Wall insulation in Alhambra CA - full cavities and rooms that hold their temperature

Most people call us because a bedroom stays hot well into the evening or an outside wall feels cold to the hand, even though the attic already has plenty up there. Many older houses were built with nothing in the outside walls, and attic insulation can't help a wall that's empty. The price moves with how many walls we fill, what's on the outside of them, whether we work from inside or outside and how much patching follows. The schedule turns on how many rooms are involved and whether old wiring or older paint needs a plan first. I'd rather give you a figure after seeing the house, so your own number comes from the estimate. We're based in Alhambra and work in many cities around it, and if yours isn't listed here, please ask.

I start by looking the house over, and in an older home I ask what year it was built and what wiring runs in the walls before anything else, because both shape the plan. Then we talk with you about working from inside or outside, since each leaves a different kind of patching behind. On the day, our crew covers the floors, keeps the dust contained at each wall and drills small holes near the top of each cavity. We fill each cavity full and tight, so the insulation doesn't settle and leave an empty band up top. Where a window header or a block inside the wall stops the fill, we drill again below it. Then we patch the holes, clean up and walk the rooms with you before we leave.

Walls are rarely the only place a house leaks. Gaps around outlets, pipes and the bottom of the walls let outside air slip past new insulation, so air sealing services are often worth doing alongside the wall work. If part of your house sits below ground, basement insulation takes care of those lower walls, which need a different approach.

The Alhambra Building Division issues permits for most home construction work, and its list names exterior stucco and interior remodeling but not wall insulation, so that list alone doesn't settle whether your job needs a permit. We check with the city's building office before work begins, and when a job needs a permit we pull it and keep you informed through the inspections. If working from outside means patching stucco, that's a point we raise with the city, since stucco is on its list. The state also gives insulation work its own license class, the C-2 insulation and acoustical classification, which covers installing any insulation for temperature or sound control.

Many of the houses we see around Alhambra are older, with stucco outside and plaster or drywall inside, and some still have original wiring in the walls, so we plan for patching and for the wiring question on most calls. We see the same kinds of houses on jobs in Monterey Park and San Gabriel, and we handle the walls there the same way.