasive moisture detection, membrane evaluation, drainage analysis, and penetration review. Findings documented in real time.
⏱ 1.5 to 3 hrs on site
WeldLab tells you exactly what the roof needs: repair, maintenance, stabilization, or replacement. One clear answer grounded in moisture data and membrane condition. No menus. No tiers.
⏱ Delivered same day
WeldLab executes the recommended work, targeted repairs, emergency stabilization, preventive maintenance, or full replacement, priced on Xactimate, no inflated anchor numbers.
⏱ Scheduled on your timeline
We work exclusively on flat and low-slope membrane systems: TPO, PVC, modified bitumen. No steep-slope, no general roofing, no diluted expertise. Specialization is the service.
We understand how lakefront proximity, freeze-thaw cycling, and regional building systems affect TPO seam performance, drainage patterns, and membrane longevity across North Side and North Shore properties.
WeldLab inspects the roof, interprets the evidence, and tells you exactly what it needs. Repair, maintenance, or replacement. One answer grounded in moisture data and membrane condition. No tiers, no upsell packages.
Our recommendations are based on moisture data and condition findings, not on maximizing job size. If repair extends the roof's useful life, we say so. We don't recommend replacement until the data supports it.
Know What Your Roof Needs Before Spending Anything
WeldLab inspects every roof with moisture scanning and membrane-level diagnostics, then does the work: repairs, maintenance, emergency stabilization, or full replacement. Expert inspection. One clear recommendation.
No long-term contracts. No sales pressure. Diagnosis before recommendation, always.
WeldLab Roofing serves Chicago's North Side lakefront corridor and the North Shore, from Lincoln Park and the Gold Coast through Edgewater and Rogers Park, and north through Evanston, Wilmette, Winnetka, Glencoe, Highland Park, Lake Forest, and beyond.
