Commercial Roofing in Katy: Flat and Low-Slope Roofs Explained
Business roofs fail differently than homes. Here is what owners and managers in Katy should know about low-slope systems, hail and upkeep.
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How a low-slope roof is different
Most commercial buildings use flat or low-slope roofs. Water moves slowly across them, so drains, scuppers and the seams of the membrane do the work that pitch does on a house. When one of those fails, water ponds and looks for the weakest seam.
Leaks also travel. On a house, a stain usually shows up close to where water got in. On a flat roof, water can run along the deck and through the insulation, so the drip inside may be far from the opening above.
Single-ply membranes such as TPO and EPDM are common on these roofs, each with its own seams and repair methods. Our guide to TPO vs. EPDM roofing compares the two. Metal is another option on many commercial buildings.
Common trouble spots on commercial roofs
Ponding water
Water that sits after rain adds weight and speeds up wear on the membrane.
Open seams
Heat and movement work seams loose, and they are the usual entry point for leaks.
Drains and scuppers
Leaves and debris block them fast. See flat roof drainage systems.
Flashing at walls and curbs
Where the roof turns up a wall or around a unit, the flashing takes the most stress.
Rooftop equipment
Service traffic around units punctures and scuffs the surface over time.
Aging membrane
Sun exposure leaves older sheets brittle, with cracks that open wider in each storm.
Hail and flat roofs in the Katy area
A flat roof faces hail head-on. NOAA's Storm Prediction Center logged 20 hail reports within 10 miles of Katy from 2015 through 2024, including 6 at 1.75 inches or larger. The top size was 2.5 inches, on May 9, 2019.
On a membrane roof, hail can crush the insulation board underneath or puncture the sheet without leaving a mark you see from the edge. Rooftop units, vent caps and metal edges dent and loosen. After a storm with large hail, walking the full roof surface is the only way to know what happened. Our hail damage roof repair in Katy page covers the documentation side.
How a commercial roof assessment works
Records first
We ask for the roof age, past repairs and any leak log you keep.
Full roof walk
Seams, flashing, drains, edges and rooftop units are checked and photographed.
Inside check
Ceiling stains and wet tiles are matched to the areas above them.
Written scope
You get a clear list of repairs or a replacement plan with photos, so decisions can be made with the owner or the board.
A simple maintenance routine
Walk the roof after major storms and note any change.
Clear drains, scuppers and gutters of leaves and debris.
Check seams and flashing around rooftop units.
Keep foot traffic on set paths so the membrane is not worn down.
Log every leak with the date, location and weather. A commercial roof maintenance plan keeps this organized.
Repair, restore or replace
Some roofs need a seam repair. Others have wet insulation across large areas and need replacement. The guide to signs a commercial roof needs replacement helps sort that out, and work can be planned to reduce business disruption.
GemSco handles residential and commercial roofing, is fully licensed and insured, and gives free estimates. Learn about our commercial roofing service or our work in Katy.
Frequently Asked Questions
How do I know if my flat roof has hail damage?
Look for dents on metal edges, vent caps and rooftop units, and for spots on the membrane that feel soft or cracked. Many hits only show as crushed insulation under the surface. A roofer can walk the roof, mark suspect spots and photograph them, and core samples can confirm what is underneath.
Can a leaking commercial roof be repaired instead of replaced?
Often, if the problem is limited to seams, flashing or a few punctures and the insulation is still dry. If water has spread through the insulation in large areas, repairs tend to fail and replacement is usually the better choice. An inspection tells you which case you are in.
Can roof work be done while my business stays open?
In many cases, yes. Work can be phased by section and scheduled around business hours, with access paths and material staging planned ahead. Talk through your operating needs during the estimate so the plan fits how the building is used.
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