Insulation Contractor in Lennox, CA - Cooler Rooms and Sealed Attics
D&J Hawthorne Insulation Services insulates attics, crawl spaces and walls in Lennox, CA. We seal the gaps first, clear out tired or dirty old material, and add insulation that fits each house, from small bungalows to back units.
- Service area
- Lennox, CA
- Call
- (424) 307-8033
Small homes and back units across Lennox
Lennox is a few minutes from our base in Hawthorne, tucked between Century Boulevard, the 405 and the 105, with Inglewood right across Hawthorne Boulevard and Prairie Avenue. It's unincorporated county land, so permits run through LA County Public Works instead of a city hall. The streets are packed with older single-story houses on tight lots, many with a garage turned into a bedroom or a second unit out back, and we see a lot of the same houses in Lawndale.
Those houses shape the job. Attics tend to be low, so there's not much room to move, and a lot of them still have the original insulation, settled flat after decades and sometimes full of droppings. Some sit on raised floors over a crawl space, which is usually where cold floors come from. Before we add anything, I want to see what's up there and underneath, because new insulation over an old problem just hides it.
Our services in Lennox, CA
A lot of Lennox attics we open have a few inches of old fill packed thin, which is usually why the back bedroom stays hot and the power bill climbs. We bring the depth up evenly so the edges near the eaves get as much as the middle, and we keep the eave vents clear so the attic can still breathe.
Houses here on raised floors often have nothing under the subfloor, or a few torn batts hanging loose, so the floors stay cold. We check for damp or damaged material first, then install crawl space insulation held tight to the underside of the floor so it stays put.
Older attics here often have insulation stained from an old roof leak or full of droppings, and laying fresh material over it keeps the problem in your ceiling. We bag the old stuff out and clean up before anything new goes in, and if the leak is still active I'll tell you to get the roof fixed first.
Older ceilings leak air around can lights, pipes, wiring holes and the attic hatch, and insulation over those gaps ends up fighting a draft. We do the air sealing, closing those gaps with foam and caulk, before any insulation goes down so the new material can do its job.
Garages turned into bedrooms and back units are common in Lennox, and their walls are often thin or empty, which is why that room never feels right. We check what's actually inside the walls first, then fill the empty cavities so the room holds its temperature like the rest of the house.
Spray foam costs more, but it seals air while it insulates, and that pays off when your ductwork runs through a cramped attic. If the ducts aren't up there, sealing the gaps and topping up loose fill usually gets you more for the money, and I'll tell you which way I'd go.
Every service we offer
Spray foam insulation
Attic insulation
Blown-in insulation
Home insulation
Insulation removal
Crawl space insulation
Wall insulation
Air sealing services
Basement insulation
Closed-cell foam insulation
Open-cell foam insulation
Commercial insulation
Crawl space vapor barrier
Vapor barrier installation
Attic air sealing
Retrofit insulation
What happens when you call us about your Lennox house
Call or send the form
Tell us what's bothering you, whether it's a hot room, cold floors or the power bill. We'll set a time for me to come out and look.
I look and write it up
I come out myself and check the attic, walls or crawl space, and it helps if you're home so I can show you what I find. You get the price and the plan in writing, with anything that should be fixed first listed up front, so there's no surprise later.
Permit, if one is needed
Because Lennox is unincorporated, any permit comes from LA County Public Works, not a city. When your job needs one, we pull it and set up the inspections with the county so you don't have to.
We install, then walk it
On the day, the crew covers your floors and belongings and seals the leaks before the insulation goes in. I check the work and walk the finished job with you before we call it done.
Lennox insulation questions answered
Who issues building permits in Lennox if it isn't its own city?
LA County Public Works issues building permits in Lennox, because it's an unincorporated area run by the county, not by Hawthorne or Inglewood. To confirm which office handles your address, type the street address or parcel number into the Service Locator on the county's permit site and click Find Services.
Do I need a permit to insulate my attic or a converted garage in Lennox?
The county's permit list doesn't name insulation by itself, so check with LA County Public Works for your address before you assume either way. Their list covers alterations, repairs, replacements and electrical, plumbing or mechanical work, and they generally require a permit for remodels like garage conversions, issued only to a licensed contractor, the owner in certain cases, or an agent for either. When your job needs one, we pull it and handle the inspections.
When does an insulation contractor need a California state license?
A contractor needs a state license whenever the job requires a building permit, uses any additional workers, or costs $1,000 or more in labor and materials. The state licensing board also doesn't let anyone split a bigger job into pieces under $1,000 to get around it, so any job that brings a crew into your attic should be done by a licensed contractor. We're fully licensed and insured.
How much does attic insulation cost in Lennox?
The price comes down to the size of your attic, how much is already up there and what has to be fixed before new insulation goes in, so I give you a written number after I've seen it. Pulling out old insulation with droppings or water damage, sealing a lot of gaps, a tight attic with little room to work, or choosing spray foam over loose fill all raise it. Removal and a permit, when one's needed, are what usually stretch the schedule.
How do I know if the old insulation in my attic needs to come out?
It needs to come out if it's full of droppings, stained from a leak, or smells musty, because new material laid on top keeps that problem in your ceiling. Insulation that's just thin and settled can usually stay and get topped up. I'll go up, look and tell you which you've got, and why.
How long do we have to stay out of the house after insulation goes in?
With blown-in insulation, which is loose fill blown through a hose, you can usually stay home while we work, though it's easier with kids and pets away from the hatch. Spray foam is different, because everyone, pets included, stays out until the re-entry time the foam maker sets, meaning the point when it's safe to come back in. I'll tell you that time before we book the day.
Get a free written estimate for your Lennox home
Send the form or call, and we'll get back to you within one business day to set a time. I come out to your Lennox house myself, look at the space and put the price and the plan in writing, with no pressure to book.
- Call
- (424) 307-8033
- Location
- Hawthorne, CA 90250
- Hours
- Mon–Fri: 8 AM–11 PM, Sat–Sun: 7 AM–11 PM
Have your Lennox attic looked at
If there's a leak or bad wiring up there, you'll hear it from me before you spend a dollar on insulation.