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JR Weiss

World Trade Center Below Grade Waterproofing

By case studies

Surface Applied Waterproofing Case Study

World Trade Center Below Grade Repairs

New York, USA

below grade waterproofing

World Trade Towers – Surface Applied Waterproofing using Krystol T1 and T2

negative side waterproofing

World Trade Towers – Surface Applied Waterproofing using Krystol T1 and T2 tunnels


The New World Trade Center Transportation Hub is just one of five new buildings which will make up the improved vision of downtown New York. Sustainable commercial space, convenient transportation, and a destination cultural center are all attributes which have been balanced gracefully within the new rebuild of the World Trade Center to symbolize the resilience and renaissance of not only New York – but of the entire country. This vision also unites an unprecedented merging of architects, artists, and urban developers, including Santiago Calatrava, David Childs, Norman Foster, Frank Gehry, Daniel Libeskind, Fumihiko Maki, and Richard Rogers. The singular goal is a grand new urban center for 21st century New York, and promises to become the most recognizable site in New York. Even esteemed projects such as these buildings are not without their hurdles. Located in lower Manhattan, two blocks from the Hudson River, the buildings are in a flood zone. The 9A Underpass and North Extension commuter passages, were experiencing what many below-grade concrete structures face – water infiltration. Leaking concrete cracks, damp areas and water penetration through joints were becoming increasingly hazardous to this area used by hundreds of thousands of commuters every day, due to its location adjacent to the new Freedom Tower. Many products were applied to attempt to mitigate the water damage. The problems were found to have been caused by failed external sheet membranes, and due to blind side application, they were impossible to access in or to replace or repair. Injection systems were attempted to address the leaking cracks and persistent damp areas, with results proving only temporary, while costing thousands of dollars in additional labour.


Greg Maugeri and Billy Della Sorte of Dry Concrete personally assessed the problems the passages were facing. Through countless early morning site visits, the Dry Concrete team performed trials and provided support and technical expertise. As long time Kryton distributors, Dry Concrete has a strong familiarity with the Krystol Cracks Repair System, and through their experience, could confidently recommend it as a permanent solution to the leakage problems. After demonstrating the performance of the products on a wall of one of the passageways, the project’s decision makers agreed with Dry Concrete’s recommendation. The Krystol Crack Repair System was the only concrete repair solution that was able to stop the leaks and return the problem areas to a dry state. Approved by both the Downtown Design Partnership (DDP), and the Port Authority of New York and New Jersey (PATHNYNJ), the Krystol Crack Repair System went to work, effectively sealing the leaking cracks, while providing permanent protection against high ground water pressure. The proprietary chemicals used in the Krystol products will only get more effective at preventing water penetration over time. These chemicals lie dormant throughout the life of the concrete structure, reacting with any present moisture to create hair like, permanent crystals which stop any water from entering the structure.  

Wacker Neuson ST-45 Compact Track Loader

By Announcements

Wacker Neuson ST-45 Compact Track Loader

Wacker Neuson ST45 Track Steer Loader


Wacker Neuson’s first entries in the crowded North American skid steer loader market include two skid steers and two compact track loaders powered by a 74-hp Perkins Tier 4 Final diesel engine with maintenance-free exhaust after treatment. All units feature standard two-speed transmission and are available in both H-Pattern and ISO joystick pilot controls.

ST 35: radial-lift compact track loader; 3,500 lb. rated operating capacity; 125 in. lift height
ST 45: vertical-lift skid steer; 4,500 lb. rated operating capacity; 134 in. lift height
Hydraulically driven fan operates only as needed, allowing faster engine warm-up times and reduced noise.

Wacker Neuson ST-45 Summary

The ST 45 vertical lift compact track loader delivers high operating capacity and extended lift height, making it ideal for digging and loading. The ST 45 delivers 4,500 pounds of operating capacity at 50% and a lift height up to 134 inches. The machine is powered by a 74.3 hp turbo-charged Perkins Tier IV Final engine. The ST 45 is available in both H-Pattern and ISO joystick pilot controls. The ergonomically designed controls and pressurized cab provides comfort and visibility, reducing operator fatigue and increasing productivity.

  • Standard two-speed transmission reduces travel time on job sites giving the operator more time throughout the day to get more tasks completed.
  • Spacious extended cab maximizes room and comfort for the operator to move inside the cab.
  • Optional high flow hydraulics increases the range of usable attachments improving efficiency and productivity.
  • Quick and easy service access from the forward tilting cab and the arrangement of internal components makes it easy to maintain this machine.
  • Hydraulically driven fan operates on an as-needed basis allowing faster warm-up times of the engine and significantly reducing noise.

 Rental Rate on Wacker ST-45 – $400.00 daily,  $1,200.00 Weekly,  $3,600.00 monthly

Rental Charges are based on an 8 hour day, 40 hour week, 160 hour month. Double shift rates are 1.5X the single shift charge, triple shift rates are 2X the single shift charge. Items marked with an “F” are subject to extra pick up and delivery charges. Routine maintenance (such as changing oil and filters) is the Renter’s responsibility. Call Gamka for items not listed, our rental inventory does fluctuate!

Purchase Price of Current unit in stock – Wacker ST-45 – 5200015597 5* ST45 Skid Steer,Vertical CTL (Compact Track Loader), Comfort Cab, ISO-Pattern Controls, Universal Skid Plate is $59,750.00 + inbound freight, dealer prep, taxes, and bucket.

Technical specifications

ST 45

Operating data

Height top of ROPS 82 in
Overall length w/ bucket 144 in
Overall length w/o bucket 116 in
Height Hinge Pin Max 134 in
Operating weight 10,245 lb
Rated Operating Capacity 50% 4,500 lb
Rated Operating Capacity 35% 3,150 lb
Length of track on ground 63 in
Dumping height at max height 107.1 in
Tipping angle (Bucket dump) w/bucket at max 38 °
Ground clearance 9.5 in
Width w/o bucket 78 in
Width track 17.7 in

Engine / Motor

Engine / Motor Turbo-Charged Perkins 854 Tier 4 Final
Engine performance 74.3 hp
Tank capacity Fuel 24.3 US gal

Hydraulic system

Auxiliary Hydraulics- Standard Flow 22.5 US gpm
Auxiliary Hydraulics- High Flow 36 US gpm
Pressure Aux. relief 3,338 psi

Power transmission

Travel speed Low 4.3 mph
Travel speed High 8.7 mph


Standard components

  • Vertical Lift Arm
  • Perkins, 4 stroke, 74.3HP turbo charged diesel engine, Tier 4 Final compliant
  • 17.7 in- (450mm) wide Bridgestone tracks with 1,000 hour prorated warranty
  • Rexroth ® Hydrostatic Pump and drive motor
  • Available in H-Pattern or ISO Controls joystick pilot controls
  • 2-Speed transmission with top speed of 4.3 mph (low-speed) and 8.7 mph (high-speed)
  • Spring-applied, hydraulic released wet-disc parking brakes
  • Hydraulic universal skid steer quick-hitch system for attachments
  • Front Auxiliary Hydraulics with flat face couplers
  • Arm Float Position
  • Adjustable spring suspension comfort seat with seat belt
  • Foot and Manual Throttle
  • Front and Rear work lights
  • ROPS Level I compliant canopy
  • Lexan Safety Roof
  • Back up alarm
  • 12-Volt Power Accessory
  • Seat Belt
  • Isolated Pressurized Cab*
  • Automotive style HVAC system*
  • Easy-to-Access side windows*
  • Radio-Ready

*Available on Cab units only


  • Hydraulic Coupler
  • Enclosed Pressurized Cab, Heat, Air Conditioning
  • Engine Block Heater
  • One Way Hydraulic Bucket Leveling
  • Ride Control
  • Radio
  • Adjustable High Flow
  • 14 Pin Front Electric Attachment Control


NJLCA Recognizes Bob Hibler of Gamka Sales

By Announcements

NJLCA Recognizes Bob Hibler of Gamka Sales

On December 17th, 2013, the NJLCA Recognizes Bob Hibler of Gamka Sales with a Certificate of Appreciation in recognition of his valuable contributions as the Chairman of the Board of the New jersey Landscape Contractors Association and serving the NJLCA Board of Directors from 2010 through 2013.

Gamka Sales is proud of Bob Hibler and his tremendous dedication to helping an association that is focused and committed to Landscape Contractors throughout New Jersey and the Green Industry as a whole.


NJLCA Recognizes Bob Hibler of Gamka Sales

Bob Hibler Appreciation Award by NJLCA 2013

NJLCA Recognizes Bob Hibler of Gamka Sales

Bob Hibler Appreciation Award by NJLCA 2013

Gamka Sales Co. Inc. sells and rents construction equipment to contractors and municipalities. We provide Husqvarna outdoor power equipment and products to landscapers, contractors, tree surgeons, property managers, arborists and homeowners for their lawn, shrub, garden, and tree maintenance requirements.


New Jersey Landscape Contractors Association

New Jersey Landscape Contractors Association

The New Jersey Landscape Contractors Association is a group of professional landscape contractors dedicated to advancing the integrity, proficiency and continued growth of the landscape industry. As an NJLCA member you receive valuable information and benefits indispensable to the ongoing success of your business.

How Do We Help You?
The NJLCA is a proven resource to both the landscape professional and consumer. As members, qualified landscape contractors offer a variety of services from planning and design to installation and maintenance which are oriented to the needs of each client.

For more information on this great association or to join please click here.

New Jersey Landscape 2014 37th Annual Trade Show and Conference

The New Jersey Landscape Contractors Association proudly announces their 37th Annual Trade Show and Conference, New Jersey Landscape 2014, on Wednesday, February 26, 2014. The Meadowlands Exposition Center in Secaucus, NJ will once again be the site for this one day Green Industry marketplace and educational event. NJ Landscape 2014 will feature over 150 companies showcasing their newest products, equipment, machinery and services. A DEP program will be coordinated, while additional business related seminars will also be offered.  For additional information call 201-703-3600 or visit

Racing Mowers, Chainsaws Massacring Trees

By Announcements No Comments

Racing Mowers – Chainsaws Massacring Trees

Racing Mowers, Massacring Trees with Chainsaws and Stuffing Faces at the Gamka Sales Husqvarna NJLCA Open House July 14th, 2011

Edison, NJ, July 25, 2011— A large group of landscapers, arborists, tree and snow removal service companies, nurseries, members of the New Jersey Landscape Contractors Association, property managers and contractors involved in grounds keeping converged at Gamka Sales Company’s World Headquarters in Edison, NJ on July 14th to eat, meet and compete all evening.

The Open House was sponsored by Husqvarna. Their full line of equipment for landscapers, tree surgeons and snow removal services was on display as well as Wacker Neuson’s wheel loader, excavator and dumper machinery. It was a night to demo products and most of those who attended were seen kicking tires, revving engines, and trying out the machines on hand. Gamka’s showroom was packed with items and their 60,000 sq. ft. warehouse was wide open for the Special 5 Cent Guided Tours conducted by Gamka staff. Many visitors had not been aware that besides Husqvarna, Gamka distributes other products used by landscapers including compaction equipment, filter and stabilization fabrics, diamond saw blades, trench drain and over 40,000 other line items. Gamka has a complete service and repair department with 12,000 parts on hand for the products it sells and Gamka rents 1,700 pieces of construction equipment.

The gathering included a business meeting for the New Jersey Landscape Contractors Association but the usual agenda of greeting, eating, meeting and hearing the topic of the day was scrambled when the big barbecued hot dogs and hamburgers came out and people decided that the two contests to test the skills of operators was going to be really fun and first up. The meeting part would wait. For the groundskeepers, there was the Husqvarna Zero-Turn Lawn Mower Timed Obstacle Course Challenge. The participants with the fastest course times were awarded trophies with the champion racer winning a “Green”, one person transportation unit, AKA a Trek Model 820 21 speed mountain bicycle. That lucky contestant was NJLCA member Eric Jepsen of Wayne Jepson Landscaping in Raritan, NJ. For the arborists, tree surgeons and anyone else wanting to give it a shot, there was the Husqvarna Chainsaw Tree Massacre Competition. Using a chainsaw, contestants had to take two slices off a log as quickly as possible. The one with the fastest time of all was NJLCA member Steve Smorong of Dobra Property Maintenance in Colonia. He won a brand new Husqvarna chainsaw.

The outdoor event ran late but the race track and chainsaw logging areas were lit up like daylight with light towers supplied from Gamka’s rental fleet.

When all the contestants had completed their tries for the gold, a brief NJLCA meeting was opened for New Jersey Landscaper Contractor Association business, a concise seminar on the “Evils of Ethanol”, followed by presentation of the awards and door prizes.

By the end of the night everyone admitted to being stuffed with food, all left with some kind of a souvenir or prize and attendees agreed it was a night they would remember.

Bob Hibler

Gamka Wacker Neuson Concrete Trowel Challenge 2010

By Announcements No Comments

Wacker Neuson Concrete Trowel Challenge

The Great Gamka Wacker Neuson Ride-on Concrete Trowel Challenge, November 3, 2010

By Bob Hibler, Marketing Czar at Gamka Sales Co., Inc.

The allure of beer, brats and the competitive nature of members of the concrete industry brought a large crowd to Gamka Sales Company’s World Headquarters in Edison, NJ in the afternoon of November 3rd, 2010 for the Great Gamka Wacker Neuson Concrete Trowel Challenge. The big draw was to see and hear the grand prize custom Wacker Neuson ride-on trowel to be awarded at the World of Concrete in Las Vegas next February. The CRT48-35VX is loaded with chrome and sports straight pipes, loud enough at 125 dB(A) to make most Harley Davidson motorcycle riders envious. So…what is the Concrete Trowel Challenge? The Concrete Trowel Challenge began as a simple contest between friends one year at World of Concrete. They used the demo concrete slab poured in Wacker Neuson’s outdoor booth in Las Vegas at World of Concrete and maneuvered a ride-on concrete trowel through an obstacle course to see who was the fastest finisher. The fastest operator to scoot through the obstacle course will be crowned the fastest finisher, winning the customized trowel.

 Wacker Neuson Concrete Trowel Challenge

At Gamka World HQ there was a good mix of contractors, concrete finishers, labor representatives and contractor association administrators in the group, all of whom were there to get a “taste” of this prequel to the Las Vegas grand finale.


Attendees walked though a gauntlet of Wacker Neuson equipment on display in the yard and right by the outdoor barbecue with the broiling brats, especially imported for the occasion from Wisconsin. Inside the warehouse there was more equipment to see and a long table laden with the fixin’s for the brats, beer and beverages. More Wacker Neuson small equipment was on display near the registration table where everyone who signed in received a custom Wacker Neuson Concrete Trowel Challenge tee-shirt, hat, free entry to the 2011 World of Concrete and a chance to scope out the trophy table for the top finishers in the timed obstacle course.


The actual Challenge was run in the six bay indoor truck loading area. Contenders were below the spectators who had a bird’s eye view of each contestant as he or she raced against the time clock.


As each rider mounted his concrete trowel, they would nail the throttle and jam the sticks forward as the judge shouted, “Go!”. The racers were required to go around the rectangular course first and then do a double U-turn inside before rounding the back half. A one second penalty was added to their score for every traffic cone touched or wall scraped. The look of concentration on the contestant’s faces was clear to all as the sparks flew off the trowel blades spinning at well over 100 RPM. At the conclusion of each run the rider’s elapsed time was entered into a computer to be projected on a big screen along with the name and company affiliation of each participant. As each score was entered the screen would be updated by rank. All this enhanced the rivalry among the Challengers and the spectators saw numerous reruns by operators who want to have their best time posted. Shortly after 7:00 pm the last man finished his run and the winners were announced. In first place was Joe DaSilva of A-Tech Concrete with an incredible timed run of just 28.5 seconds. As Top Gun, Joe was awarded a gift card to TGIF. In a very tight second place was Andrezy Niedzialek of AJS Masonry with a score of 28.68 seconds, so close! In third place was David DaSilva of A-Tech and also Joe’s brother, with a time of 29.16 seconds. Andrezy, David and eight more participants all received Gamka 2010 Concrete Trowel Challenge trophies. All who ran the obstacle course got a Wacker Demo Truck mini-model as a memento of the spectacle and their part in the race against the clock. Every attendee got their fill of hot brats, beverages, noise and excitement.


It was a cool November day but the action was hot. Look for a repeat next year! 


Gamka Construction World

By Announcements

Gamka Construction World

Construction: Your world, my world, OUR world. Love it or leave it, it is what it is. Gamka Construction World. Gamka has been in it for over 25 years; I have been part of it for almost twice that. An old Caterpillar salesman once told me you get infected, “I got yellow paint in my veins,” he said, “and it don’t come out.”

Gamka logo

Gamka Sales Co. Inc.

We are in a cyclical economy. The money in the construction pipeline keeps us going after other industries slow and shut and we start up later because the money to get going again takes awhile to flow back. Still, we go through this every 7 to 9 years. Boom, bust, boom, bust.


This bust is a big one and most of us, those of us who are still in the game, have diversified to get more of what little there is out there. Gamka has always specialized in concrete applications. Until recently. As you have noticed (we certainly did), there are not a lot of concrete slabs being poured or anything else. We became the Wacker Neuson distributor of Compact Class wheel loaders, Mini-excavators and Dumpers for most of New Jersey. Why? Different markets, different work, more opportunity. We did the same for the line of Husqvarna landscape, tree and snow removal products. Was this original? No. The survival instinct in us all took over. You, our contractor customers, have been doing the same, bidding different work, working other territories.


The economy sucks, to be blunt, but we have been here before and will be again. “All” it takes is hanging on, hanging in, tightening the belt and doing what it takes, whatever that is.


So this blog is part of diversifying. Gamka has joined the Social Media Revolution. You have too or you would not be reading this. We are in FaceBook, LinkedIn and, God help us, we Tweet. It is all part of reaching out. Now we blog.


What have you done to make it through so far? What gripes you? What works? Bitch if you want, preach to the choir or whomever, just share.


Let’s blog together!


Bob Hibler

Blogger Czar of Gamka


By Announcements No Comments



Edison, NJ, April 14, 2011— Gamka Sales Company was recently named as the Husqvarna Group’s newest New Jersey Distributor. The Husqvarna Group is the world’s largest producer of outdoor power products including chainsaws, trimmers, lawn mowers and garden tractors. The Group is also the European leader in consumer watering products and one of the world leaders in cutting equipment and diamond tools for the construction and stone industries. The product offering includes products for both consumers and professional users. The Group’s products are sold via dealers and retailers in more than 100 countries. Net sales in 2010 amounted to $5.1 billion, and the average number of employees was approximately 15,000. Husqvarna has a long history that is rich in tradition. The first Husqvarna plant was established in 1689 as a weapons foundry. In the course of the centuries, Husqvarna has produced a large range of different products, including sewing machines, bicycles, motorcycles and kitchen equipment.

Husqvarna Logo

Husqvarna lawn mowers, Chainsaws, Snow blower, snow blowers


Karl Weiss, founder and patriarch of Gamka, spoke of the distributorship appointment, saying, “We have long wished to expand our product offerings to the landscape industry. We started by introducing a compact class of wheel loaders, mini-excavators and dumpers. By joining with Husqvarna our ability to attract a very large and important market segment is enormously enhanced. We are delighted with the opportunities this presents. The products Husqvarna produces are widely known and well received. We think this relationship will build and build.”

Husqvarna lawn mowers, Chainsaws, Snow blower, snow blowers

Husqvarna lawn mowers, Chainsaws, Snow blower, snow blowers


Gamka is a family owned and operated distributor of light to medium sized construction equipment, building products and supplies. Rentals of the equipment lines Gamka sells and services account for a large portion of the revenue mix. Centrally located in Edison, New Jersey, Gamka World Headquarters is just off Interstate 287 between exits 2 and 3. Gamka is housed in their own 60,000 square foot building, situated on 6 acres of land. The structure contains the company offices, showroom, parts, shipping and service departments. While not as old a company as is the Husqvarna Group, the year 2011 marks Gamka’s 25th anniversary of serving commercial contractors, municipalities and industry in and around New Jersey. More information on Gamka is available on their website,


Husqvarna Equipment

Husqvarna Equipment – Full Range of Products