Business Details
49 Years
experience
Custom Construction Solutions in Northeast Iowa
C & D Construction has been serving Northeast Iowa's building and construction needs for over 45 years. Founded in 1977 by Dale Demmer and Merlin Clemen, our family-owned business has grown from a small garage operation to a full-service construction company with a 15,000-square-foot facility. We specialize in custom wood post-frame buildings, rigid steel structures, insulation services, concrete construction, renovations, and barn preservation. Our team combines decades of hands-on experience with innovative techniques, including proprietary equipment like our hydraulic scaffolding lift and closed-cell spray foam systems.As Owens Corning Preferred Contractors, we maintain strict quality standards while prioritizing personalized service and transparency. With three generations of family leadership and a commitment to using actual job-site photography rather than stock images, we deliver start-to-finish construction solutions grounded in integrity and craftsmanship. Our 40-acre commercial property in New Vienna serves as both our headquarters and a testament to our enduring presence in the community we serve.
Services
Wood Post-Frame Buildings
Rigid Steel Structures
Insulation Services
Concrete Services
Barn Preservation
Renovations
Details
- Year established: 1977
Highlights and features
- 45+ years of continuous family ownership and operation
- Owens Corning Preferred Contractor certification for insulation excellence
- Custom-built solutions without pre-fabricated kit limitations
- Proprietary equipment for efficient large-scale projects
- 100% actual job-site photography for transparent representation
Associations and certifications
- Owens Corning Preferred Contractor
What people say
Generations of experience
Custom solutions
Family-owned
Quality workmanship
Transparent practices
Services
Wood Post-Frame Buildings
Custom-engineered wood post-frame buildings designed for agricultural, commercial, and residential applications. Our structures feature premium framing materials, steel structural x-banding, and custom doors with robust hardware. We provide complete solutions from foundation to finish, ensuring energy efficiency and durability while maintaining aesthetic appeal through clean siding and precise detailing.
Rigid Steel Structures
Pre-engineered metal buildings offering superior strength and versatility for clear span spaces and high-ceiling requirements. Constructed using Rigid Global Buildings' manufacturing standards, our steel structures accommodate agricultural, commercial, and industrial needs. We handle complete installations including custom trim fabrication and specialized door/window systems for functional and visually appealing results.
Insulation Services
Comprehensive insulation solutions including closed-cell spray foam and blown fiberglass/cellulose systems. Our 2-stage agitation blower enables efficient large-scale installations while maintaining R-value performance. We offer Owens Corning's premium products and specialized 'blow-pack' combinations that merge spray foam with blown insulation for optimal thermal efficiency in residential and commercial applications.
Concrete Services
Full-service concrete operations covering foundations, walls, floors, and decorative elements. Our extensive form inventory allows pouring up to 300' of wall in single pours. We specialize in structural repairs, decorative stamped concrete, and retaining wall systems using reinforced concrete solutions tailored to drainage and terrain challenges in Northeast Iowa's climate.
Barn Preservation
Specialized barn repair and preservation services maintaining Northeast Iowa's agricultural heritage. Our team performs structural reinforcement, foundation replacement, and historical restoration while adapting classic structures for modern uses. We combine traditional techniques with contemporary materials to extend building lifespans while preserving original character through custom siding, trim, and architectural details.
People
Dale Demmer
Founder
Founded C & D Construction in 1977 and pioneered steel roofing adoption in Northeast Iowa. Served in the US Army during Vietnam/Cambodia. Developed proprietary construction equipment before passing leadership to his sons in 2014.
Randy Demmer
Owner/Operator
Third-generation builder with 20+ years of hands-on construction experience. Took full ownership in 2014 and expanded services to include rigid steel structures and advanced insulation systems while maintaining family business values.
Terry Demmer
Marketing Director
Contributes marketing expertise and innovative ideas since joining full-time in the mid-90s. Handles graphics and promotional materials while supporting field operations during peak periods.
Chris Demmer
Product Advisor
Marketing professional in construction materials industry. Provides product development guidance and manufacturer relationships for equipment and material selections used in C&D's projects.
Pam Demmer
Office Manager
Handles accounting and record-keeping since 2012. Maintains financial operations continuity following Patricia Demmer's passing and supports day-to-day administrative functions.
Questions
What construction services do you offer in Northeast Iowa?
We provide complete construction solutions including post-frame buildings, steel structures, insulation, concrete work, renovations, and barn preservation services across Northeast Iowa.
How long has C&D Construction been in business?
We've served Northeast Iowa since 1977, making us a trusted local resource with over 45 years of continuous family ownership and operation.
Do you work on both residential and commercial projects?
Yes, we handle agricultural, commercial, and residential projects of all sizes, from machine sheds to complete building renovations and historical restorations.
Are your construction methods energy efficient?
We specialize in energy-efficient solutions including closed-cell spray foam insulation and Owens Corning's premium insulation systems for optimal thermal performance.
Can you preserve historic barns?
Yes, we specialize in barn preservation with structural reinforcement, foundation replacement, and historical restoration while adapting classic structures for modern uses.
Do you use subcontractors for major projects?
We maintain direct control over all projects but collaborate with trusted local subcontractors for specialized trades like electrical and plumbing work when needed.
Reviews (2)
Terry Demmer
Nov 21, 2016
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Applied closed cell spray foam insulation to my basement. all completed in about 4 hours with assistance on filling out available energy savings rebates. C&D brought great ventilation fans as well as plenty of covers to place over and protect any items in the area from any airborne foam particles. Turned out great!
Andy Willenborg
Mar 17, 2016
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Great work on the Heritage House Museum spray foam project. This will save tremendously on heating and cooling costs. Thanks!
