(954) 560-3015
Howard J. Foster, founder of HF Diverter Company, holding an HF Diverter with the ocean behind him
Howard J. Foster
Founder & Inventor
Meet the Founder

39 years fixing the same problem. So I engineered the fix.

I’m Howard Foster. After almost four decades watching South Florida’s sliding doors fail the same way every storm season, I stopped waiting for the building products industry to solve it. I designed a better solution, patented it, and started this company to put it in the hands of the people who actually need it.

39+
Years in S. Florida
1
U.S. Patent
500+
Units Protected

How One Recurring Problem Became a Patented Product

For nearly four decades I worked South Florida’s coastal buildings. Condos, single-family homes, oceanfront properties, mid-rise complexes — the kind of work where you see what fails, what holds up, and what just doesn’t get talked about. One thing came up over and over again: the sliding glass door.

Not the glass. Not the frame. The track. Specifically, the bottom track — where wind-driven rain finds its way in through the drain holes during every major storm. Weatherstripping fails within a year. Caulk cracks. Track adjustments fade after a single hurricane season. And the result is always the same: water on the floor, ruined flooring, drywall damage, and eventually mold.

I watched property after property go through the same cycle. Owners would have the doors recaulked. Then the weatherstripping replaced. Then the rollers adjusted. Then — when nothing else worked — they’d be told the only real fix was to replace every sliding door in the building. We’re talking $8,000 to $15,000 per door, or over a million dollars for a typical condominium. And here’s the absurd part: even the brand-new replacement doors would still leak the next storm season. I saw it happen, more than once.

By 2023, I was fed up. I’d spent decades doing temporary fixes for what was clearly a permanent problem in how sliding doors were designed. So I went into the workshop and started engineering a solution myself — a plastic track insert that would block the water at the source, custom-fit to any door, and that would also reinforce the door against forced entry as a bonus. After enough prototypes and storm-season testing, I had something that actually worked.

I filed for the U.S. patent in 2023. HF Diverter Company opened its doors in 2024 with one product, one mission, and one promise: stop slider water intrusion permanently, without forcing anyone to replace doors that are otherwise fine. That’s it. Same problem I’ve been watching since the 1980s — finally solved.

“

I got tired of telling people their only option was to spend a hundred thousand dollars on doors that would leak again next season. So I built something better.

HF
Howard J. Foster
Founder, HF Diverter Company
HF Diverter plastic track inserts ready for installation

Patented Engineering. Not a Workaround.

The HF Diverter isn’t a stopgap or a generic accessory. It’s a purpose-built piece of marine-grade polymer engineering, designed specifically for South Florida’s storm conditions and protected by a U.S. patent.

U.S. Patent Filed and granted on the dual-purpose track insert design — water diversion plus security reinforcement in a single component.
Marine-Grade Polymer Engineered to handle salt air, UV exposure, and decades of South Florida coastal weather without degradation.
Custom-Fit Manufacturing Each diverter is fabricated to the exact track dimensions of the door it’s protecting — no off-the-shelf compromise.
Tested Through 2024 Storm Season Validated in the field across hundreds of installations. Zero water damage claims post-install across the customer base.

South Florida Born & Based.

I live and work in South Florida. That’s not a marketing claim — it’s where I’ve spent my entire career, and it’s why this product was designed for the specific conditions this region throws at sliding doors every year. For building audits and on-site assessments, I personally serve four counties:

  • Broward County
  • Palm Beach County
  • Miami-Dade County
  • Martin County
Outside South Florida? The HF Diverter ships nationwide for DIY installation — you measure your door, we build it custom and ship it ready to install. Order online here.
Headquarters

Plantation, Florida

HF Diverter Company is headquartered in Plantation, Florida — central to the South Florida coastal corridor we serve and close to the buildings that need this product most.

Founded 2024
Service Area Radius 4 Counties
Product Shipping Nationwide
Phone (954) 560-3015

Working With Me Means Something Specific

I’m not a national franchise. I’m not a call center. I’m one guy who built one product and stands behind it personally. Here’s what that means for you.

I Answer the Phone

When you call (954) 560-3015, you get me — not a script, not an answering service. If I’m in the field I’ll call you back the same day.

Custom-Built, Per Order

Every diverter is fabricated to your specific door dimensions after you order. No off-the-shelf compromise, no “close enough” sizing.

Building Audits, In Person

For property managers and HOA boards in South Florida, I personally walk the building, assess the sliders, and present to the board. Not a sales rep — me.

1-Year Warranty Backed by Me

Every install carries a 1-year workmanship warranty. If anything goes wrong in the first year, you call me and I make it right.

What Customers Say

★★★★★

“Having had enough of the northeast winters, we moved into our ocean-front condo in 2021. I was nervous about hurricanes — but since installing HF diverters, not a drop of rain has come in. Additionally, the diverters have given us an added layer of security.”

RC
Resident
Ocean-Front Condo, 2021
★★★★★

“I live in an ocean-side building. Even after new storm windows and doors were installed, we had water seepage on our floors. When most owners had HF diverters installed, this was an instant problem solver! No more leaks!! Highly recommend.”

OC
Owner
Ocean-Side Condominium
★★★★★

“I originally purchased it to protect from water and sand intrusion, but it then became a security feature that solved my concern over how easily someone could break in from the patio door.”

SF
Homeowner
South Florida

Have a Question? Just Call.

The fastest way to get a real answer is the phone. I’d rather talk to you for five minutes about your specific door than have you guess from a website.

Ready to order? Visit the homeowners product page or read about the building program for HOAs & property managers.