Energy-Efficient ICF Homes in Maine
Rising energy costs are pushing more homeowners, architects, and insurance companies to rethink how their homes are built. Today, efficiency, durability, and climate resilience aren’t just upgrades—they’re essentials.
At Mariner Construction, we build homes and buildings designed to meet those challenges using BuildBlock Insulating Concrete Forms (ICFs). These systems use interlocking foam blocks, similar to Legos, that are reinforced with steel and filled with concrete to create strong, high-performance exterior and load-bearing walls.
ICFs remain in place, delivering exceptional insulation, sound reduction, and protection against severe weather. By combining the strength of concrete and steel with the insulating power of expanded polystyrene, BuildBlock technology creates homes that are more energy efficient, comfortable, and built to last.
If you’re ready to start planning your ICF project, email Gabe@MarinerME.com or fill out the form below.
Two Build Options:
Build an ICF Basement and Foundation
ICF basements are energy-efficient, well-insulated, waterproof, quiet, and typically drier with lower humidity than standard basements–an excellent value. Unlike traditional basements, there is also no additional framing needed if you would like to finish the space.
This allows you to achieve some of the efficiencies and benefits of ICFs, and then build a conventionally framed building on top.
Don’t put a subpar, damp foundation under your new home!
Build All Outside Walls Of Your Home Using ICFs For Maximum Benefit
ICFs can also be used to build the exterior walls of your home. The benefits of ICF in your basement are even more profound when using them above grade.
Typically the 3-7% cost difference is recouped within the first 3-5 years of owning your home. The out of pocket cost difference is offset by increased energy savings, reduced HVAC system size, and long-term value of your home.
Advantages of ICF
Comfortable and energy efficient due to the concrete’s continuous insulation barrier and monolithic walls. You will feel cool in the summer and warm in the winter. Studies suggest 40-60% increased energy efficiency.
Mold, rot, mildew, and insect resistant. Homes that will last centuries not decades.
Sound blocking with an STC of 51+. Around 3 times quieter than a wood-framed house.
10x stronger than wood-framed homes. Tornado, hurricane, and earthquake resistant.
Exceptional safety performance: Secure bulletproof walls, 4+ hour fire rating, and built to withstand 200mph winds (category 5 storm conditions).
ICF’s code compliant and reduce extra labor compared to installing exterior insulation to a traditional formed foundation
Potentially lower insurance premiums
75% reduction in air infiltration for healthier, comfier homes
Reducing homeowner costs in the long run and increasing resale value
Did You Know… Maine’s building code standards recently changed to require insulation on the interior or exterior of basement walls. ICF is code-compliant and reduces extra labor compared to installing exterior insulation to a traditional formed foundation.
Frequently Asked Questions
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ICFs cost 3-7% more on average compared to using traditional wood construction. This difference can be reduced by smaller heating and cooling system needs, energy-efficiency tax breaks, and lower utility bills for the lifetime of your home.
Typically the cost difference is recouped within the first 3-5 years of owning your home.
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ICF homes look like any other home and are becoming increasingly common across Maine. In fact, you’ve probably passed one without noticing—they look just like traditional wood-framed houses.
The outside uses the same exterior, and the inside is just as inviting. The only noticeable difference will be slightly deeper window sills and door jambs. Oh, and lower utility bills each month.
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Building with ICFs is like any other technology. Once you or your contractor has experience, building an ICF home is just as easy as building a stick-built home.
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Wood structures can be built with high energy-efficiency ratings, but they cannot achieve the same low level of air filtration or thermal mass ICF walls provide. ICFs also resist natural disasters, including fire, earthquakes, tornadoes, high winds and hurricanes, unlike wood structures.
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ICFs are excellent in all types of climates. They provide exceptional insulating value and are safer, quieter, and disaster resistant. ICFs are future-proofed for tomorrow’s building codes today.
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ICF can be used to build:
Stem walls
Foundations
Retaining walls
Safe Rooms
Pools
Houses
Root cellar
Partition walls
Load bearing walls
Schools
Apartments
Hotels
How We Can Work With You
If you or your client’s goal is an energy-efficient ICF home or commercial building, consider Mariner your partner in making it happen.
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Hire Mariner Construction to do the job from earth work to installing the insulated concrete forms and pour. You can take the project from there! Hiring Mariner for earthwork is optional.
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We are a proud BuildBlock distributor serving much of Maine. Purchase forms that are ready to stack, and start your next ICF build project. We keep a large inventory of 6” and 8” forms, but are able to supply you with any BuildBlock products. Materials can be delivered to your site or picked up.
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If you are in the planning stages and interested in an ICF home, contact us today. We can help coordinate your project.
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If you’re building your own house, we will sell and deliver ICF forms to your site and provide consultation. We also offer help on pour day and will rent our bracing systems to ensure that your ICF project is a success.
We Also Offer Composite Waterproofing Services
To bring your ICF foundation to another level, we offer the Hulk Composite Waterproofing System to further protect your foundation.
Fully protect your ICF with a single seamless system in 3 easy steps, rather than requiring layer upon layer of primers, membranes, peel n’ stick, drainage wrap, and protective board products. From the footing up, the monolithic Hulk ICF Composite Foundation System leaves no seams or joints where water can get behind the system.
Our ICF services take us all over the state – from southern Maine to Aroostook County, and New England. We’re ready to be part of your high-performance build.
Start Planning Your ICF Project
The Build Process
