• “I’m finally getting my sewing room!” Wilmington, DE

    “We contacted Mark Group because our third floor was virtually unusable. It was a sauna in the summer and an icebox in the winter. Mark Group sealed and insulated the attic above the third floor and knee walls on the third floor. Downstairs, they used spray foam to seal and insulate our basement and took almost a full day overhauling our crawl space. The improvements made a huge difference. We’re now finally in the process of finishing the third floor and I’m close to having my sewing room!”

  • Mark Group air seals and insulates homes to ENERGY STAR standards.

    Mark Group professionally installs air sealing and insulation improvements. Whether you want us to address room-specific comfort concerns by air sealing and insulating your attic, basement, or crawl space or would like to enjoy the highest return on investment and comfort benefits with a whole-house energy efficiency upgrade, Mark Group installs these affordable energy-saving measures on your budget.

  • ENERGY STAR recommends 13”-17” of attic insulation.

    The U.S Department of Energy and ENERGY STAR recommends specific levels of insulation for attics, basements, crawl spaces, garages and exterior walls depending on where a house is located. Wilmington sits between Zone 4 and Zone 5, with a recommended 13”- 17” of GlassWool attic insulation.

  • EcoFill: 61% recycled content and 100% formaldehyde free.

    Mark Group proudly installs Knauf’s EcoFill and EcoBatt insulation. These products are comprised of 61% post-consumer recycled content and GREENGUARD certified for use in schools and hospitals.

schedule your free home energy assessment now
Most people know that by keeping air in their tires and staying on top of oil changes, their car will operate at peak performance, using as little gasoline as possible to get you where you need to go. However, very few homeowners know how to optimize the performance of their homes.

More than half of the energy consumed in the average Wilmington home is associated with heating and cooling. During a Wilmington Home Energy Assessment, a Mark Group Home Performance Advisor identifies exactly where your home is wasting energy and recommends prioritized upgrades that best meet your comfort concerns and budget.

We look for signs of unwanted air leakage that allows humidity to seep into your home in the summer and causes uncomfortable drafts in the winter. We also check that key locations in your Wilmington home, such as your attic, basement, crawl space, exterior walls and garage, are properly insulated.

Mark Group offers two options for a home energy analysis in Wilmington: Home Energy Assessments & Home Energy Audits. Mark Group Home Energy Assessments are 60-90 minute visual analysis, geared towards helping you understand your best first step towards the financial and comfort benefits of home energy efficiency. A Mark Group Home Energy Audit is a 3-4 analysis complete with diagnostic testing. A full report will be provided within two weeks of the analysis. Please see Home Energy Analysis for more information.
A Mark Group Home Energy Assessment will provide you with a prioritized understanding of the energy efficiency home improvements that will deliver the highest return on your investment and address your home comfort concerns.

For some Wilmington customers, Mark Group installs energy efficiency upgrades one room at a time, such as air sealing and insulating the attic, basement or crawl space. For other Wilmington customers, Mark Group installs a whole-house energy efficiency upgrade to achieve the highest degree of energy savings and comfort in one project. No matter how you proceed, Mark Group’s professional technicians install the energy saving upgrades that best meet your goals and budget.

Most energy efficiency home improvements require only one to two days to install. The cost for an average energy efficiency home improvement project ranges from $1,000 to $3,000. Mark Group’s energy efficiency home improvement services in Wilmington include air sealing, insulation (attic insulation, basement insulation, crawl space insulation, exterior wall insulation, garage insulation), low-E storm windows, duct sealing and duct insulation, solar hot water, and solar electricity/PV (solar panels). We make home energy efficiency improvements in Wilmington simple with Energy Upgrade Packages for attics, basements, crawl spaces, and row homes.
The U.S. Department of Energy has documented the average home saves up to 20% on their energy costs through cost-effective and affordable energy efficiency home improvements like air sealing and insulation. On average, this is equivalent to $750 in savings EVERY YEAR.

While actual savings depends on the cost of energy, climate, and behavior, Mark Group Home Performance Advisors can project your estimated savings potential once we have completed a Home Energy Assessments or Home Energy Audit.

EnergyWorks is a comprehensive energy solutions program for home and commercial or industrial building owners in Wilmington —helping owners find ways to reduce their building’s energy use and providing low interest loans to help them pay for the upgrade.

As an approved EnergyWorks contractor, Mark Group offers our Bucks, Chester, Delaware, Montgomery and Philadelphia County customers full Home Energy Audits starting at $150 and access to up to $15,000 in low-interest loans for energy efficiency home improvements. Please click to learn more or Contact Us for program details, eligible improvements and how to get started. View Larger Map

Attic Upgrades

Learn more about Mark Group’s ENERGY SMART Attic UpgradeRead More »

Basement Upgrades

Learn more about Mark Group’s ENERGY SEAL Basement UpgradeRead More »

Crawl Space Upgrades

Learn more about Mark Group’s ENERGY SEAL Crawl Space UpgradeRead More »

Exterior Wall Upgrades

Learn more about Mark Group’s ENERGY WRAP Exterior Wall UpgradeRead More »