DensGlass Installation Bay Area | Expert Exterior Sheathing in Gilroy & Northern CaliforniaAt Ron Hogan Drywall, we’ve been installing DensGlass sheathing across the Bay Area for over 55 years because it just works better in our crazy California weather. Family-owned since 1970, we know exactly how to handle the fog, rain, wind, and earthquakes that come with building here. Whether you’re adding a new home addition in Gilroy, wrapping a commercial building in San Jose, or doing a full exterior remodel in Fairfield, our crews install DensGlass the right way — fast, clean, and built to last.Not sure if DensGlass is right for your project? Get your free quote today or call/text us at (925) 791-9099. We’ll walk you through it with zero pressure.
What Is DensGlass Sheathing?DensGlass is a fiberglass-mat-faced gypsum board made by Georgia-Pacific. Think of it as the tough, modern upgrade to old-school paper-faced sheathing. The fiberglass mats on both sides make it extremely resistant to moisture and mold, while the gypsum core gives it real strength. We use it as the solid base layer on exterior walls before the siding, stucco, or whatever finish you choose.It comes in 1/2-inch for standard jobs and 5/8-inch Fireguard® when fire ratings matter — perfect for the wildfire zones we deal with in Northern California.
Why DensGlass Makes Sense for Bay Area Projects in 2026Our weather here is no joke: coastal fog in San Francisco, heavy winter rains in the North Bay, and wildfire risks almost everywhere. DensGlass handles all of it better than anything else we’ve used.Here’s why homeowners, builders, and property managers around Gilroy, Oakland, Walnut Creek, and beyond keep choosing it:
- Moisture & Mold Protection – Repels water and scores perfect on mold-resistance tests. No more worrying about rot behind your siding.
- Holds Up in Tough Weather – Can stay exposed up to 12 months if needed, but we always recommend getting it covered quickly during our rainy season.
- Fire Resistance – Fireguard® versions help meet the latest 2026 California Building Code requirements in high-risk areas like Sonoma or the East Bay hills.
- Seismic Strength – Stays stable during earthquakes and gives walls extra shear strength — exactly what we need on the fault lines.
- Long-Term Savings – Fewer call-backs, less maintenance, and it helps your project qualify for green building credits if you’re going for energy-efficient or net-zero builds.
How We Install DensGlass the Ron Hogan WayWe don’t cut corners. Every job follows manufacturer guidelines, local codes, and the real-world lessons we’ve learned in 55+ years of Bay Area construction.Our Straightforward Installation Steps:
- Prep the Framing – Make sure everything is plumb, level, and spaced correctly (16–24 inches on center) with proper seismic bracing.
- Cut & Fit Panels – We measure twice, cut clean, and dry-fit every panel so it sits perfect — even on those tricky angled walls we see in older Gilroy and San Jose homes.
- Fasten It Solid – Corrosion-resistant screws or nails every 6–8 inches on the edges and 12 inches in the field. We never overdrive them.
- Seal Every Joint – Fiberglass mesh tape and high-quality sealant keep water out where it matters most.
- Add Weather Barriers – We integrate the right WRB (weather-resistive barrier) and flashing so your entire wall assembly stays dry for decades.
- Final Check – We walk the job with you and make sure it’s ready for siding or stucco.
Bay Area-Specific Tips We Share With Every Customer
- Store panels flat and off the ground, covered, until we install them.
- We schedule around the weather — nobody wants to fight the rain in February.
- In wildfire-prone zones we automatically recommend the Fireguard® version and extra fire-rated detailing.
- Pairing DensGlass with good insulation and modern windows helps hit 2026 Title 24 energy requirements without extra headaches.
Why Choose Ron Hogan Drywall for Your DensGlass Project
- Fully licensed and insured (California CSLB #265709)
- Local family business since 1970 — we actually live and work here
- Honest pricing with no hidden fees
- Crews that show up on time and work clean
- We serve Gilroy, San Jose, Fairfield, Oakland, San Francisco, Brentwood, Union City, Walnut Creek, and everywhere in between
Frequently Asked QuestionsIs DensGlass good for our foggy, humid Bay Area weather?
Yes — it’s actually made for it. The fiberglass mats stop water and mold better than anything else on the market.
How long can it stay exposed before siding goes on?
Up to 12 months, but we recommend covering it within a couple of months during our wet season.Do you handle the full exterior wall assembly?
Absolutely. We can install DensGlass, WRB, flashing, and coordinate with your siding or stucco team.Is it more expensive than regular sheathing?
A little more upfront, but it saves money long-term by preventing problems and speeding up the job.
Ready to get started?Call or text us today at (925) 791-9099 or fill out the quick form for a free, no-pressure DensGlass quote. We’ll come out, look at your plans or your house, and give you straight answers and clear pricing.Let’s build something that will still look great in 2050.
Yes — it’s actually made for it. The fiberglass mats stop water and mold better than anything else on the market.
How long can it stay exposed before siding goes on?
Up to 12 months, but we recommend covering it within a couple of months during our wet season.Do you handle the full exterior wall assembly?
Absolutely. We can install DensGlass, WRB, flashing, and coordinate with your siding or stucco team.Is it more expensive than regular sheathing?
A little more upfront, but it saves money long-term by preventing problems and speeding up the job.
Ready to get started?Call or text us today at (925) 791-9099 or fill out the quick form for a free, no-pressure DensGlass quote. We’ll come out, look at your plans or your house, and give you straight answers and clear pricing.Let’s build something that will still look great in 2050.