Los Angeles · Orange · Ventura · Santa Barbara & Surrounding Counties
Frequently Asked Questions
Low price guarantee
Lifetime guarantee
FAQ
Common Insulation Questions
Looking for answers about attic insulation, crawl space insulation, or improving your home’s energy efficiency? This FAQ page covers the most common questions we hear from homeowners and property managers throughout Southern California.
At Everguard Insulation, we provide professional insulation services designed to improve comfort, reduce energy costs, and create healthier indoor environments. Below, you’ll find detailed answers about insulation materials, installation processes, project timelines, and what to expect when working with our team. We’ve made this resource to help you make informed decisions before starting your insulation project.
1. General Company
You should choose Everguard because we’re extremely experienced in retrofit homes—we’ve been serving Southern California for 65 years, far longer than most insulation companies. Our team is licensed, bonded, and insured, and we use safe, eco-friendly insulation products. We’re a local, family-owned business, and our values show up in every interaction. You’ll always talk to a real, trained, knowledgeable person, never an AI bot, automated answering service, or someone in a distant outsourced country. Our installation techniques are unique, allowing us to get 35–40% more material into walls without causing damage—almost double the performance of standard methods. We provide transparent, honest, and personable service, with advice tailored to your
home; never an upsell.
We stand behind our work with a lifetime guarantee: our blown-in insulation will never settle, pack, or lose its insulating qualities, and our workmanship is guaranteed. If you ever notice an issue—even years later—we’ll make it right. Finally, our low-cost guarantee ensures you don’t pay more than necessary. We price match whenever possible, because we never want you to think you have to pay more to use our services. And because we buy our materials direct, you avoid inflated, padded costs for salesmen, commissions, or seasonal discounts. In short: experienced, trustworthy, high performance, and affordable insulation—done right.
We proudly offer a manufacturer-backed lifetime guarantee on our blown-in insulation materials, ensuring they will never settle, pack, or lose their insulating performance for the lifetime of your home. Additionally, our workmanship is guaranteed—we ensure the insulation is installed thoroughly and properly, giving you long lasting comfort and energy savings.
We are confident that you will not find another licensed insulation company with lower prices. However there may be a few unlicensed low-ballers lurking around the corner or a salesperson desperate to make their quota. We would never want you to think you
had to pay a premium to work with us, so should you find a lower price, we will match or even beat it!
Because we don’t run a sales focused operation. Our pricing is wholesale-direct, and we work directly with homeowners. Many insulation companies rely on commissioned salespeople whose job is to immediately pressure you into an in person consultation to get a foot in the door and “close” big jobs. They show up with a contract in hand and upsell services you may not need. We don’t do that, so we don’t have big commissions or inflated pricing built into our estimates. We do have knowledgeable office staff who can assess your needs and offer honest recommendations at your pace over the phone.
And we offer onsite estimates if our staff or you as the homeowner feel that visiting your home will provide clearer information — but we’re there to help, not to pressure you or
play games. The result is straightforward advice and lower pricing passed directly to you.
Yes, we allow our customers to divide payments over 3 consecutive months at no interest rate or other cost. We also have a low-price guarantee.
We accept cash, check, Zelle, debit, and all major credit cards (Visa, Mastercard, Discover and American Express). For credit cards, like other service companies, there is a 3% processing fee which goes directly to the credit card processing company, not us. None of our other options have fees.
Not really. To be quite open about it, we consider ourselves a wholesale-direct installer - we don’t rely on salesmen to close expensive deals nor do we pad our pricing to then allow for discounts or special promotions. We try to keep our pricing cut right to the bone and in many cases, homeowners have discovered that we can insulate your home for less than a do-it-yourself option.
The majority of our work is on existing residential homes but we can include some new construction services with ADU’s or other small projects. Our focus is mostly on retrofit applications in making existing homes more energy efficient.
2. Insulation Materials & Comparison
For existing and older homes, blown-in insulation is almost always the most effective and economical option for its many advantages over rolled-in batt insulation and this is because additional blown-in insulation can be installed without having to remove the old existing insulation. Many of our competitors will almost automatically advise or convince homeowners that they should remove the old insulation because it's the 'right way' to do the job but unless you have massive rodent infestation, heavy water damage or extensive fire damage, there is really no reason or benefit to removing the old insulation, we can often use it as a base and install blown-in insulation over it. The blown-in insulation can be installed over any existing insulation without having any gaps, voids or cavities and this is why the blown-in application is almost 40% more effective!
Blown-in insulation also provides more complete coverage because it fills and covers over uneven surfaces, around wiring, plumbing, ducting, framing and gets into hard-to-reach areas. It can also be installed into attics with challenging access. The key advantage of the blown-in insulation is that it creates a “monolithic” fill or blanket of insulation throughout the attic, whereas batting or rolls often leave gaps, voids and can't get into inaccessible areas. Overall, blown-in attic insulation is dollar-per-value one of the most effective upgrades you can make on your home. It will keep you cooler in the summer, warmer in the winter, lowers energy bills and it good for the environment.
Both blown-in and batt insulation have their uses, but for attics, blown-in insulation has clear advantages. Its key benefit is complete coverage, filling around joists, plumbing, pipes, and conduit, which can improve performance by 35–40% compared to batt insulation. Unlike rolled or batt products, blown-in insulation never settles, packs, or loses its insulating qualities over time, which is why we offer a lifetime guarantee on it. Blown-in materials also provide resistance to rodents, pests, fire, mold, and mildew, and they offer soundproofing benefits. They are eco-friendly, safe, and comfortable to be around, making them ideal for people with concerns around air quality, allergies, asthma, or immune sensitivities. For overall performance, safety, and long-term comfort, blown-in insulation is the superior choice. You can find more detailed information on our product pages.
All three insulation materials have their application but for attic or wall insulation, the Cellulose and Rockwool have several many key advantages. They're more effective, longer-lasting, and safer. Fiberglass has a hazard-warning label, tends to be itchy, settles and loses efficacy over time, and requires thicker amounts of material to work as effectively. Please see our section on ‘Cellulose vs. Rockwool vs. Fiberglass.’
As for Rockwool, we’re pleased to be one of the very few Southern California installers able to utilize this material effectively in both walls and attics. This material is very similar in its qualities and performance to Cellulose, with two primary distinctions: Rockwool is flame proof rather than flame resistant (Cellulose), and is able to soundproof both airborne and vibrational sounds rather than airborne exclusively (Cellulose). Both are excellent products that you can’t go wrong with, but because Rockwool is priced at a premium rate, we recommend it primarily to homeowners who want to prioritize fire proofing or sound proofing. For more information, visit our or individual product pages.
Radiant Barrier is a secondary insulation layer meant to complement your primary attic-floor insulation. It is not a substitute for attic insulation but rather something that works alongside a solid R-38 of Cellulose, Rockwool, or Fiberglass. It’s also the best choice for insulating most garages. Find more info on our Radiant Barrier or Garage Insulation pages.
The ideal time to install Radiant Barrier insulation is immediately after a clean-out, when the attic is fully accessible. After insulation or storage is put back in place, installation becomes much more difficult, and many contractors will not perform this type of work. To learn how Radiant Barrier can improve energy efficiency and comfort, visit our material page
Rockwool is the clear winner for soundproofing. Its density and structure make it extremely effective at reducing airborne noise between rooms, floors and ceilings and from outside noise entering the home. Cellulose also offers some sound reduction but Fiberglass provides little to no meaningful soundproofing benefit. Therefore, for noise control, Rockwool is generally the most effective option.
We generally do not recommend spray foam insulation. While it offers strong air sealing and high R-values, once it expands and hardens, it becomes very difficult to remove or modify. If repairs, maintenance, or wiring adjustments are needed in the future, removing hardened spray foam can be time-consuming and costly, and it may damage surrounding materials.
Over time, prolonged exposure to moisture, heat, or UV light may cause degradation. In some cases, this could release compounds into the air, which may contribute to irritation or discomfort, particularly in poorly ventilated spaces such as attics.
For these reasons, we typically recommend other insulation options that provide reliable performance while remaining more accessible, serviceable, and cost-effective long term.
Yes—we use safe, eco-friendly insulation products like Cellulose and Rockwool, which are made from recycled materials and designed to be safe for families and pets. These options are low-impact, non-toxic, and sustainable, so you get a healthy home environment without sacrificing insulation performance. See more information on our product pages.
Yes. Both are low-dust, non-toxic, formaldehyde-free, and treated with natural borates that deter pests, mold, and fire.
Yes — a whole house attic fan can safely be installed with blown-in, loose-fill Cellulose or Rockwool insulation. A common concern is that loose-fill insulation will blow around or create a “snow globe” effect inside the attic. In reality, this does not happen. Both blown-in Cellulose and Rockwool insulations are dense, meaning they stay in place and do not get pulled into the fan or airflow. It also does not block or interfere with attic ventilation when properly installed. In fact, whole house fans and blown-in insulation are often used together to
improve home comfort, airflow, and energy efficiency.
3. Service Questions
If your home has less than R-38 insulation in the attic, you need more insulation! The R-rating system refers to thermal efficiency, the thicker the insulation, the higher the R-value. Since some materials have a higher R-value than others, the amount of inches required varies across different brands and types.
Homes with little or no insulation are uncomfortable and experience high energy bills caused by excessive A/C or heating usage along with drafts and temperature fluctuations across rooms. Many homeowners often believe they have adequate insulation but unknowingly fall well below current recommendations and building standards . A quick DIY measurement or an onsite inspection can confirm insulation depth and coverage but as a rule, anything under R-38 means your home is under-insulated.
Yes—we can remove existing insulation, but in most cases, it’s not necessary. Many companies use scare tactics to push full removals as a “standard, necessary” service (which is profitable for them), but unless your insulation has fire damage, water damage, or severe rodent infestation, there’s usually no real benefit—and it can unnecessarily double the cost of your project. In most cases, we save homeowners money by leaving the existing insulation in place or performing a partial removal if needed. We then seal the old insulation under a new layer of blown-in insulation, bringing your home up to R-38 and meeting building code requirements without a full removal. Some homeowners choose to remove simply for peace of mind, which is perfectly fine. We’re always happy to review options and recommend the best approach for your home.
Yes! — and this is one of the most effective insulation upgrades for older homes. We use a drill-and-fill method, where 2-inch holes are drilled onto the surface of the wall and insulation is densely injected into the hollow wall cavity. This process allows us to insulate walls without removing existing drywall. As long as the wall cavities are hollow and do not have any existing insulation, this method works extremely well. Furthermore, with Everguard’s innovative back-pressure relief system we can pack 35-40% more material into the wall than other installers, resulting in nearly double the thermal and soundproofing effectiveness.
Yes — in most cases it is safe and hygienic.
If existing insulation is dry and free of fire damage, water damage, or severe rodent infestation, it can safely remain in place. Installing blown-in insulation over it seals the old layer, reduces air leaks, improves energy efficiency, and brings the attic up to modern standards like R-38 — without the added cost and disruption of removal.
Air sealing can be important when using rolled-in Fiberglass, which doesn’t provide complete coverage. However, with blown in Cellulose and Rockwool, the dense, monolithic nature of these materials naturally inhibits airflow, making additional air sealing usually unnecessary. That said, we still seal any visible gaps or holes—for example, spots large enough for light to shine through—to ensure your home is properly insulated and draft-free.
Yes—in many cases, insulation can still be installed even if asbestos is present. The key is understanding its condition and proper planning. Asbestos is sometimes found in older homes around A/C ducting and pipe wraps, and is not found in insulation materials itself. It is generally only a concern if it is damaged or disturbed. If the material is intact, it can often be safely worked around. If it is damaged, it should be professionally sealed or removed before insulation is installed. Asbestos and insulation work should be handled as separate scopes to meet code compliance, and we do not recommend partnering with companies who claim to offer both services together. If you suspect asbestos may be present, let your contractor know early so the work can be planned safely and correctly.
4. Installation Process
No—surprisingly not. Our work is clean and contained. We use a dust-reduction system, keep all major machinery outside the home, and during removals, bag or vacuum material inside the attic so it’s safely contained before being moved outside. We also prep key areas with plastic tarps to prevent dust, scratches, or other damage. Noise and disruption are kept to a minimum—homeowners often compare the sound levels to gardeners working outside. In fact, some have even been known to sleep while we’re working.
Yes! Most of our work is quiet, and we don’t use any chemicals or harmful substances. Homeowners can comfortably stay in the house during installation. As for pets, they’re welcome as long as they’re non-aggressive or can be safely contained away from our crew.
No – While the Department of Building & Safety will gladly exchange your money for a permit on any project valued at $500 or more, they generally do not require permits for insulation work because it’s classified as maintenance, not an addition. There are a few local exceptions. As of 2026, Pasadena and Hermosa Beach may require permits for certain insulation projects, so it’s always worth checking local rules. If you’re unsure, just ask us—we keep up with this stuff so you don’t have to.
No. Proper ventilation is always maintained. When we install insulation, we keep airflow open and functioning as designed. After installation, we inspect the space to make sure eave vents, exhaust flues, gable vents, and all other ventilation paths remain clear and unobstructed. Insulation should improve comfort and efficiency—not interfere with your home’s ability to breathe.
Recessed lighting fixtures come in two main types: IC-rated (safe for direct contact with insulation) and Non-IC-rated (insulation must be kept clear). We evaluate every fixture in your home and install insulation safely to prevent any issues. For Non-IC-rated fixtures, we pull insulation away and create a barrier around the light to maintain safety. In many cases, we also recommend upgrading to LED bulbs, which produce minimal heat and are more energy-efficient.
5. Cost & Value
Recessed lighting fixtures come in two main types: IC-rated (safe for direct contact with insulation) and Non-IC-rated (insulation must be kept clear). We evaluate every fixture in your home and install insulation safely to prevent any issues. For Non-IC-rated fixtures, we pull insulation away and create a barrier around the light to maintain safety. In many cases, we also recommend upgrading to LED bulbs, which produce minimal heat and are more energy-efficient.
In older homes, insulation can pay for itself very quickly, sometimes in less than a year based on reduced energy usage and saved costs. Most homeowners see significant monthly savings on heating and cooling after upgrading their insulation. In addition to financial savings, the comfort improvement is usually significant and immediate.
Absolutely! In older homes, insulation is often one of the highest return-on-investment upgrades you can make. Many homeowners see noticeable energy savings immediately and in many cases insulation can pay for itself in less than a year through reduced heating and cooling costs. Beyond energy savings, insulation improves comfort, reduces drafts, and helps stabilize indoor temperatures year-round while also making the home feel quieter from outside noise.
Yes! Many homeowners regret not insulating sooner, as it means years of high energy bills and uncomfortable temperatures could have been avoided. Many sellers have their homes insulated during escrow and are surprised at how much more comfortable and efficient their homes could have been for years prior. Adding insulation can also make your home more appealing to buyers and may even improve resale value.
Yes — in most cases uneven temperatures are often a direct result of insufficient insulation. Adding insulation to attics, walls, ceilings or subfloors can dramatically improve comfort by slowing and equalizing heat gain and loss, making it one of the most effective solutions year-round for rooms that are consistently uncomfortable. You can find more information on how insulation works on our products page.
Because up to 70% of a home’s heat gain and heat loss happens through the attic, it is by far the most important area of the house to insulate. If the attic is under-insulated, the rest of the home will struggle to stay comfortable no matter what you do elsewhere. Many homeowners believe their attic is adequately insulated when, in reality, they only have a fraction of what’s recommended. This leads to higher heating and cooling bills, uneven temperatures, and unnecessary discomfort throughout the home.
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