Sika Sarnafil Roofing in Plano, TX

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The April 21, 2017 hailstorm left Plano car dealerships with shattered glass and pocked inventory, and storms like it still send building owners up to check their roofs. On a Sika Sarnafil roof, the repair starts with the membrane itself and one practical question: are we cleaning a large area of weathered roof, or prepping an old seam for a new weld?

Those are two different jobs. For Sika Sarnafil work in Plano, we figure out which one we're doing before writing prep instructions. You should know what membrane is being joined, what shape the existing surface is in and what repair the crew will finish. A general "cleaning" allowance makes it hard to compare bids.

For a building like those at Collin College's Spring Creek Parkway campus, or any commercial roof in the city, we'd use the owner's roof records and inspect the damaged area, including any old repairs. Our recommendation separates surface prep on the existing roof from new installation and lists any curb or equipment work needed before the new flashing goes on.

Identify the task before the cleaner

Sika's seam-prep bulletin treats new seams differently from cleaning existing membrane. New seams generally don't need cleaner; loose dust just needs a clean, dry cloth. If a seam overlap is contaminated, Sika calls for SarnaRoof Membrane Cleaner 100, wiped dry. Cleaning the overall existing roof surface calls for a water rinse instead.

Our commercial roof inspection identifies whether the work is a seam overlap or a larger area of roof. We note the product and any dirt, contamination or coating we find. The prep follows the instructions for that job rather than stretching a seam method across the whole roof. You'll know what the cleaning line covers and why another area may need different treatment.

Keep aged material in the repair decision

The same bulletin calls for Cleaner 100 to prep aged Sika membrane before repairs or before flashing new curbs and pipes with hot-air welding. That means we have to know the existing material and its condition before planning the repair. We note old patches and any coating that affects prep, and the repair area stays separate from a general description of the whole roof.

Our commercial roof repair scope shows the prep around the damage and the welded patch or flashing that will close it. If an old patch is made of something we can't identify, we explain the testing needed before choosing the final method. You'll see where confirmed work stops and what question controls the rest of the quantity. A small hole shouldn't hide an unresolved problem at the edge of the repair.

Review the product behind a membrane alternative

When another membrane is offered alongside Sika, we compare its own materials and installation requirements. Prep for one system stays with that proposal. We don't borrow one manufacturer's method for another product just because both are single-ply. Each bid keeps its products and details clearly labeled so you can see the full job behind each price.

A Carlisle SynTec system is one alternative we can price. We show the prep each membrane needs where it meets the existing roof, along with any change to repairs or curb work. If a product is swapped during planning, we review the installation method again. You can follow the choice through prep and installation instead of getting the old scope with a new membrane name.

Prepare the curb before the new flashing

A new or modified curb has to be checked before roofing ties into it. We look at the backing, where the curb meets the roof and the flashing detail we'll use. If the curb needs repair, we note who does it and when. Cleaning old membrane is only part of the job; it doesn't fix a rotted curb that the new flashing has to seal to.

For larger public buildings like the Plano Municipal Center on K Avenue, existing roof and equipment records would guide the review. Our rooftop equipment curb and support work covers curb prep before the aged membrane gets new flashing. We photograph the curb repair before it's covered. You'll know what the roofer needs from another trade and what's included in the flashing price.

Separate surface work from concealed removal

If the repair depends on what's under the membrane, that question is handled separately from cleaning. We recommend testing if we don't know whether insulation can stay. A clean surface doesn't tell you anything about wet insulation underneath. Tear-off depth and new insulation quantity follow what we found at that spot, and any undecided boundary stays flagged until it's checked.

A Johns Manville assembly can be priced as another option. Each shows the material staying, the tear-off and the new construction separately. If opening the roof changes what we expected, we explain the new quantity before covering it up. You can compare methods based on the work underneath, rather than assuming cleaning solves a problem below the membrane.

Keep preparation findings with installed details

We record the membrane, cleaner and flashing products used at each work location, with photos of the surface before the seam or flashing is finished. If a material question changed the prep or the size of the repair, that finding stays with the change. The closeout describes the work done, including any curb or equipment work handed off to another trade.

For Downtown Plano buildings and elsewhere, a later inspection can start from a clear record. A new pipe or another patch can be matched to the materials and methods already used there. You'll also have a plain explanation of the finished repair, with the prepped area and kept material marked, rather than a vague "roof cleaning" entry.

Commercial Roofing Questions

Why does it matter whether you're prepping a seam or cleaning the whole roof?

Because Sika's instructions are different for each. A contaminated seam overlap gets Cleaner 100 wiped dry, while the overall existing surface is cleaned with a water rinse.

What do you check before repairing aged Sika membrane?

The membrane, any old patches and the surface condition where the repair will bond. If an old patch material is unknown, we settle that before choosing the prep method.

How do you compare a different membrane with Sika?

Each product keeps its own prep and installation requirements. We show any change to repairs or flashing details behind the alternative price.

Does cleaning the membrane finish the flashing at a new curb?

No. The curb itself has to be checked and repaired if needed, and we confirm who does that work and when before the new flashing is welded.

How do you keep cleaning separate from tear-off in the scope?

Findings about the insulation and any tear-off quantities are listed separately from surface prep. Any area still waiting on testing stays flagged until it's checked.