Rapid Commercial Roof Leak and Damage Repair in Simi Valley
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YEARS OF EXPERIENCE AS ONE OF THE MOST RELIABLE Commercial ROOFING COMPANIES IN SIMI VALLEY, CA
When a commercial roof fails, it can disrupt your business and damage valuable inventory. Our crews are experts in commercial leak detection for flat and low-slope systems. Because we understand local Simi Valley codes, we prioritize minor repairs that fall under the 100-square-foot permit-free limit, allowing us to stabilize your facility immediately. We address common commercial issues like failed HVAC penetrations, membrane punctures, and drainage blockages, providing durable fixes that keep your business operational.
Commercial Project Tip: While many minor repairs under 100 square feet do not require a permit in Simi Valley, a full commercial re-roofing project involves a multi-stage inspection process with the city. We handle the entire permitting and inspection workflow to ensure your building meets current safety and Title 24 energy codes. You can view the full
GreatWay Roofing is an established and trusted Simi Valley roofing company that provides only the very best in craftsmanship and service. When you need a new roof, roof repair, or commercial roofing services, GreatWay Roofing is the company you can count on.
We conduct our Simi Valley Roofing business in a manner that elevates how roofing contractors are perceived by individual homeowners and commercial clientele alike. Customer service is paramount at GreatWay Roofing Company.
GreatWay Roofing
4518 Industrial St
Simi Valley, CA 93063
(805) 523-2550
Beyond the Membrane: Understanding Commercial Leaks
Many “roof leaks” on commercial buildings are actually caused by non-roofing components:
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Debris in Drains: When drains are clogged, water pools on the roof, creating excessive weight loads and forcing water through the smallest imperfections.
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Equipment & HVAC Platforms: Leaks often originate at the ducting platforms or where HVAC units are mounted rather than the membrane itself.
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Aging Skylights: Failed seals around old skylights are a frequent source of water intrusion.
View all Commercial and Residential Simi Valley Roofing Services.
If the damage is too extensive, we recommend Simi Valley Commercial Re-Roofing.
Protect your assets with our Commercial Inspection & Maintenance plans.
CALL US TODAY FOR A FREE, NO-OBLIGATION ESTIMATE!
MINIMUM ROOFING REQUIREMENTS
Listed here is a breakdown of the minimum roofing requirements based upon the most common existing roof coverings for Simi Valley.
Categories:
Asphalt Shingle:
Tile:
Low Slope:
# of Layers
Max layers = 2
Max layers = 1
No addl. layers permitted
Added layers may require Engineer’s Report
Plywood
Use existing
Replace as needed
Use existing
Replace as needed
Use existing
Replace as needed
Min. Felt
Underlayment*
ASTM D226 Type I 15#)
30# recommended
ASTM D226 Type II (30#)
40# recommended
Not Applicable
Min. Fire
Rating
Class-A Min.
Class-A Min.
Class-B Min.
Recommended Class-A
Color Restrictions
**No Restrictions**
**No Restrictions**
**No Restrictions**
Max. Weight
**6lbs. Per sq. ft. Over 6lbs. Requires Engineer’s Report**
**6lbs. Per sq. ft. Over 6lbs. Requires Engineer’s Report**
**6lbs. Per sq. ft. Over 6lbs. Requires Engineer’s Report**
*Roofs with a slope of less than 4:12 require a minimum of 2 layers of a 15lb. ASTM D226 Type I felt underlayment.
REVIEWS
WHAT OUR CLIENTS ARE SAYING
Tim and Brandon sent updates at every step including pictures of their work in real time.
We are very pleased and have contracted them for another property.
Highly recommend.
The price was great (as much as it can be for a roof, no small purchase), and the crew was really fantastic. They were professional and got the work done quickly. They had to put sheathing on my roof, since it’s old and didn’t have any underneath (!), and the whole project still only took 4 days.
For me, the best thing was that the crew cleaned up every day. The yard was clear, and there were no nails or debris hanging around. It’s a little thing that was really nice to see— it was really nice to go outside in the afternoon and not worry about stepping on anything/ having that peace to move around in the middle of a project.
I’d recommend this company to anyone.
This company is a class act and I am so pleased to have picked GreatWay Roofing who kept me informed thru email and sent photos as the project was moving ahead.
Great customer service, knowledgeable courteous workers and a satisfied customer says it all
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