Insulation FAQs
Straight answers to the questions Austin homeowners and property managers ask us most. Spray foam, attic insulation, removal, radiant barrier, and commercial work.
We get the same questions on a lot of estimates, so we put the straight answers here. How to tell if your attic needs work, what an Austin home actually needs for R-value, whether spray foam is right for your build, and how we handle commercial jobs. If you do not see your question, call us and a real person picks up. We will walk your attic, give you a real number, and tell you what fits your house and what does not.
- Attic & Blow-In Insulation
- Commercial Insulation
- Insulation Removal
- Multi-family
- Radiant Barrier
- Spray Foam Insulation
It depends on the assembly and the code. Blown-in and batt fiberglass for most unit walls and ceilings, spray foam where the envelope or a specific assembly calls for it. We match the product and the R-value to the building, not the other way around.
Open-cell is the right fit for most Austin attics because it lets the roof assembly dry to the inside, which matters in a humid climate where trapped moisture causes problems. It is also more cost-effective per board foot and gives you the R-value an attic needs without overspending. Closed-cell has its place, metal buildings, crawl spaces, and anywhere you need a built-in vapor barrier or added structural strength, and it runs about R-6.5 per inch. We pick the one that fits your build and tell you why on the walkthrough.
Yes. We run prevailing-wage jobs and handle the certified payroll and reporting that come with them. If your project is publicly funded or carries a wage determination, tell us up front so we scope it correctly from the first bid.
Yes. We have worked under GCs on commercial and apartment projects, and we know how to fit into a job that someone else is running. We carry our own general liability, our subs carry theirs with certificates, and we put a foreman on site so you have one person to coordinate with instead of chasing a crew.
Commercial accounts run on net-30. On larger jobs we structure a deposit and progress draws against the work completed, and we lay that out in the bid so there are no surprises on the invoice. Residential jobs work differently, but for commercial and GC work, net-30 is the standard.
Yes, and a lot of our commercial work is exactly that. We plan around your hours, your tenants, and your access so the business underneath us keeps running. That means staging the work in sections, working off-hours where it makes sense, and keeping the crew out of occupied space until it is ready.
Insulation sits in the middle of the trade sequence. When the insulation sub does not show, the drywall slips and the whole job slips behind it. We sequence our work around the trades ahead of us and behind us, and we keep a foreman on the job so the GC has one number to call if anything moves. We tell you where we fit in your timeline before we start, not after.
Yes. For owners and GCs running more than one building, we run the work as a program instead of a string of one-off jobs. Same six-step process on every site, a foreman on each crew, and one point of contact across the whole portfolio. The process does not change when the building or the crew changes, which is what makes a multi-site rollout predictable.
Texas does not require a state license for insulation work. We carry $1M / $2M general liability through Travelers and provide certificates on request before any job starts. Our subcontractors carry their own general liability with ACORD certificates. We are not bonded, so if your project requires a bond, tell us during the bid and we will be straight with you about what we can and cannot take on.
Commercial buildings answer to the energy code, and the inspector signs off before the project moves forward. We match the product and the R-value to the assembly and to what the code calls for, whether that is closed-cell foam on a metal building or batt and blown-in on an office buildout. We get it right the first time so the work does not get punch-listed back to you and hold up your certificate of occupancy.
Yes. Multifamily is a regular part of our work, both new construction and retrofit. We have run apartment projects under general contractors and directly for owners. The job is different from a single house because it is the same scope repeated across many units, and the value is in doing it the same way every time.
Yes. A lot of multifamily work happens in occupied buildings. We stage the work unit by unit or building by building, coordinate access with the property manager, and keep the disruption to residents short. Turn units and vacant units get done first where the schedule allows.
Yes. Multifamily construction has fire-rating and draft-stopping requirements between units and at floor lines that a single-family job does not. We install to the assembly the plans and code call for, and we know where those details matter so the building passes inspection.
Yes. That is where a multifamily job is won or lost. We put a foreman on the job, sequence around the other trades, and run the same six-step process on every unit so the work is predictable across hundreds of units instead of varying crew to crew.
Yes. Sound control between units is a common multifamily requirement, and the right insulation in the right wall and floor assemblies cuts noise transfer between tenants. We match the product to what the plans specify for acoustic performance.
Most modern roof warranties don’t restrict radiant barrier installation because the foil goes on the underside of the rafters, not against the roofing material. If you’re concerned, send us your roofer’s warranty doc and we’ll read it before we quote.
Yes. We run prevailing-wage jobs and handle the certified payroll and reporting that come with them. If your project is publicly funded or carries a wage determination, tell us up front so we scope it correctly from the first bid.
Multifamily and commercial accounts run on net-30. On larger jobs we lay the terms out in the bid so there are no surprises on the invoice. We work under general contractors and directly for owners.
Texas does not require a state license for insulation work. We carry $1M / $2M general liability through Travelers and provide certificates on request before any job starts. Our subcontractors carry their own general liability with ACORD certificates.
A blown-in fiberglass top-off runs $1.38 per square foot, and a full reinstall to R-40 is $2.00, with air sealing included on both. Most Austin attic insulation contractors keep pricing off the page. Ours is listed, and you get the firm number on-site.
Both. If the existing insulation is clean and dry, we top it off. If it’s contaminated, wet, or compressed, we remove it first, then reinstall. You get the removal and replacement priced separately so you can see what each part costs.
For a flat attic floor, yes. Blown in insulation fills around joists, wires, and ducts with no gaps, which batts can’t do once they hit an obstruction. We use batts for knee walls, vaulted ceilings, and new construction, not bulk attic coverage.
Insulation removal in Austin runs $1.67 per square foot of attic floor, with a $1,400 job minimum. A typical 1,500 square foot attic lands around $2,500 for removal alone. That covers the vacuum truck, containment, bagging, and disposal. If the old material is contaminated by rodents or water, the price does not change, but the crew adds a sanitizing step before anything new goes in. We give you a firm number after walking the attic, and the number on the estimate is the number on the invoice.
Yes, and it is the most common way we run a removal. The crew pulls the old insulation in the morning, air seals the attic floor, sanitizes if there was rodent activity or staining, and blows new fiberglass to R-40 the same day. Most removal and replacement jobs finish in one day. Heavy contamination or a very large attic can push it into a second. Removal is $1.67 per square foot and the reinstall is $2.00 per square foot, priced separately so you can see both.
Adding on top is cheaper, and we will tell you when that is the right call. A top-off is $1.38 per square foot with air sealing included. But a top-off only works if what is up there now is dry, clean, and not compressed. If a pest company has found droppings, if there is staining from a roof leak, or if the old material is matted flat, topping over it buries the problem. In those cases removal and replacement costs more up front and is the only option that actually fixes the attic.
We do, and we have since 2001. Home & Office Insulation is a local crew, not a national franchise or a lead-selling site that hands your name to three contractors. The same lead installer who walks your attic for the free estimate runs the job and does the final walk with you. We cover Austin and the suburbs out to about 35 miles from downtown, including Round Rock, Cedar Park, Pflugerville, Buda, and Kyle.
A blown-in fiberglass top-off runs $1.38 per square foot of attic floor. A full reinstall to R-40 runs $2.00. Air sealing is included in both prices. Removal, if the old material has to come out, is priced separately at $1.67. A typical 1,500 square foot attic top-off is around $2,100 depending on how much depth it needs. We measure and give you a firm number at the estimate, and the estimate is free.
Yes. Every spray foam estimate is free and done on-site, not over the phone. The lead installer comes to the house, gets in the attic, and checks three things: what insulation is there now and whether it has to come out, how the roof deck and ventilation are set up, and where the ducts run. Then he measures and gives you a written price by foam type and depth. No pressure, no “sign today” discount. The estimate usually takes 30 to 45 minutes. We run them across Austin, Round Rock, Cedar Park, Pflugerville, Buda, and Kyle.
In Austin, usually yes, with two conditions. First, your attic insulation needs to be in decent shape. A radiant barrier on top of thin or contaminated insulation is money spent in the wrong order. Second, it pays back fastest when your HVAC ducts run through the attic, which is most Austin homes. Meet both and you can expect the attic to run 9 to 14 degrees cooler on a July afternoon and cooling costs to drop 5 to 10 percent. At $1.35 to $1.65 per square foot, a typical 1,500 square foot attic pays for itself in a few summers. If a salesperson quotes you 30 percent savings, they are selling, not measuring.
Turn units and vacant units go first. We stage the work unit by unit, coordinate access with the property manager, and put a foreman on the job so the schedule does not depend on which crew shows up. On occupied buildings we keep the disruption to residents short and predictable. The six-step process is the same in every unit, which is what makes a large repetitive scope finish on time instead of drifting. If you have a make-ready deadline, tell us the date on the bid call and we will tell you whether we can hit it before you commit.
Three usual signs. You smell something coming from the attic vents or ceiling fixtures. You see staining on the ceiling from a roof leak or HVAC condensation. Or a pest company has been up there and told you there is active rodent activity. Any one of those, the insulation has to come out before anything new goes in. We can confirm on-site.
Not after it cures. The chemistry is fully reacted within a few hours of install. Once cured, foam is inert. Re-entry timing on install day is about the cure window, not long-term safety.
Sometimes. If it’s dry, clean, and in good shape, we can spray over it. If it’s compressed, contaminated, or wet, it has to come out first. We make the call on-site after we inspect.
Walk into your attic and look at the joists. If you can see them, you need more. Building code says you should be looking at 14 to 16 inches of loose-fill above the joist tops in this climate. Most Austin homes built before 2010 are well short of that.
Usually yes. If the existing attic insulation Austin homes have is dry, clean, and not compressed, we can top it off. If it’s contaminated, water-damaged, or rodent-impacted, it has to come out first. We make the call on-site after we inspect.
Code minimum for attic insulation Austin homes is R-38. We install to R-40 as our standard on full reinstalls, and we guarantee that R-40 in writing. If you want to go further, we can install to R-49 or R-60 as an upgrade. The cost difference between R-40 and R-49 is small. The performance difference is real but smaller than most homeowners expect. R-40 already gets you the bulk of the gain over code minimum.
Fiberglass holds its R-value for the life of the house if it stays dry and undisturbed. Cellulose holds up well too, with some settling in the first year that we account for. Real-world enemies are roof leaks, HVAC techs walking on it, and rodents. Most attics need attention every 20 to 30 years, mostly because of those three things, not because the insulation itself failed.
Yes, on every job. Insulation without air sealing is half a job. We seal top plates, wire penetrations, plumbing chases, and recessed lights before we blow. Air sealing is included in the install pricing at no upcharge. That is roughly $800 in value most contractors charge separately for. It is the single biggest reason our installations actually perform the way insulation is supposed to.
Three things in one price. Air sealing the attic floor before we blow. Sanitization of the attic space if there has been any rodent activity, water staining, or general buildup over the years. And the new insulation itself, blown to R-40 and guaranteed in writing. Most contractors charge for these as three separate line items. We bundle them because doing one without the others is leaving money on the table for the homeowner.
Older non-IC-rated cans need a 3-inch clearance from insulation. We either install IC-rated covers over them (code-compliant, cheap, quick) or we maintain the clearance and seal around the boxes. We don’t bury non-IC cans. Fire risk.
Yes. The R-value works both directions. Most Austin homeowners notice the summer benefit first because that’s when the system is fighting hardest, but the winter heating bill drops too. The house also holds temperature longer when the AC or heat cycles off.
The foam itself doesn’t degrade. It’s still doing its job 30, 40, 50 years later. Our workmanship is warrantied for 2 years. The foam manufacturer carries a limited lifetime warranty on the product.
Some roof warranties have language about attic ventilation. We can spray your attic without voiding most modern roof warranties, but if you’re concerned, send us your roofer’s warranty doc and we’ll read it before we quote.
We handle removal and cleanup before spray. The attic has to be clean and dry before foam goes in. If you’ve got an active rodent issue, that gets handled first by a pest control company, then we come in.
Not on its own. Modern HVAC systems are designed to provide enough fresh air for a sealed envelope. If your home is older and you’re concerned about ventilation, we can talk through whether a fresh-air intake or ERV makes sense for your build. Most homes don’t need one.
Closed-cell foam is its own vapor barrier. Open-cell is vapor-permeable, which is usually what you want in an Austin attic so the assembly can dry to the inside. We’ll talk through which fits your build.
Sometimes, but not when contamination is involved. If the existing insulation is dry, clean, and not compressed, we can top it off. If it is wet, contaminated, or compacted, it has to come out first. Topping over bad insulation traps the problem in the attic and shortens the life of the new install.
Most Austin attic removals run 4 to 8 hours. Bigger attics or jobs with heavy contamination can run a full day or run into a second day. We tell you which bucket your job falls in at the on-site estimate.
Not when it is done right. We use vacuum trucks with contained hoses that pull the material straight from the attic into the truck outside. We protect floors and any belongings near the attic access. We are not the crew that leaves fiberglass dust on your couch.
Vermiculite installed before 1990 can contain asbestos and requires specialty abatement, not general removal. We do not handle abatement directly. If we find vermiculite or material that looks like it, we stop, recommend an abatement company we trust, and pick the project back up once the abatement is complete. We will not pretend a job is safe when it is not.
Someone needs to be home for the start of the job and the final walk. In between, you can leave. The work happens in the attic with the crew running equipment outside, so the disruption to the rest of the house is limited.
It goes from the vacuum truck to a landfill rated for the material. Contaminated insulation is bagged and disposed of separately per local regulations. We handle the disposal end-to-end. You do not deal with it.
Texas does not require a state license for insulation work. We carry $1M / $2M general liability through Travelers. Certificates available on request.
It’s a layer of reflective aluminum foil installed on the underside of your roof rafters. The sun heats the roof, the roof radiates heat into the attic, and the foil reflects most of that radiant heat back toward the roof before it can warm up your attic insulation, ductwork, and ceiling. It doesn’t replace insulation. It works alongside it.
The Department of Energy puts the range at 5 to 10 percent cooling cost reduction in warm, sunny climates. Some Austin homes see more, especially if HVAC ductwork runs through the attic. Anyone telling you 35 percent or higher is selling, not measuring. We give you a defensible range, not a sales number.
No. Radiant barrier and insulation do two different jobs. The barrier reflects radiant heat. Insulation slows conducted heat. You need both for a complete attic system. If your insulation is undersized or contaminated, fix that first. The barrier compounds the benefit, but it can’t replace what the insulation does.
Austin radiant barrier installations run $1.35 to $1.65 per square foot of attic area, installed. The range depends on roof height and rafter access. A single-story home with a walkable attic lands at the low end. A steep two-story roof with tight rafters lands at the high end. That price covers the staple-up foil, the labor, and sealing at penetrations. We give you the real number on-site after walking your attic.
Three main types. Staple-up foil is the most common retrofit, applied to the underside of rafters. Foil-faced sheathing is built into the roof deck during new construction. Spray-on reflective coatings are applied to the underside of the roof deck with a sprayer. Each has trade-offs. We use staple-up foil for most retrofits in Austin.
Dust accumulation reduces effectiveness over time, which is why radiant barriers belong on the underside of rafters, not laid flat on the attic floor. Installed correctly, dust accumulation is minimal because the foil is vertical or angled, not horizontal. A properly installed staple-up barrier holds its performance for decades.
Most Austin attic installs run 4 to 8 hours for a typical residential attic. Bigger attics or jobs with significant prep work can run a full day. We tell you which bucket your job falls in at the on-site estimate.
Still have a question?
Call us and a real person answers. We will walk your attic, give you a real number, and tell you straight what fits your house.
