Carlisle SynTec Roofing in Brockton, MA
Age gets blamed for most single-ply leaks. The sheet is usually fine. A splice failed, a flashing pulled loose, or a drain backed up. On a Carlisle SynTec roof in Brockton, MA, those details take the winter beating, so they get our first look. We find which one let go before anyone says the word replacement.
Carlisle SynTec makes commercial single-ply roofing. Its range includes EPDM rubber, TPO, and PVC membranes, along with insulation and accessories. The three sheets behave differently. EPDM joins with tape or adhesive. TPO and PVC join with heat welds. A repair that treats one like another is how repairs fail.
Name the sheet before choosing a method
A walk across the roof tells part of the story. EPDM is flexible rubber, usually black or white. TPO and PVC feel stiffer and often read white or light gray. Look-alikes exist, and a wrong guess burns a visit.
Where the owner allows, we cut a small core. It shows the sheet, the attachment, the insulation, and the deck. It also shows whether the roof is fully adhered, mechanically fastened, or ballasted, and each of those fails in its own spot. Adhered sheets let go at the bond. Fastened sheets let go where a plate backs out or the sheet flutters. Ballasted sheets let go where stone shifts and rubs the sheet below. The repair follows the failure, not the label.
Clean and test every splice we touch
Seams are the weak line of a single-ply roof. EPDM tape can pull when it went down over dirt or in damp air, and the lap lifts at the edge first. TPO and PVC welds fail when the surface was dusty or wet on the day. A weld can look fused and still hold nothing.
Our steps are plain. Clean the lap. Probe it along its full length for soft spots. Repair from sound material to sound material. Probe again after the repair cures. The lift you can see rarely matches the weak stretch, which runs longer, so we follow the probe.
Cold is the limit. Tape and adhesive need a dry, warm surface, and a frozen lap takes neither. In January we dry in the opening with a temporary patch, write it into the report as temporary, and make the permanent splice when the sheet allows it.
Rebuild the flashing where the sheet turns up
Walls, curbs, pipes, and drains are where single-ply roofs leak. The sheet turns up a vertical face and ends at a termination. Heat and cold move it, and sealant smeared over the gap hides the failure for one season.
We cut back to sound material, clean the substrate, and set new flashing with a mechanical termination at the top, then seal it. A cracked pipe boot gets replaced, not patched. A penetration flashing check covers every pipe and curb on the roof, not only the one over the stain.
A tall parapet needs its cap checked as well. A failed cap lets water behind the flashing, and the best new flashing cannot hold against water coming from behind.
Foot traffic wears these roofs along the path to each rooftop unit. We look for scuffs, cuts, and crushed insulation along that line and lay walk pads where the sheet has thinned. A technician who drags a hose across a lap can undo a good weld, and one dropped tool can open a split that lets in water for a whole winter, so the pads go down before the next service visit, not after the next leak.
Check attachment after a hard blow
Two regional storms explain the attention to attachment. In 1938 a hurricane put 186 mph at Blue Hill Observatory, and in 1991 Bob hit southeastern Massachusetts as a Category 2. Brockton's 14.3 mph average wind keeps edges under steady strain between those storms.
On a mechanically attached sheet, we count the fasteners along the edge and the corners and look for backed-out screws, torn plates, and a sheet that billows. On an adhered sheet we test the bond near the perimeter. Where edge metal is loose, we secure it before we touch the sheet. A wind damage repair starts at the edge and works inward.
Move the water before blaming the sheet
A pond on a single-ply roof finds every weak lap and pinhole. It adds weight, stays warm in summer, and freezes in winter. Brockton gets roughly 50 inches of precipitation a year, and snowmelt reaches the drains in a rush.
Walk the roof after rain or a thaw and see where water lingers. A pond that outlasts a day or two means a plugged drain, a low spot, or a sagging deck. A plugged scupper needs cleaning and a strainer. A low spot may call for a cricket or one more drain. A sagging deck needs a structural look. Clearing comes first, then marking the low area on the plan. Coating over a pond fixes nothing.
A visit for drains and scuppers before the first hard freeze costs little and heads off most January leaks.
Pick repair, recover, or replacement with a core in hand
A core and a moisture map decide. Dry insulation and a sound sheet point to repair. A dry roof with a worn sheet may take a recover, if the deck and layers can carry it. Wet insulation across sections points to replacement. Cutting into a recover over wet board only exposes the problem that the recover hid.
We price each path in lines: tear-off, insulation, access, weather hold. An owner in the Avon Industrial Park, where 127 firms operate beside Route 24, sees the same lines as the owner of a low-slope roof off Route 28. Replacement permits run under 780 CMR, the 10th edition state code, which rests on the 2021 International Building Code.
The same approach carries over to Versico, a Carlisle company, and Holcim Elevate. In Stoughton, where shoemaking left older brick and flat-roof industrial buildings, the core comes first on every roof.
Occupied buildings add limits of their own, and a clinic or an office asks for quiet hours and clean air at the intakes. We map intakes before any fume-producing work, close each opened section before the shift ends, and keep the pricing lines separate so an owner can swap a recover for a tear-off and see what changes.
Commercial Roofing Questions
Is a splitting EPDM seam a sign the roof is finished?
No. One failed seam is a seam problem. We probe the rest of the lap and the neighbors. If the sheet is sound, a new splice holds for years, and the report notes which laps were tested so the next visit does not repeat them. A pattern of failed splices across the field changes that answer.
Why do TPO roofs leak at welds?
Dust, moisture, or cold at the time of welding. The weld looks fused but is not. We re-weld from sound material and probe the whole length.
Can a patch go over an old patch?
Rarely. A stack of patches hides the real failure and adds edges. We strip back to clean sheet and start over.
What does a fastener problem look like?
The sheet flutters in wind, or ridges form along the fastener line. Plates can tear through. Those spots get new fasteners and plates.
How long can a temporary patch hold in winter?
Through the cold months, if it was done right. It is not the fix. We log it, label it as temporary on the plan, and make the permanent repair in a dry, warm window.