Modified Bitumen Roofing in Shreveport, LA
Modified Bitumen Roofing as a Recover Over Aging Membrane
Modified bitumen shows up constantly in our recover work across Shreveport-Bossier, mostly because it lays down well over the existing gravel-surfaced built-up roofs that cover so much of the legacy manufacturing stock in this market. A granulated cap sheet installed over a properly prepped existing roof gives you a durable, walkable surface without the cost and disruption of tearing the old roof out first.
Why So Much Older Shreveport Stock Is a Good Candidate
Manufacturing buildings from the 1970s and 80s, and some of the older medical and office properties near downtown, were built with multi-ply asphalt roofs designed for a long service life with periodic maintenance rather than replacement. When those roofs reach the point where patching no longer keeps up with new leaks, modified bitumen recover is often the most cost-effective next step, because the existing insulation and deck are usually still in serviceable shape underneath the wear layer.
We confirm that with a moisture survey before quoting anything, since a recover over a wet deck just buries a problem instead of solving it.
Torch-Applied Versus Self-Adhered Systems
Torch-applied modified bitumen uses an open flame to melt the modified asphalt backing and bond the sheet to the substrate, which gives a strong, consistent bond but requires careful fire-safety protocol on an occupied building. Self-adhered systems skip the torch entirely, using a peel-and-stick backing that's a better fit for buildings where an open flame anywhere near the roof isn't acceptable - which describes most of the occupied casino and medical properties we work on. We'll recommend the application method based on your building's occupancy and any fire-watch requirements your insurer has in place.
Granulated Cap Sheet and Foot Traffic Durability
A lot of the buildings we service have rooftop mechanical equipment that gets serviced regularly, which means the roof surface takes real foot traffic year-round. Granulated cap sheet modified bitumen holds up to that kind of repeated technician traffic better than a smooth membrane, and the granule surface also adds a layer of UV protection that extends the sheet's service life through Shreveport's long, hot summers.
What a Modified Bitumen Recover Job Involves
- Moisture survey across the existing roof to confirm dry insulation and deck
- Removal of loose gravel and any blistered or delaminated sections
- Base sheet or new insulation layer where slope correction is needed
- Cap sheet installation, torch-applied or self-adhered based on building requirements
- Flashing and detail work at all penetrations, curbs, and perimeter edge metal
Close-out documentation includes photos of the prep work and finished detail areas, which matters if you're managing this roof as one property in a larger portfolio and need a record for the file.
Ponding Water and Drainage on Older Low-Slope Roofs
A common problem on aging built-up roofs is drainage that's degraded over decades of minor deck settlement, leaving low spots where water sits for days after a storm. Modified bitumen recover gives us a chance to correct slope with tapered insulation in those areas rather than just laying a new membrane over the same drainage problem. If your roof has known ponding spots, tell us before the site walk so we can plan for the correction in the scope.
Scheduling Torch Work Around Casino and Medical Building Hours
A number of the properties where modified bitumen recover comes up in Shreveport-Bossier operate around the clock - casino floors, hospital wings, production lines that never fully shut down. Torch-applied work requires a fire watch and coordination with your building's fire alarm and suppression systems, which we set up with your facilities or life-safety staff before the crew ever lights a torch. On buildings where that coordination is more complicated than the schedule allows, self-adhered modified bitumen sidesteps the issue entirely, which is often the simpler answer for a facility that can't accommodate open-flame work windows.
Where a roof has already been recovered once with modified bitumen, matching the new cap sheet's granule color and surface type to the existing installation can also matter for both appearance and how the roof reads during future inspections - a mismatched patch is easy to mistake for a failure area from a distance. We keep track of what's already on a building when we've worked on it before, and we ask about prior roofing history on buildings we haven't, so the new work integrates cleanly with what's already there.
Common Questions About Modified Bitumen Roofing
Can modified bitumen go directly over our existing built-up roof?
In most cases, yes, provided a moisture survey confirms the deck and insulation are dry.
Is torch-applied modified bitumen safe on an occupied building?
It can be done safely with proper fire-watch protocol, but on occupied casino or medical buildings we typically recommend self-adhered systems to avoid the open flame entirely.
How long does a modified bitumen cap sheet typically last?
Service life varies with exposure and maintenance, but a properly installed and maintained system holds up well through repeated Louisiana summers when flashing details are kept in good condition.
Can this system fix our ponding water problem?
Often, yes - tapered insulation installed as part of the recover can correct drainage in known low spots.
Does modified bitumen handle rooftop mechanical foot traffic well?
Yes, granulated cap sheet is one of the more traffic-tolerant membrane surfaces available, which is part of why it's common on buildings with active rooftop equipment.