HASCO
WEATHERIZATION
LLC · Sidney, Ohio · Serving Shelby County & surrounding areas
Insulation · Air Sealing · Comfort
We seal, insulate, and protect the whole home.
HASCO Weatherization LLC treats attics, walls, and crawlspaces the right way — remove what fails, seal every leak, add insulation that lasts, and keep moisture under control. Private-pay projects and certified HWAP installation when the state assigns the work.
- BPI Certified Professionals
- EPA Lead-Safe Certified
- EPA Certified Contractor
- BBB Accredited — A+ Rating
- DOE HWAP Certified Contractor
- Fully Licensed & Insured
Ready to start saving?
Talk to our team today
Most homeowners feel fewer drafts and more even temperatures as soon as the work is done.
Call (937) 203-8044 Or send us a message
Official BPI Certification
Building Analyst – Professional
Henry Szostek III · BPI ID# 5072320
Certified November 20, 2025 · Expires November 20, 2028
Verify at BPI.org
BPI Building Analyst – Professional
Building Performance Institute certified · ID# 5072320
EPA Lead-Safe Certified
Certified for safe work in pre-1978 homes
EPA Certified
Trained to federal environmental standards
BBB Accredited — A+ Rating
Trusted by the Better Business Bureau
Licensed & Insured
Protected work you can trust in your home
DOE HWAP Contractor
Ohio Home Weatherization Assistance Program
HASCO Weatherization
Who we are — and what weatherization really means
We are a local installation crew based in Sidney, Ohio. Weatherization is not a single product — it is a system of sealing, insulating, and moisture control that makes homes cheaper to heat, cooler in summer, and more comfortable year-round.
What we do
Attic packages, wall insulation (exterior siding or interior drill-and-fill), full air sealing, vapor barriers, and crawlspace insulation. We show you the problems — often with a thermal camera — then fix them in the right order.
Why it matters: Insulation alone cannot win if air leaks around it. Order matters.
How we work
Assess the home as a system. Remove failed materials when needed. Seal bypasses. Add insulation to target levels. Vent moisture out of the attic. Protect floors and crawlspaces from ground dampness.
Why it matters: Skipping steps leaves drafts, moisture, and wasted energy behind.
Who we serve
Homeowners on private-pay projects across Shelby County and nearby communities — and households approved through Ohio's HWAP program when we are assigned as the installing contractor.
Why it matters: Same craftsmanship either way. Program details are at the bottom of this page when you need them.
What We Do
Core weatherization services
Jump to the work that fits your home — then dig into process, materials, and why each step pays off.
Attic Packages
Remove old insulation when needed, air seal first, install new insulation, and verify with blower door testing. See attic insulation.
Air Sealing
Seal attic bypasses before insulation goes in — so heated and cooled air cannot sneak around the thermal blanket.
Wall Insulation
Exterior work with siding removal, or interior drill-and-fill for brick and similar homes. See wall options.
Vapor Barriers
Sealed ground covers that stop soil moisture from rising into the crawl and the rooms above. Why they matter.
Crawlspace Work
We assess whether to insulate foundation walls or the floors above — then seal moisture at the ground. See crawlspace options.
Assessments
We find where heat, cold, and moisture escape — then prioritize the fixes that move the needle fastest.
Attic Insulation
Remove, air seal, insulate — then prove it with a blower door
HASCO does not just blow insulation over problems. When the attic needs it, we remove failing material, air seal every bypass so leaks cannot hide under the new blanket, install insulation to target levels, and run blower door testing before and after for verified results.
Remove & replace
Pull old, wet, or failed insulation when it will hurt the new install.
Air seal first
Close penetrations and bypasses before any new insulation goes in.
Insulate
Add blown-in or batt insulation to a continuous, even coverage.
Blower door
Measure leakage before and after for verified, documented results.
Remove old insulation & replace it
If insulation is wet, compressed, contaminated, rodent-damaged, or too thin to save, we remove it and start clean. That opens up the attic floor so we can see every leak path, then we replace it with new insulation built to the levels your home needs.
Why it matters: New insulation on top of failed material still leaves moisture, gaps, and weak R-value. Removal gives the air seal and the new blanket a clean, dry surface to work.
Air seal before we insulate
Before any new insulation goes down, we seal top plates, wire and pipe penetrations, chase openings, recessed fixtures, and other bypasses. Insulation slows heat — it does not stop air. If you insulate first, those leaks get buried and keep wasting energy.
Why it matters: Warm air rises and escapes through attic gaps (the stack effect), pulling cold air in downstairs. Air sealing first stops that chimney effect so your new insulation actually performs — fewer drafts, less moisture driven into the attic, and lower heating and cooling costs.
Install new attic insulation
Once the attic floor is sealed, we add blown-in or batt insulation to create a continuous thermal blanket — including thin spots, empty cavities, and mobile-home belly or roof cavities where heat loss is worst.
Why it matters: With leaks closed, insulation can do its job: resist heat loss in winter and heat gain in summer so rooms stay more even and equipment runs less.
Blower door testing — before & after
We can run a blower door test to measure how leaky the home is before work starts, then test again after air sealing and insulation. You get verified numbers — not guesses — so you can see the improvement in air leakage.
Why it matters: Before-and-after testing documents that the air sealing worked. It guides the crew to remaining leaks and gives you proof of performance when the job is done.
The right order makes the insulation work
Air sealing before insulation is the difference between a job that looks finished and a job that actually saves energy. We remove what fails, seal every path air can take, install the new blanket, and verify leakage reduction with blower door testing when the project calls for documented results.
- Old insulation removed and replaced when needed
- Full air sealing before new insulation goes in
- Continuous insulation to target levels
- Blower door testing before and after for verified results
- Bath fans and vents directed outdoors — not into the attic
Around the Living Space
Outside wall insulation — two proven approaches
Empty wall cavities are a major comfort killer. HASCO insulates walls from the outside when siding can be lifted, or from the inside when brick and similar exteriors make that the smarter path.
Exterior: removing different types of siding
We carefully remove vinyl, aluminum, wood, and other common siding types, dense-pack or fill the wall cavities, then reinstall the siding so the home looks finished when we leave.
Why it matters: Exterior access lets us fill cavities thoroughly without cutting interior finishes — big comfort gains with a clean result.
Interior: drill-and-fill for brick & similar homes
On brick, stone, and other exteriors that should stay intact, we drill from inside, fill the cavities with insulation, then patch and leave a clean finish. Ideal for masonry homes and many older houses.
Why it matters: Brick homes often have empty walls behind solid masonry. Filling them cuts drafts and cold spots without touching the brick face.
Warmer walls. Quieter rooms. Lower bills.
Wall insulation stops the “cold wall” feel in winter and keeps AC from fighting the sun all summer. We match the method to your exterior — siding removal outside, or drill-and-fill inside — so the cavities get filled the right way for your home.
- Siding carefully removed and reinstalled
- Interior drill-and-fill for brick and masonry
- Even fill for fewer cold spots and drafts
- Cleanup and finish as part of the job
Below the Floor
Crawlspace insulation — walls, floors & vapor barriers
Not every crawlspace gets the same fix. HASCO assesses moisture, access, duct location, and how the space is used — then decides whether to insulate the exterior foundation walls, insulate the floor above, or combine approaches. A sealed vapor barrier is part of getting moisture under control either way.
Option A: Insulate the exterior / foundation walls
When the crawlspace can be closed and controlled, we often insulate the foundation walls and seal the rim joist. That brings the crawlspace inside the home’s thermal boundary — warmer floors above, better protection for pipes and ducts in the crawl, and less outdoor air washing through the space.
Why we choose this: Best when moisture can be controlled, vents can be closed or managed, and equipment or ducts live in the crawl. The goal is a drier, more stable space under the house.
Option B: Insulate the floors
In some homes the better path is insulating the floor joists above the crawl — keeping the living space warm while the crawl stays outside the conditioned boundary. We assess headroom, joist condition, moisture load, and whether wall insulation would fight damp conditions before we recommend this approach.
Why we choose this: Right when the crawl must stay vented, stays damp despite best efforts, or wall insulation would trap moisture against framing. Floor insulation protects comfort upstairs without conditioning a wet hole.
Why vapor barriers are important
Soil constantly releases moisture vapor into the crawlspace. We install a heavy-duty ground cover (typically 6-mil or thicker), overlapped, taped, and sealed at edges and penetrations so that humidity cannot rise freely into the wood, insulation, and living space above.
Why it matters: Without a vapor barrier, ground moisture fuels musty smells, mold risk, cupped floors, and wet insulation that stops working. Sealing the ground is one of the highest-impact steps in any crawlspace package — wall insulation or floor insulation.
We assess the home — then pick the right system
On site we look at moisture, standing water history, ventilation, rim joist leaks, ductwork, and floor comfort upstairs. From that we recommend wall insulation, floor insulation, or a combined encapsulation package with a sealed vapor barrier so the fix matches your crawlspace — not a one-size-fits-all pitch.
- On-site assessment: walls vs. floors (or both)
- Sealed vapor barrier across the ground
- Rim joist air sealing where needed
- Warmer floors and cleaner indoor air as the goal
- Package matched to moisture and access conditions
On the Job
HASCO at work in your community
From exterior wall drill-and-fill to full truck-and-crew setups — professional weatherization across Sidney and surrounding Ohio counties.
Simple Process
From first call to a tighter home
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1
Contact us
Call or use the form for a private-pay quote. If you are pursuing HWAP, apply through Ohio first — details are in the program section below.
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2
Home assessment
We inspect attic, walls, air leaks, ducts, and crawlspace conditions, then explain what will move the needle most.
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3
Professional install
Licensed technicians complete the work in the right order — seal, insulate, ventilate, protect — with respect for your home.
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4
Enjoy the results
Fewer drafts, more even temperatures, and real savings on every utility bill.
Customer Reviews
What homeowners are saying
Real feedback from customers who trusted HASCO with their home.
★★★★★
Great price
Very professional crew, fast and efficient, hard workers, very respectful, great work, definitely five stars. I would trust them with anything they do and you can too. Please pass this info on to family and friends, anyone who needs their services. Thanks HASCO.
★★★★★
We just had the HASCO crew insulate the outside walls of our home. So far we can already tell the house is staying warmer and the furnace has not ran as much. We are excited to see how this helps with the west wind as we live in the country with no wind block!
The crew was professional and also took care of knowing our pups needed to be safe during the process. Thanks guys!!
★★★★★
We had an inspector come through our home and he completely missed several major issues — the worst one being the insulation. The house looked brand new, but once HASCO came out, we found out the attic had less than two inches of insulation, and a lot of areas had none at all.
HASCO showed us everything with a thermal camera and walked us through every problem clearly. They brought everything up to code quickly and professionally. They wore booties in the house without being asked, kept everything clean, and explained the pricing upfront with no surprises or upsells. Just an honest, straightforward, extremely knowledgeable team.
Highly recommend HASCO — the difference was night and day.
★★★★★
HASCO and their team were wonderful & they followed up after the job to make sure I was satisfied! They were very knowledgeable and efficient & took the time to share the information. I highly recommend them! Thank you guys!
★★★★★
Great price
The guys came out and insulated the entire house, and installed an exhaust fan and some weather stripping. They were super professional and friendly and cleaned up everything. They got in and got the job done and did it so well.
Before the insulation my home thermostat was set at 73 and felt so hot, it hasn't gone lower than 75 now and feels cool! Even in this heat wave.
They were thorough and didn't mind us following behind while they looked at the heat gun with our questions.
I cannot recommend them enough!
★★★★★
I would highly recommend HASCO and their crew. I placed the 1st phone call and received a callback the same day. We scheduled an estimate and that was completed with an excellent conversation and explanation of the job and what would happen during our crawlspace insulation project. The price was good and since I had received no follow up from the other two companies I called, I had Hasco schedule the project. They were able to come the following week. The crew did a great job, much respect for my home and knowledgeable about the installation. I give them a lot of credit for crawling back into that narrow crawlspace! The finished project looks great and I'm looking forward to a warm floor winter! Great job Hasco Weatherization from Sidney, Ohio!
Home Weatherization Assistance Program
Free Ohio HWAP weatherization for qualifying households
HASCO is a certified HWAP contractor — not the program office. Applications, eligibility decisions, and waitlists are handled by Ohio's official energy assistance programs. If you are approved, a local provider may assign certified contractors like HASCO to complete the work in your home.
Need to apply or check eligibility? Use the official Ohio links below. You do not need to call HASCO first — the state and your local energy assistance provider manage the program from application through approval.
Basic Ohio eligibility
Ohioans may qualify when total gross household income is at or below 200% of the federal poverty level. Both homeowners and renters may apply. Renters must have written approval from the property owner before work can begin.
- Services based on a home energy inspection
- Insulation, air sealing, duct work, and more
- Health and safety testing on every project
- No cost for approved, income-eligible households
Already approved for HWAP and assigned to HASCO? Contact us about your project.
Ohio HWAP income limits
Maximum gross household income for the past 12 months. Limits are set at 200% of federal poverty guidelines and may change each program year.
| People in household | Maximum annual income |
|---|---|
| 1 | Up to $31,920 |
| 2 | Up to $43,280 |
| 3 | Up to $54,640 |
| 4 | Up to $66,000 |
| 5 | Up to $77,360 |
| 6 | Up to $88,720 |
| 7 | Up to $100,080 |
For households with 8 or more members, contact your local energy assistance provider for current income limits. Add approximately $11,000 per additional member above 8 per Ohio program guidelines.
Priority groups
When demand is high, Ohio gives priority to households with:
- Adults age 60 or older
- A member with a disability
- Children in the home
- High home energy use or energy burden
Documents to gather
Your local provider may ask for:
- Photo ID and Social Security numbers for household members
- Proof of income (recent pay stubs or 12 months for some sources)
- Recent utility bills
- Proof of home ownership or landlord approval (renters)
- Proof of U.S. citizenship or legal residency
What's included at no cost
Approved services depend on your home's inspection, and may include:
- Attic, wall, and basement insulation
- Air leakage reduction (blower-door guided)
- Heating system repairs or replacement
- Health and safety inspections
Apply online
Ohio's official portal for HWAP, HEAP, PIPP, and other energy assistance programs.
Go to energyhelp.ohio.govOfficial HWAP program
Income limits, services covered, priority groups, and how Ohio administers weatherization.
Ohio HWAP program siteHomeowner fact sheet
Plain-language overview from the Office of the Ohio Consumers' Counsel.
Read the HWAP fact sheetYour home shouldn't work harder than you do.
Get a private-pay quote from HASCO, or apply for no-cost HWAP weatherization through Ohio's official portal.
Contact Us
Request your free assessment
Contact HASCO for private-pay quotes or if you have already been approved for HWAP and assigned to our crew. HWAP applications must be submitted through energyhelp.ohio.gov — we cannot process program applications.
- Phone (937) 203-8044
- Email Henry@hascoweatherization.com
- Office 724 N Main Ave, Sidney, OH
- Service area Sidney, Shelby County & surrounding Ohio communities
- Hours Mon–Fri, 9:00 AM – 3:00 PM