Insulation Services
Insulation Installation in San Mateo, CA
101 Exterminators handles insulation installation in San Mateo attics and crawl spaces after removal or exclusion work, installing blown-in and batt material to California Title 24 R-values under SPCB Lic. #9119. With a median build year of 1965, plenty of San Mateo attics still carry original insulation that falls short of current standards. We confirm the attic is sealed and rodent-free before anything goes in.
Warning Signs
Signs You Need Insulation Install Service in San Mateo
Blown-in cellulose or fiberglass installation to achieve target R-value (typically R-38 to R-60 for California attics). Crawl space joist bay fiberglass batt installation for under-floor insulation. We work to California Title 24 standards and can provide documentation for permit purposes when required.
Attic insulation below R-19 or compressed to less than 4 inches — significant energy loss
Recent insulation removal that needs replacement
Home failing energy audit or experiencing higher-than-expected heating/cooling costs
Crawl space floor insulation missing or falling from between joists
How It Works
Our Insulation Install Process in San Mateo
Every job follows the same methodical approach — no shortcuts, no guesswork. Here is what to expect when you work with us in San Mateo.
Existing Conditions Assessment
We measure current insulation depth, note any areas requiring air sealing before installation, and confirm that the attic is rodent-free before new insulation goes in.
Air Sealing (As Needed)
Gaps around recessed lights, plumbing penetrations, HVAC ductwork, and top plates are sealed before insulation is blown in to maximize thermal performance.
Insulation Installation
Machine-blown cellulose or fiberglass is distributed to uniform depth and density across the attic floor or specified area. Depth gauges are placed and photographed for documentation.
R-Value Confirmation
Installed depth is documented and final R-value confirmed. For permit applications, we provide the necessary documentation of materials and installation specs.
Why 101 Exterminators
Insulation Install You Can Count On in San Mateo
Title 24 Compliance
We install to California energy standards with documentation for permit and utility rebate purposes.
Pest-Resistant Options
Borate-treated cellulose provides both thermal performance and inherent pest resistance — termites and cockroaches avoid borate-treated materials.
Common Questions
Insulation Installation FAQs for San Mateo
How much insulation does a 1960s San Mateo attic usually need added?
Enough to reach the current Title 24 target, which is normally well above what was installed originally. The real answer comes from measuring existing depth and material at several points, since settling and rodent runways leave coverage uneven. California attics commonly land in the R-38 to R-60 range under current standards. We measure before recommending anything, and we note where existing material is contaminated and has to come out first.
Should the attic be air-sealed before new insulation goes into a San Mateo house?
Yes, and it is the step most often skipped. Gaps around recessed light housings, plumbing and HVAC penetrations, top plates and the attic hatch move conditioned air directly into the attic, and blowing insulation over them does not stop that airflow. Sealing first is what lets the added R-value perform as rated. It is also far easier while the attic deck is still exposed, before new material covers everything.
Is there insulation that resists pests in a San Mateo attic?
Borate-treated cellulose carries pest resistance in the material itself, which is worth considering in an attic that has already had rodent or insect activity. It is not a substitute for exclusion — a roof rat that can still get in will nest in anything. In San Mateo's canopy neighborhoods we pair it with sealing the roofline entries, because it is that combination, not the product alone, that holds over time.
Local Pest Pressure
Common Pests We Treat in San Mateo
Every area has its own pest profile shaped by climate, housing, and geography. These are the pests we see and treat most often in San Mateo — tap any one to learn how to identify it and what treatment involves.
Insulation Installation · San Mateo
Free Limited Insulation Install Inspection in San Mateo
CA licensed and insured. Written estimate before any work begins. Same-day response available for urgent situations in San Mateo.