B-green sustainable technologies

Innovative steel post and beam frame integrated re-bar mesh reinforcing floor continuing up trough walls and welded to the steel post and beam structure, with diagonal tensors. Structural steel door and window frames with Ferro cement infill in the walls and anchored slab on grade foundation. Unmatched seismic resistance and survivability, included is a photo of before and after concrete application of a Low Income Family home built with this system In the Central Valley of Costa Rica!

For further information on these sustainable building systems,
go to Wipo or the Open Architecture Network

Using advanced building maeterials to build B-green houses

Building a light frame out of advanced material

Using advanced building maeterials to build B-green houses

The finished house

Other technologies we use to develop our sustainable houses:

  • Thomas Jefferson auto doors [video | Monticello Home]
  • Operable glass block windows and doors [video]
  • Solar tracking system [video]
  • Grass on roof system [video]
  • Drawer refrigeration system [video]

Important Aspects of building sutainable

The b-green.org is about Sustainable Development NOW. The Tilawa development has significant physical plant infrastructure and existing services available. The public and private services available in our immediate area are in place and constantly being upgraded further.

Costa Rica produces fully 90% of electricity from renewable resources: hydro, geothermal, wind and even solar and biomass. Geographically speaking, b-green.org Sustainable Development is located within 20 miles of well over 40% of the country’s total renewable energy production.

 * Each site home is connected to a metered 110 and 220 (typical USA voltage) as a regular on-the–grid home, powering lights and anything you want to plug in. 

* Each site home has it’s own 12v electrical system, capable of running the refrigerator, and LED light bulb illumination of each and every room, in addition to an appliance circuit of stepped-up 110 volts for a computer and LED screen TV phone charger and CFL light bulbs etcetera. Consider this system a large UPS (uninterrupted power supply) that rather than giving you 5 minutes to shut down your computer, it gives your appliances and electronics protection against lighting, and grid power disruptions for a whole day or more. Additionally the 12-volt system can be doubled in storage & solar panel capacity for those who want to stay off the grid permanently. Doubling the system provides an almost indefinite power supply if used conservatively by occupants (read turn it off when not used, and only use high efficiency appliances and lighting).

Even if you have no intention of going off-grid, everyone will appreciate the appliance surge and lightening protection, that a house sized UPS and efficient appliances have on energy bills and lifestyle, especially when looking out at all the lights off around the lake on occasion.

Phone and web access
Each home is connected to a phone central with ten incoming and out going lines to the world, accessed by dialing zero. Cellphone service is available; WiFi Web access in the Hotel Tilawa lobby is at a 128k speed currently, individual dial-up connection is available through the hotel’s phone center. As technology advances and prices drop we will adapt to a communal satellite up link for broadband service. The service presently cost $3500 to set up and $180 monthly, the local cable company is developing in this direction.


Sustainable Development b-green, like the hotel Tilawa, is served by a gravity fed potable water system and our own 3000-gallon water storage tank providing a metered service to your house and supplying our community fire hydrants. As a CR Government resource, the spring water you access in your home is from over 7 miles distance and within a protected virgin jungle forest reserve on Gov. land on the side of Volcano Tenorio. It was paid for by a grant from the Dutch government in 1987 and today serves over 220 households and the Hotel Tilawa.

Tilawa and Sustainable Development b-green also has access to a deep earth spring, although our historical use of this water can be counted in days used over the last 16 years.

Each home site will have it’s own rainwater collection tank, collecting rain off the roof of your up hill neighbor, while your roof collects water for the next house down the hill and that way creates water at pressure. The rainwater is used to flush toilets in rainy season and as an emergency 1-month supply in dry season, just in case.  The change between systems is an easy operating valve located next to the toilet.

Bricks and mortar infrastructure

The infrastructure of the b-green.org development and that of each home site is customer designed, engineered and constructed according to Pacific Rim Builders goal, standards set for building extremely earthquake resistant homes with 50 year maintenance free roofs and exteriors, to name just two of many points. However, rather than text, please look through our collection of videos on the side bar of the houses page and the links to World Trade Organization and the Open Architecture web sites.

Green zones, walkways & roads

Costa Rica is synonymous with access to nature, so there is a high aesthetic value of conserving the natural environment. The community’s social awareness and responsibility range is very pro-active; from building the grammar school and a new library, to swing- sets for the outer lying schools.  We consider ourselves to be part of nature and recognize the fact that our footprint can literally be a one-step after another in the direction of sustainability. Let’s choose to live in a built environment that is within short walking distance to the goods and services of a first world lifestyle.

  • Walkways, trails, and shortcuts to the Hotel, restaurant, and Marina making it faster to walk, than it is to drive.
  • Green zone habitat for a myriad of wildlife, including monkeys, toucans, and many, many more species.
  • Conservation of year round stream in jungle for animal use, not exploited for total human use.
  • Organic garden offering vegetables for sale to the general public, and educating tomorrow’s commercial gardeners.
  • Almost one kilometer of roads within the development that are paved when grade requires.
  • A paved home entrance and parking area for you and visitors.
Health and Well-Being

Housing choices influence our health and well- being in both the short and long term and in both the best of times and the worst of times. The fact is, the average person spends a significant amount of time indoors and possibly a significant amount of their personal net worth on their home, thus proper design, construction, and material selection in homes can lead to superior quality and durability that will provide a comfortable living environment. Additionally well thought out design and materials use can preclude the need to fumigate ones’ home for insect infestation, (if there is nowhere to hide, there is no home for them). Equally important in the mountain climate of CR is using black-mold proof (not resistant but mold-proof) cement plaster rather than paint; clean indoor-air is in fact a problem in many homes in the tropics. The sustainable b-green home provides a healthy, toxin-free, robust first-world living environment for occupants, now and for decades to come.