Insulation in Mountain View, CA
Spray foam insulation in Mountain View most often targets Eichler roof decks and 1950s-60s tract homes that were built with almost no thermal assembly. We install closed-cell and open-cell foam where morning marine fog pushes damp air into wall cavities and low-slope roofs, making air-sealing and moisture control inseparable from insulation work. Most Mountain View jobs are completed in a single visit by a background-checked, uniformed crew, and the 90-Day Done Right Promise covers every application. Call (650) 204-8447 and a live person answers 24/7.
Why Mountain View Homes Are Different
Mountain View contains one of the Bay Area’s densest concentrations of Eichler homes. These 1950s-60s post-and-beam houses have flat or low-slope tongue-and-groove roof decks and no conventional attic, which means blown-in attic insulation simply does not apply. Insulating an Eichler requires exterior rigid foam during a re-roof or interior spray foam application against the roof deck. That single architectural fact reshapes the entire insulation market here. On Eichler re-roofing jobs in neighborhoods like Sylvan Park, we coordinate directly with the roofing crew, because the only practical moment to add continuous rigid foam is when the built-up roof membrane is stripped. Miss that window and the homeowner loses years of energy savings or must open the roof again.
Beyond Eichlers, Mountain View is dominated by 1950s-1970s postwar tract homes built to minimal thermal standards. Many still have original fiberglass batts that have settled or degraded inside 2×4 walls, plus radiant slab heating paired with almost no roof insulation. Renovation pressure from high-income tech workers keeps retrofits frequent across older neighborhoods. The climate adds another layer: Mountain View sits at the southeastern edge of the marine layer corridor off San Francisco Bay, so morning fog and damp air from the Shoreline and baylands side push into residential areas regularly. That means condensation and vapor-management concerns inside wall cavities and shallow roof decks are real, not theoretical, and the delta between a cold foggy morning and a sunny afternoon stresses vapor control all year.
Our Main Mountain View Services
Two services dominate our Mountain View calls: attic insulation for conventional tract homes and crawl space encapsulation for the damp, low-lying lots on the bay side of town.
Attic Insulation in Mountain View
For Mountain View homes with a real attic, this is the highest-return retrofit available. We remove or top up settled fiberglass, air-seal the attic floor first, then blow in fresh insulation to the correct depth for our climate zone. In postwar tract neighborhoods where original batts are now 40 to 60 years old, the difference is immediate and measurable. Most jobs finish the same day. Details are on the Attic Insulation in Mountain View page.
Crawl Space Encapsulation & Vapor Barrier in Mountain View
Homes on the baylands and Shoreline side of Mountain View deal with real soil moisture, not just an occasional damp spot. A sealed crawl space stops that moisture from migrating upward into floor framing and living space. We install vapor barriers, seal vents, and condition the space to keep it dry. It changes how the whole house feels and smells. The full breakdown is on the Crawl Space Encapsulation & Vapor Barrier in Mountain View page.
What happens when you call
- 1
A real person answersNo phone trees - you reach a local pro.
- 2
You get an upfront price rangeHonest numbers before anyone is dispatched.
- 3
A background-checked tech heads outLicensed & insured, dispatched right away.
- 4
You approve before work beginsNothing starts until you say go.
Spray Foam Insulation in Mountain View
Spray Foam Insulation is the most common specialty request in Mountain View because of the Eichler housing stock. These homes have shallow, low-slope roof decks and no attic cavity, so foam applied directly to the underside of the roof deck is often the only way to get meaningful thermal resistance without a full re-roof. On conventional 1950s-70s tract homes, spray foam also solves the air-leakage problem that blown-in fiberglass leaves behind. The marine fog that rolls through every morning makes foam’s air-sealing property as important as its R-value, since damp air leaking into a roof assembly creates condensation inside the framing. Two foam types cover almost all Mountain View work: open-cell for interior roof decks and sound control, and closed-cell where moisture resistance or maximum R-value per inch is required. Most jobs are completed in a single visit, with material from Icynene or Demilec.
Closed-Cell Spray Foam
Signs you need it
Your Eichler roof deck shows interior condensation stains, your re-roof is being scheduled, or you need maximum R-value in a shallow 2×8 or 2×10 roof cavity.
What it costs in Mountain View
Closed-cell spray foam for a Mountain View roof deck typically runs $3.50-$6.50 per board foot installed, depending on depth and access.
How we do it
We prep and mask the deck, spray the foam to the specified depth, trim it flush with the framing, and verify the assembly with a moisture reading before cleanup.
Open-Cell Spray Foam
Signs you need it
Your upstairs stays hot in the afternoon while the rest of the house cools, or you want to quiet traffic noise coming through a vaulted ceiling.
What it costs in Mountain View
Open-cell spray foam for interior roof decks or wall cavities in Mountain View typically runs $1.50-$3.50 per board foot installed.
How we do it
We apply the open-cell foam continuously across the cavity, allow it to expand and cure, then trim and confirm the target depth before the area is closed back up.
What Spray Foam Insulation Costs in Mountain View
| Item | Typical range in Mountain View |
| Open-cell spray foam | $1.50 - $3.50 / board foot |
| Closed-cell spray foam | $3.50 - $6.50 / board foot |
| Rim joist spray foam (per 2×10 bay) | $40 - $80 |
Can you spray foam an Eichler roof in Mountain View without a full re-roof?
Yes, in most cases. Interior spray foam applied to the underside of the tongue-and-groove deck adds real thermal performance without disturbing the roof membrane, though the assembly must be evaluated for existing leaks first.
How soon can you schedule spray foam in Mountain View?
Most spray foam jobs are scheduled within a week and completed in one day. Call (650) 204-8447 and a live person will confirm the next available crew slot.
Blown-In Insulation in Mountain View
Blown-In Insulation is the workhorse retrofit for Mountain View tract homes that do have a conventional attic, which is everything that isn’t an Eichler. Homes built in the 1950s-1970s around Mountain View typically left the factory with R-11 or less in the attic, and what’s there has usually settled to half its original depth. The local fog cycle means the attic floor also needs air-sealing before the new material goes in, because otherwise moist bay air gets pulled through gaps around can lights, top plates, and the attic hatch. Blown-in cellulose or fiberglass can bring a standard Mountain View attic from R-11 to R-38 in a single morning, and the difference shows up on the first summer or fog-season heating bill. Material choices include GreenFiber cellulose and Owens Corning fiberglass, both of which we stock for same-day work.
Blown-In Cellulose
Signs you need it
Your attic insulation looks thin or settled below the top of the joists, and rooms directly under the ceiling run hot or cold.
What it costs in Mountain View
Blown-in cellulose for a typical Mountain View attic floor runs $1.20-$2.00 per square foot installed, including air-sealing prep.
How we do it
We air-seal the attic floor and top plates, then blow cellulose to the full target depth with a dense, even coverage across every bay.
Blown-In Top-Up
Signs you need it
Your existing attic insulation is clean and dry but just too thin, often 4 inches or less over a 1,200-1,800 square foot attic.
What it costs in Mountain View
Adding a blown-in top-up over existing attic insulation in Mountain View runs $0.70-$1.00 per square foot installed.
How we do it
We verify the old material is dry and pest-free, then blow new fiberglass or cellulose directly over it to the correct R-value for our zone.
What Blown-In Insulation Costs in Mountain View
| Item | Typical range in Mountain View |
| Blown-in cellulose (attic floor) | $1.20 - $2.00 / sq ft |
| Blown-in fiberglass (attic floor) | $1.00 - $1.80 / sq ft |
| Blown-in top-up over existing | $0.70 - $1.00 / sq ft |
Is blown-in insulation enough for Mountain View’s damp air?
Only if the attic floor is air-sealed first. Blown-in material insulates, but it does not stop moist bay air from moving through gaps. We seal before we blow, every time.
How long does blown-in insulation take in Mountain View?
A standard attic top-up takes half a day, and a full air-seal plus blow-in usually finishes by early afternoon. Most jobs are one visit.
Radiant Barrier Installation in Mountain View
Radiant Barrier Installation plays a specific role in Mountain View because afternoon sun loads hit low-slope roofs harder than steep, vented roof decks elsewhere. A radiant barrier under the roof deck reflects the solar gain that turns an attic into a heat dome, which keeps the whole house cooler on warm afternoons. It does not replace insulation, but it reduces the cooling load that fiberglass or cellulose has to resist. In Mountain View tract homes with standard angled roofs, this means the attic stays 15 to 25 degrees cooler in direct sun. The marine layer burns off by mid-morning most days, so the cooling window is short but intense, and a reflective barrier handles that spike efficiently.
Attic Radiant Barrier
Signs you need it
Your attic is well insulated but still feels like an oven by 3 p.m., or rooms under a southwest-facing roof run warm while other rooms are fine.
What it costs in Mountain View
A radiant barrier installed across a Mountain View attic roof deck typically runs $0.80-$1.50 per square foot.
How we do it
We staple the radiant barrier to the underside of the roof rafters, leaving the required air gap, and trim around vents, bracing, and sheathing seams.
Radiant Barrier & Ventilation
Signs you need it
Your attic has either too little airflow or none through a flat center section, which traps heat under the deck even when the rest of the attic vents.
What it costs in Mountain View
Combined radiant barrier and ventilation work in Mountain View typically runs $1.20-$2.00 per square foot, depending on the required vent sizing.
How we do it
We install the barrier and then correct intake or exhaust venting so the roof assembly can move hot air instead of storing it.
What Radiant Barrier Installation Costs in Mountain View
| Item | Typical range in Mountain View |
| Attic radiant barrier (rafter-mounted) | $0.80 - $1.50 / sq ft |
| Radiant barrier foil (roof deck) | $0.75 - $1.40 / sq ft |
| Radiant barrier & ventilation | $1.20 - $2.00 / sq ft |
Does a radiant barrier make sense on a Mountain View Eichler?
Usually not on the roof itself, since Eichler decks have no attic cavity. Exterior rigid foam or interior spray foam is the appropriate treatment for that roof type. Radiant barriers shine on vented attics.
Will a radiant barrier lower my cooling bill in Mountain View?
It reduces the roof-deck heat gain that forces your air conditioner to work harder on warm afternoons, so yes, most homeowners notice lower late-summer cooling costs.
Insulation Removal & Replacement in Mountain View
Insulation Removal & Replacement is the right call for Mountain View homes where the original insulation has been compromised by pests, roof leaks, or 50 years of settlement. Postwar tract homes in Mountain View frequently have fiberglass batts that are now thin, dusty, and packed with rodent droppings from decades of attic access gaps. We remove all of it, sanitize the space, and blow or spray in new material at the correct depth for our marine-influenced climate. Old insulation also holds moisture against framing, and with the morning fog cycle in Mountain View, any existing leak or condensation spot gets worse over time. Certain materials, like vermiculite, require special handling and must never be disturbed by a homeowner. We handle removal and disposal, then the same crew installs the replacement in one visit.
Attic Insulation Removal
Signs you need it
Your attic insulation is compacted, water-stained, or full of rodent debris, and the top few inches feel matted rather than fluffy.
What it costs in Mountain View
Full attic insulation removal in Mountain View typically runs $1.50-$3.00 per square foot, including bagging and disposal.
How we do it
We vacuum the old material out with a commercial HEPA extraction unit, bag it on site, and prep the attic for new installation.
Contaminated Insulation Removal
Signs you need it
You have roof leaks that stained the insulation, rodent activity inside the attic, or visible mold on the underside of the roof sheathing.
What it costs in Mountain View
Contaminated insulation removal in Mountain View, with sanitizing included, runs $2.00-$4.00 per square foot depending on contamination level.
How we do it
After extraction, we sanitize the exposed framing and sheathing, then dry and treat the space before any new material goes back in.
What Insulation Removal & Replacement Costs in Mountain View
| Item | Typical range in Mountain View |
| Attic insulation removal | $1.50 - $3.00 / sq ft |
| Contaminated insulation removal | $2.00 - $4.00 / sq ft |
| Replacement blown-in or batt installation | $1.00 - $2.00 / sq ft |
How do I know if my Mountain View attic insulation needs removal instead of a top-up?
If it is wet, matted, packed with rodent droppings, or thinner than 4 inches, removal is the right call. We confirm during the estimate before recommending any work.
Can you remove and replace insulation the same day in Mountain View?
Yes. Most removal and replacement jobs are completed in one visit, because the same background-checked crew handles both steps.
Attic Air Sealing in Mountain View
Attic Air Sealing is the first step on nearly every Mountain View retrofit, and it is the step most homeowners skip. Every gap around a can light, top plate, duct boot, or the attic hatch lets conditioned air escape and pulls damp bay air in, and in Mountain View that damp air is the larger problem. The marine fog cycle means a leaky attic floor actively transports moisture into the insulation, which reduces its R-value while slowly feeding mold on framing. Sealing first, then insulating, gives you the full thermal performance you paid for. It is also the single most cost-effective comfort upgrade on a 1950s-70s Mountain View tract home, far exceeding the return of window replacement. We use caulk, foam, and gasketed covers suited to each penetration type, then confirm the seal with a blower door before the insulation goes in.
Attic Floor Air Sealing
Signs you need it
Drafts appear near ceiling fixtures, dust accumulates around the hatch, or rooms under the attic run noticeably colder in the morning fog.
What it costs in Mountain View
Full attic floor air sealing for a typical Mountain View home runs $400-$800, depending on attic size and the number of penetrations.
How we do it
We locate every penetration, seal the gaps with the appropriate material, and pressure-test the attic floor before any insulation touches it.
Can Light & Duct Boot Sealing
Signs you need it
You can feel air around recessed light trims, or the attic side of a duct boot shows daylight around the joint at the ceiling plane.
What it costs in Mountain View
Sealing can lights and duct boots in Mountain View runs $20-$40 per penetration, materials included.
How we do it
We install rated covers or sealant around each can and boot, then verify the seal from the attic side with a smoke pencil.
What Attic Air Sealing Costs in Mountain View
| Item | Typical range in Mountain View |
| Full attic floor air sealing | $400 - $800 |
| Can light sealing (per fixture) | $20 - $40 |
| Duct boot sealing (per boot) | $20 - $40 |
Should I air-seal before or after adding insulation in Mountain View?
Always before. Air-sealing after insulation is installed means moving the insulation out of the way, which doubles the labor. We seal first, then insulate once.
Does air sealing help with Mountain View’s fog-season moisture?
Yes, directly. Sealing the attic floor stops the stack effect that pulls damp bay air through the house and into the attic, reducing condensation at the roof deck.
Wall Insulation in Mountain View
Wall Insulation in Mountain View usually means retrofitting 2×4 walls that were built in the 1950s-70s with nothing but thin fiberglass batts, if anything at all. Many of these tract homes have settled batts that leave the upper third of each wall cavity empty, which is why whole rooms feel cold on foggy mornings even when the heat is on. The most practical retrofit is drill-and-fill or injection foam through small exterior or interior openings, with no drywall removal and no need to re-side the house. Mountain View’s marine layer makes wall cavity moisture a real concern, so we verify each cavity is dry before it is filled, and choose the insulation type that fits the existing framing. The result is a quieter, steadier indoor temperature and noticeably lower heating costs in the winter.
Drill & Fill Wall Insulation
Signs you need it
Walls feel cold to the touch on foggy mornings, rooms stay drafty despite attic work, or you have original 2×4 framing that was never filled properly.
What it costs in Mountain View
Drill-and-fill wall insulation for a typical Mountain View exterior wall runs $1.50-$2.50 per square foot of wall area.
How we do it
We drill small access holes at each stud bay, blow or inject the insulation to full density, then patch the holes flush in a matching finish.
Injection Foam Wall Insulation
Signs you need it
Your exterior walls have some fiberglass but are not full, and you want maximum air-sealing plus thermal performance in one shot.
What it costs in Mountain View
Injection foam wall insulation in Mountain View typically runs $2.00-$3.50 per square foot of wall area.
How we do it
We inject slow-rise foam through the same small access holes, and it expands to fill the entire cavity with no settling ever again.
What Wall Insulation Costs in Mountain View
| Item | Typical range in Mountain View |
| Drill & fill wall insulation | $1.50 - $2.50 / sq ft |
| Injection foam wall insulation | $2.00 - $3.50 / sq ft |
| Interior wall soundproofing | $1.50 - $2.50 / sq ft |
Can you insulate the walls of an Eichler in Mountain View without opening the walls?
Usually yes, using drill-and-fill through the exterior or interior skin, though every Eichler is different. We evaluate each cavity before recommending a method.
Will wall insulation make my Mountain View home quieter too?
Yes. Filling empty wall cavities reduces both street noise and the low-frequency hum that comes through uninsulated framing, which matters in denser Mountain View neighborhoods.
Attic Cleaning & Rodent Proofing in Mountain View
Attic Cleaning & Rodent Proofing gets paired with insulation work in Mountain View more than almost anywhere else we serve. The same postwar tract attics that lack insulation also lack rodent exclusion, so rats and mice find their way in through gaps at the roofline, around the hatch, and along vent screens. Once they’re in, they turn insulation into bedding and leave droppings that make the whole attic unsanitary. On the bay side of Mountain View, morning fog and damp air can make those contaminated materials cling to framing and compound the problem. We remove the contaminated insulation, sanitize the attic, seal every entry point, and then install fresh insulation with a clean deck and clean air. The 90-Day Done Right Promise covers the exclusion work too.
Attic Cleanout
Signs you need it
You hear scratching at dawn, see droppings in the attic or garage, or find insulation that has been tunneled through and flattened.
What it costs in Mountain View
A full attic cleanout in Mountain View runs $1,200-$2,500 depending on attic size and the amount of contaminated material.
How we do it
We vacuum out all contaminated insulation, bag and remove waste, then prepare the attic for sanitizing and the exclusion work.
Rodent Proofing & Exclusion
Signs you need it
Rodents keep returning even after traps or bait, or you can see daylight at the eaves, at vent screens, or around pipes entering the attic.
What it costs in Mountain View
Rodent proofing and exclusion for a standard Mountain View home runs $600-$1,200 depending on the number and type of entry points.
How we do it
We seal every access point with steel mesh, caulk, and foam where appropriate, then install or repair vent screens and the attic hatch seal.
What Attic Cleaning & Rodent Proofing Costs in Mountain View
| Item | Typical range in Mountain View |
| Attic cleanout | $1,200 - $2,500 |
| Attic sanitizing & decontamination | $400 - $800 |
| Rodent proofing & exclusion | $600 - $1,200 |
Do I need to replace attic insulation after rodents in Mountain View?
Almost always, yes. Rodent-contaminated insulation holds pathogens and stops performing. We remove it, sanitize, and install fresh material in the same visit.
How do you keep rodents out of a Mountain View attic for good?
By sealing every entry point with materials rodents cannot chew through, then verifying the seal and the vent screens. Exclusion is the only permanent fix.
Home Energy Audit in Mountain View
Home Energy Audit is the diagnostic starting point that makes every other Mountain View insulation job smarter. Before we recommend a single dollar of work, we measure where the house actually leaks, where the thermal bridges are, and which rooms lose the most heat during the morning fog. A blower door test tells us the real leakage rate, and thermal imaging shows us the cold spots, the voids, and the areas where settled insulation stopped doing its job decades ago. In Mountain View’s 1950s-70s housing stock, the audit usually finds two or three correctable problems the homeowner didn’t know existed: an unsealed top plate, a missing cavity in a wall, an attic hatch that leaks like an open window. For Eichler homes, the audit is the only way to know whether the roof deck or the walls are the dominant heat-loss surface, and that answer changes which insulation project to do first. The report includes specific recommendations with numbers, not vague advice, and it is yours to keep whether or not you hire us for the fix.
Blower Door Test
Signs you need it
Your energy bills are high even though the attic looks insulated, or rooms feel drafty and you cannot locate the source.
What it costs in Mountain View
A blower door test as part of a home energy audit in Mountain View runs $200-$400 when booked as a standalone measurement.
How we do it
We mount the calibrated fan in an exterior door, depressurize the house, and measure real air leakage in CFM at a standard pressure.
Thermal Imaging Inspection
Signs you need it
Some rooms run consistently colder than others, or you see wall stains that suggest hidden moisture behind the drywall.
What it costs in Mountain View
A thermal imaging inspection in Mountain View runs $150-$300 when added to a full audit.
How we do it
We scan every wall, ceiling, and floor surface with an infrared camera to map missing, settled, or wet insulation in real time.
What Home Energy Audit Costs in Mountain View
| Item | Typical range in Mountain View |
| Full home energy audit | $350 - $600 |
| Blower door test (standalone) | $200 - $400 |
| Thermal imaging inspection | $150 - $300 |
Does a home energy audit tell me exactly which insulation job to do first in Mountain View?
Yes. The audit’s data ranks each problem by heat loss and moisture impact, so you get a prioritized list instead of a guessing game.
Is an audit worth it before insulating an Eichler in Mountain View?
Yes, and it is almost required. Eichlers have nonstandard roof and wall assemblies, so the audit identifies whether the roof deck, walls, or slab is the real heat-loss driver.
Brands We Service in Mountain View
We install and service our brands with local confidence: Owens Corning, Johns Manville, Knauf, and GreenFiber all have what we need for Mountain View jobs. We keep common batt dimensions and blowing materials stocked locally, so most scheduled jobs start without a supply delay.
Pricing for Insulation in Mountain View, CA
| Service | Typical range in Mountain View |
| Open-cell spray foam | $1.50 - $3.50 / board foot |
| Closed-cell spray foam | $3.50 - $6.50 / board foot |
| Blown-in cellulose (attic floor) | $1.20 - $2.00 / sq ft |
| Blown-in fiberglass (attic floor) | $1.00 - $1.80 / sq ft |
| Radiant barrier (rafter-mounted) | $0.80 - $1.50 / sq ft |
| Insulation removal (attic) | $1.50 - $3.00 / sq ft |
| Full attic air sealing | $400 - $800 |
| Drill & fill wall insulation | $1.50 - $2.50 / sq ft |
| Attic cleanout | $1,200 - $2,500 |
| Full home energy audit | $350 - $600 |
Two things push prices higher in Mountain View: Eichler roof decks that require spray foam instead of blown-in material, and access work on older tract homes with tight attic hatches or shallow cavities. You always get the exact price before we start, and the 90-Day Done Right Promise means the work is right or we make it right.
Neighborhoods We Serve in Mountain View
We run crews through every residential pocket of Mountain View, from the Eichler-heavy Sylvan Park area to the postwar tracts across the whole city. Response is typically next-day for the neighborhoods below.
- Sylvan Park
- Monta Loma
- Castro City
- Rex Manor
- Waverly Park
Service Area - Cities Near Mountain View
Our Mountain View crews also cover the surrounding communities, including Los Altos, CA, Stanford, CA, Cupertino, CA, and Palo Alto, CA. Most jobs in these nearby cities are scheduled within the same week as a Mountain View job.
Serving Mountain View, CA - Our Local Coverage Area
We’re based in the Mountain View area and know this community well. Use the map below to see our service coverage - if you’re nearby, we can almost certainly help.
FAQs About Insulation in Mountain View
Most attic insulation top-ups and air-sealing jobs do not require a building permit in Mountain View. Structural changes, like spray foam applied to a roof assembly, may trigger a permit requirement, and we handle that coordination for you. We confirm before any work starts.
Most Mountain View jobs are scheduled within a few days, and emergency or urgent cases can often be booked next-day. Call (650) 204-8447 and a live person will give you an exact available slot, 24/7.
Yes. That is one of the reasons Mountain View homeowners call us first: we remove contaminated material, seal the attic, and install fresh insulation in one sequence, with one crew and one guarantee.
What happens when you call
- 1A real person answersNo phone trees - talk to a local insulation pro.
- 2You get an upfront price rangeHonest numbers before anyone is dispatched. No surprises.
- 3A background-checked tech heads outLicensed & insured, typically same-day.
- 4You approve before work beginsNothing starts until you say go.
What Mountain View Customers Say
"They did the energy audit first - blower door and thermal camera - and showed me exactly where the house was leaking before selling me anything. The fix ended up being air sealing plus a modest attic top-up, not the full replacement another company pushed."
- Grace Nakamura"Rodents had been in the attic for years before we bought the place. They vacuumed everything out, sanitized, sealed the entry points with mesh and foam, and only then put new insulation down. Photos of every stage before I paid."
- Darnell Whitfield"Upstairs was ten degrees hotter than downstairs every summer. They pulled the attic to bare joists, air-sealed every can light and top plate first, then blew it to R-49. First August in this house where the bedrooms and the living room read the same on the thermostat."
- Marcus Hale