BuildBlock ICFs Overview


Custom Homes LTD is a Master Distributor of BuildBlock® Insulating Concrete Forms (ICFs) and a CERTIFIED ICF Installer / Custom Builder for both residential homes and commercial projects.


We sell, install, and build, so we can provide:

ICF Wall Erection • ICF Weather Tight Shells • Turn-key Projects • BuildDeck • Floors • Roofs • Complete & Custom ICF Building Services


Whether you’re building a home or a multi-level commercial structure, you can’t beat the rewards of building with BuildBlock Insulating Concrete Forms (aka Insulated Concrete Forms). ICFs provide a lightweight, high-strength alternative to using steel or wood frame.


As a member of ICFA (Insulating Concrete Form Association) with 30 years experience in commercial and residential construction, our owner, Steve Sierleja, a Certified Green Professional (CGP), knows exactly what materials work best to build sound, long-lasting construction. Steve’s focus has always been on building eco-friendly and energy saving homes and buildings, which is a contributing factor in him choosing to represent and sell BuildBlock ICFs. Custom Homes LTD represents quality and excellence, as recognized by the ICFA, winning 5 of 6 categories in the 2008 ICFA Excellence Awards.


BuildBlock Insulating Concrete Forms has 13 manufacturing facilities nationwide, including a facility in Bastrop near Austin, TX. BuildBlock of South Central Texas offers direct sales to DIYers, Builders and Developers in 14 South Central and Southeast Texas Counties surrounding San Antonio, Boerne, Helotes, Schertz, Spring Branch, Canyon Lake, Floresville, La Vernia, and other Texas Hill Country cities as well as Houston, Galveston and the surrounding areas.

Custom Homes Helping Hands Program

Steve Sierleja, while living environmentally conscious himself, advocates a mantra in all of his company practices for Custom Homes LTD and BuildBlock of South Central Texas… “Green Building practices need to be the norm not the exception. We need to be good Stewards of this Earth for future generations. We have the capabilities presently to improve this world for all.”

Member - National Association of Home BuildersMember - Hill Country Home Builders AssociationEqual Housing - HUDEnergy StarSmart Energy BuilderICF - Insulating Concrete Forms - BuildBlock