Frequently Asked Questions

What special equipment is typically needed to place the block?

Since each block weighs approximately 220lbs you will need machinery such as a forklift, hand truck stacker, track hoe or excavator to lift the block. Together with straps and a masonry Lewis-Key which is provided with the block.


What Size Footer is needed?

Planning codes vary in North West Florida so it is best to consult an engineer and/or architect to determine exactly what is required in your area. Your Masterblock system will require the same foundation as that of a tradition cinderblock build.


What do you do over doors and windows?

Windows and door openings are framed out around the block and horizontal rebar is used between the block above the openings. Once the build is complete and the non-shrink grout hardens, the wooden frames can remove and door and window frames affixed directly to the concrete.


How high can I build?

With Masterblock you can build up to six stories.


How does it compare to traditional blocks?

Masterblock is considerably stronger than cinder block, 4,000 to 4,500 psi versus 1,200 to 2,000 psi and tested to withstand hurricane force winds of up to 220+ mph. Masetrblock is a ‘complete’ building system with finished exterior and drywall ready interior, so it is much quicker to build. The insulation is 40 to 60% more energy efficient than traditional block. Overall, StrongBloc is an extremely cost-effective option.


How does it compare to ICF?

Depending on the size of the insulation and concrete an ICF may, at best, be comparable in quality to Masterblock. However, ICF is significantly more expensive than our patented system. Not only are the ICF materials more costly, but labor costs are considerably higher when you take into consideration the need for additional crews to complete both the interior and exterior work. StrongBloc is an all-in-one solution with a finished exterior and drywall ready interior.


How does the electrical fit into this system?

Typically, a charcoal starter or hot knife is used to channel out the foam insulation to install the electrical conduit. When the electrical is set an adhesive may be applied to seal the insulation. Exterior electrical outlets can be factory fitted.


How does plumbing fit into this system?

Like the electrical, a charcoal starter or hot knife is used to channel out the foam insulation to allow for the plumbing.


What’s the strength of the block?

Our patented block wall system has been tested to be able to withstand 220+ mph winds. It has also undergone ballistics testing and withstood shots from a 300 Winchester magnum high- powered rifle, with no penetration through the block.


What is the size and weight of the individual block?

A standard block size is 32” long x 12” long x 11” wide (consisting of 7” of concrete and 4” of ASTM approved foam). Each block weighs approximately 220 pounds.


How is the rebar installed?

Horizontal rebar is positioned between each block at 12” intervals. The vertical rebar is installed at the end of the build, every 16” off center. At the start of the build, holes are drilled into the foundation at 16” intervals and a patented epoxy capsule is dropped into each hole. When installed, the vertical rebar breaks the epoxy capsule sealing the rebar to the foundation within 2 to 3 hours.


What about the gaps between the blocks as they are set?

A light adhesive is applied between each block as it is laid. When the build is completed and the vertical rebar is set, a patented grout is poured down the holes at 16” intervals to fill in any remaining cavities.


What is the block’s R Factor & Value?

StrongBloc has a R Factor of 30 and depending on the use, a R Value of between 16 and 22.


What are the exterior finish options?

Currently we have offer three standard exterior textured finishes. Custom order finishes are also available upon request at an additional cost.


How many colors options are there and do they cost more?

We offer 35 colors, 11 of which are standard and come at no additional cost. Custom colors require a more expensive white cement base (standard colors are made with a less expensive grey base), making them more expensive to process.


How long does the paint last?

Since the paint dye is incorporated into the block during the manufacturing process it will never need to be painted. However, to prevent fading it is suggested a sealer be applied eveyr 10 to 15 years.


What happens if a block cracks or breaks?

In the course of the past 3 years, with thousands of blocks installed, not one crack has been found. However, if due to a poor footing cracks do occur like cinder block, they can be repaired with mortar.


Can I build with this block near water (on the beach) and is there anything special needed?

Yes! A maximizer can be added during the manufacturing process to close the cells in the concrete to prevent salt from deteriorating the block. Similar to the process used on bridge piers. Cinder blocks cannot be treated in the same way as they are dry poured.


How do the corners work?

The system comes with corner blocks. Custom off-angle blocks are also available at an additional cost.


Is mold a problem when using Masterblock?

Mold needs condensation to form, once the system is sealed with its patented epoxy grout the walls are completely sealed making them impermeable to mold and or insects.


Are insects a problem?

With the thickness of our blocks and no seams it is very difficult for insects to enter the home other than through open doors and windows. A Borax additive, which will repel rodents and other pests is available at additional cost.


What is STC and NSR sound ratings of these blocks?

The blocks have yet to be officially STC or NSR tested, however but customers, such as Vance engineering, have claimed that you can barely hear outside traffic. The blocks have a R Value of approximately 16 to 22, depending on the use and once the 11” wide insulated walls are sealed with a patented epoxy fill they are virtually impermeable exterior noise


What is the block’s PSI?

Masterblock has a PSI of between 4,000 and 4,5000, as compared to traditional concrete block, which depending on the batch, has a PSI of between 1,200 and 2,000.