Sika Sarnafil PVC roofing in Berkeley, CA: split corners, failed patches and welded flashing repairs, with the membrane and substrate checked before welding.
Roofing Manufacturers | Berkeley, CA
On a hotel's PVC roof, a corner flashing has split right under an earlier patch. Before welding anything, we need to know what the membrane is and what the old patch is made of, because not every patch material will take a weld. Sika Sarnafil roofing in Berkeley, CA starts with that. We check the membrane, the corner and the insulation underneath. On hotel roofs, we also plan around guest rooms and rooftop equipment. The Sika name doesn't make every old repair compatible. The proposal names the membrane and accessories and covers any substrate work needed for a lasting fix.
Sika Sarnafil work starts with the specific building and the problem area. We look at the corners and nearby details with the building manager before anything is opened or ordered. A split patch can let water into the insulation around it, so we test before deciding what stays. Records can help identify the membrane that's on the roof, but we confirm on site. The installation follows Sika's current requirements. Our recommendation is based on what's actually on your building.
Sika makes PVC membranes under both the Sarnafil and Sikaplan names. Each has its own accessories and details, so we confirm which one is on the roof. We compare any records with the membrane we can see at the problem area. If the old patch is a different material, it may have to come off before a new weld will hold. A smooth PVC surface doesn't prove every repair on it is compatible. Sika's requirements for that membrane set the prep and welding method, and the proposal says which product is installed and which is being proposed.
If you're comparing Sika Sarnafil with Duro-Last, each needs its own membrane and detail parts priced for the same roof area. We include the same substrate repairs and flashing work in both. The same square footage doesn't make accessories interchangeable. Products are confirmed before ordering. A lower membrane price can leave detail work out. Having membrane on hand doesn't mean the insulation underneath can stay. A good comparison shows what each option would actually finish.
Water entering at a split corner can soak insulation well beyond the visible crack. We mark suspect areas separately from confirmed wet insulation. Wet material is removed and replaced, and the estimate covers both. New PVC won't dry insulation that stays in place. Fasteners or adhesive holding the insulation may also need checking. Records may not show later work. The proposal confirms which insulation is staying and which is being replaced, so the new membrane goes onto a dry, solid base.
A commercial roof inspection before a Sika Sarnafil repair compares the membrane and equipment details with available records. Confirmed repairs are listed separately from areas that still need testing. If more damage turns up when the roof is opened, it's measured and approved before we keep going, and the roof stays temporarily sealed in the meantime. A narrow split doesn't tell you how much insulation is wet. A stain inside doesn't either. The scope follows what testing actually confirms.
PVC membrane and flashings are joined with hot-air welding. Sika's requirements for the specific membrane and accessories set the method. Both surfaces have to be clean and compatible before welding. Test welds and probing the cooled seam check the new work, but they don't tell you anything about the insulation underneath. A prefab corner on site won't fix wet insulation or a bad curb height. We list membrane compatibility, substrate condition and weld checks separately, so the finished corner is sealed with the right product.
On a PVC roof, the repair plan states the exact membrane and accessories being used. We match the new detail to the existing sheet. Attachment and welding are listed separately. A good weld doesn't confirm the insulation below. Products are confirmed before ordering. Being ready means substrate, flashings and membrane are all on site. If a rooftop unit is in the way, that has to be sorted out before the corner can be finished. The repair is complete when the corner is properly built and welded.
New insulation raises the roof surface, which can leave less flashing height at an equipment curb. We measure curb heights against the planned roof before ordering parts. If curbs need to be rebuilt, it's in the scope. Comparing Sika with Holcim Elevate PVC means reviewing each system's accessories separately; similar membranes don't share parts. Both options should include the same substrate repairs and the same protection for occupied rooms. The proposal shows what changes in the finished detail with each system.
If a rooftop unit has to be lifted to reach the split corner, the mechanical contractor handles it, scheduled before the roof is opened. Tight delivery routes can add handling and protection. If guest rooms below can only be cleared at certain times, work is split into phases and sealed between them. A membrane price doesn't capture any of that. Being ready means substrate repairs, flashings and membrane are on site and the equipment trade is booked. The estimate includes the steps needed to get the corner ready to weld.
Sika Sarnafil roof work across Berkeley and Emeryville depends on identifying the installed membrane and its welded details. Institutional and hotel buildings often have equipment and access limits we plan around. In downtown Berkeley, each roof gets its own inspection. Details we couldn't finish stay listed with the responsible trade. A new field membrane doesn't mean every corner is done. The installed membrane and accessories are recorded by location, so the closeout shows exactly how far our work went.
The closeout record lists the Sika membrane and accessories installed at the corner, with photos of substrate repairs, prep and the finished welds. Weld tests and other agreed checks are included. Areas we didn't open are noted as not inspected. If a Sika warranty was offered, compare its terms with the installed system. The Sika Sarnafil name doesn't make a contractor authorized or guarantee coverage. Maintenance staff should keep the repair locations and membrane type on file for future work.
Send any membrane records and the location of the repair. We'll inspect it and explain the fix with photos.
Request a Roof Assessment
