Jointing guide 
Calculator 
- Paving jointing mortar
- Paving spacers
- Decorative gravel & gravel binder
- Subgrade & foundation
-
Adhesives, sealants and installation
Adhesives
- ROMFIX PU adhesive
- ROMFIX artificial grass adhesive 290 ml
- ROMFIX steenlijm 15 kg
- ARDEX CA 20 P
- ARDEX X 32
- ARDEX X 78
- ARDEX X 80
- ARDEX X 90
- ARDEX WA
Sealants
- ROMFIX High Tack 290 ml
- ROMFIX polymer sealant 290 ml
- MorTec Soft 310 ml
- MORTEC smoothing agent 250 ml
- Gun cleaner (applicator gun cleaner)
Waterproofing
- ARDEX A 18
- ARDEX EP 2000
- ARDEX P 4 Ready
- ARDEX P 52
- ARDEX P 52 Ready
- ARDEX S7 PLUS
- ARDEX S8 FLOW
- Ardex SK 100W
- ARDEX SK 12
- ARDEX SK-M 15/30
- DiProtec FLK-Pro 6 kg
Installation tools
-
Application and tools
Jointing tools
- Rubber squeegee
- ROMFIX jointing broom
- ROMFIX coir broom
- ROMFIX jointing roller
- Handle 170 cm
- ROMFIX work gloves
- Waterproof work gloves
- Paving jointing mortar application starter kit
Tools for drainage bedding mortar
- ROMFIX block brush
- Basic notched trowel 18 cm, 8 × 8 mm
- ROMFIX work gloves
- Drainage bedding mortar application starter kit
Other
- ROMFIX rubber blade
- ROMFIX Cleaning wipes
- ROMFIX yellow masking tape 50 mm
- ROMFIX hand brush and dustpan
- ROMFIX sample folder
- Draindeco sample board
- Clear Deco UV starter kit
- Draindeco starter kit
- Aquadrain shears
- Backing rod
- Lithofin IK pressure sprayer 1.5 L
- Lithofin IK pressure sprayer 6 L
- Lithofin PRO blue scrub pad 11 × 25
- Lithofin PRO white scrub pad 11 × 25
- Lithofin PRO scrub pad hand holder
- Lithofin PRO scrub pad handle holder
- Lithofin PRO scrub pad telescopic handle
- RUBI Superpro conical milling bit
- Mixing and machinery
-
Cleaning & maintenance
General cleaning
- ROMFIX heavy-duty surface cleaner
- ROMFIX Powerclean
- ROMFIX Eco High Cleaner
- ROMFIX Eco High Cleaner Wipes – droog in emmer
- ROMFIX Eco High Cleaner Wipes – navulling
- Lithofin ABRA-CLEAN
- Lithofin KF Intensiefreiniger – 1L
- Lithofin MN Vuiloplosser – 1L
- Lithofin Actiefreiniger
Cement haze and jointing residue removal
- Lithofin MN Cementsluierverwijderaar – 1L
- Lithofin KF Cementsluierverwijderaar – 1L
- Lithofin MURO – 1L
Stain removers
Specialist cleaners
Outdoor cleaning
Daily / periodic maintenance
Maintenance kits
- Repair mortar
- ARDEX & GUTJAHR
-
Lithofin
Jointing
Specialist cleaners PRO
- Lithofin ASR Speciaalreiniger
- Lithofin BERO rust remover
- Lithofin HOME graffiti remover
- Lithofin HOME fireplace cleaner
- Lithofin HOME sticker remover
- Lithofin KF silicone remover
Maintenance (regular use)
- Lithofin Cotto Easy-Clean
- Lithofin GLASTILAN
- Lithofin KF Onderhoudsreiniger
- Lithofin MN Glans en schoon
Heavy-duty & deep cleaners
Cement haze removal & post-construction cleaning
Stain removers
Protective & impregnating treatments
- Lithofin VLEKSTOP W
- Lithofin Bescherming >W<
- Lithofin Protector for composite surfaces
- Lithofin MN transparent concrete coating
- Lithofin MN Betoncoating Antraciet
- Lithofin MN Betoncoating Black
- Lithofin RSG Anti-slip Pro
Outdoor cleaning
- Lithofin MN Buitenhuisreiniger
- Lithofin Actiefreiniger
- Lithofin Terrassenreiniger
- Lithofin composite cleaner
Kits & systems
All Lithofin products
Strong foundations for outdoor spaces
A stable subgrade is the starting point for a durable, water-resistant project. The ROMFIX foundation system provides a solid base for roads, tiled surfaces, patios and infrastructure on both soft and load-bearing ground.
Contact usThe ROMFIX system
The ROMFIX system was developed in collaboration with leading engineering consultancies and has been extensively tested and monitored over the years. These detailed analyses have established it as a proven, validated foundation solution. The system can be used on both load-bearing and non-load-bearing subgrades.
The ROMFIX system
Provides stability- Advice and calculations for the right build-up.
- A range of techniques suited to the ground conditions and loading.
- Professional support and installation by experienced specialists.
Infill materials
The ROMFIX system can be filled with different granular materials, depending on the ground conditions and maximum permissible weight. Projects requiring maximum load-bearing capacity often use high-density materials such as aggregate, including crushed concrete. Where a lighter foundation is needed, a low-density material such as pumice or foam glass provides the right solution.
Contact us
The solution to lateral movement
In some cases, the subgrade is so soft that the foundation moves laterally, causing the surfacing to crack, particularly at the edges. This is a common problem with embankments and polder roads. The ROMFIX system helps reduce these hazardous situations.
Contact us
ROMFIX R’Tex
Read more
Non-woven geotextile that separates the subgrade from the construction layers.
ROMFIX R’Cel
Read more
33D geocells that divide the foundation into interconnected cells, providing stability and load-bearing capacity.
See the strength of a smart substructure.
Our infographics show at a glance how the different layers work together to create durable, stable paving. Each layer contributes to improved service life, drainage and load-bearing capacity.
Non-load-bearing subgrade
- Subgrade
- ROMFIX R’Tex
- ROMFIX E’Grid
- ROMFIX R’Cel
- (Lightweight) foundation aggregate
- ROMFIX drainage bedding mortar
- Surfacing treated with ROMFIX bonding mortar
- ROMFIX paving jointing mortar
Build-up for asphalt
- Subgrade
- ROMFIX R’Tex
- ROMFIX E’Grid
- ROMFIX R’Cel
- (Lightweight) foundation aggregate
- ROMFIX R’Tex
- ROMFIX E’Grid
- Load distribution layer
- Asphalt
Geogrids and geocells: How they work together
- Geogrid (2D) develops load-bearing capacity through vertical and horizontal movement of the aggregate. Effective interlock is
essential for this. - Geocells (3D) confine the aggregate within cells, forming a single rigid “mattress” that becomes stronger as cell tension increases. The
perforations connect the cells, allowing the system to mobilise without rutting.
Important: these components form a single system and are not alternatives to one another. The right choice depends on the subgrade, aggregate, traffic loading and traffic volume.
The ROMFIX system stabilises Amsterdam’s Spaarndammerdijk
Amsterdam’s historic Spaarndammerdijk was built in the 13th century to protect the hinterland from the Zuiderzee and the IJ. It urgently needed a new foundation and bedding layer. Heavy traffic had caused substantial settlement, and the worn-out foundation needed replacement.
Read more >
Floating road offers a solution for peat soils in Amsterdam Landelijk Noord
In the picturesque village of Zunderdorp, in Amsterdam’s Landelijk Noord area, roads literally lie in water, especially after prolonged rain. The landscape consists mainly of peat (Land subsidence in the peat landscape | Laag Holland) whose humus-rich material must be kept under water as much as possible to prevent exposure to oxygen in the air.
Read more >Sustainability
Building for the futureChoosing the ROMFIX system significantly reduces CO₂ emissions. The carefully designed combination of foundation reinforcement methods allows a thinner foundation layer without compromising stability or load-bearing capacity. This reduction in layer thickness means fewer transport movements and less material consumption.
Limited excavation, less ground disturbance and reduced peat oxidation also lower emissions across the project. To find out what is possible for your situation, contact our experts.
Ordering and delivery
A calculation tailored to your projectFor ordering and delivery of the ROMFIX system, we recommend contacting us well in advance. We can then help you explore the options, calculate the required quantities and determine the most efficient approach for your project. By being involved from the outset, we can coordinate delivery with your programme and site conditions. This helps you avoid delays and ensures the right materials arrive at the right time and in the right quantities.
Contact usProjects
The ROMFIX system
One of our key innovations is the patented ROMFIX system. This foundation system was developed in collaboration with leading engineering consultancies and has been extensively tested and monitored over the years.
