Floor Joists · Rim Joist · Removal · Encapsulation
Master Attic packs fresh material into the joist bays and rim band under a property in Glassboro, New Jersey, topping off a thin, decades-old layer on a sandy lot toward Delsea Drive or covering a bare rim joist a builder skipped on a recent job near campus. Free estimates anywhere in Gloucester County.
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A floor stays cold from underneath, not from the ceiling, which is why this work runs along the joist bays between the ground and the living space rather than overhead. On many Glassboro properties that space carries a thin, original layer that has never been topped since installation, or nothing at all where it slipped loose years ago, leaving the joists exposed to outside air through most of the colder months.
A technician starts by assessing the existing material, checking for damage or contamination, and confirming whether the rim joist band and any nearby duct or plumbing penetration are actually sealed. A cavity packed with fresh material still bleeds heat through a gap that was never closed, so sealing gets handled ahead of installation. New insulation then fills the joist run, and where the ground itself is bare, a vapor barrier can be added right alongside it.
A ranch on the west side and a house finished last month near campus rarely need identical work, but both start with the same inspection. What that inspection turns up, not a standard package, decides how much goes into the free written estimate for a particular Glassboro floor.
Six related jobs that often ride along with a new crawl space insulation install, each covered in the same free inspection.
Open up a Glassboro crawl space and one of these four things is usually waiting.
A lot of the joist-bay insulation still in place across Glassboro's postwar ranches and splits was adequate for its decade, not for what current guidance calls for in southern New Jersey today, leaving these floors well short of a comfortable baseline rather than just slightly behind.
A foundation vent screen or a gap in the skirting is an open door for mice and squirrels working their way into a crawl space, and once inside, the floor insulation is the first material they settle into, which is why a new install so often follows a wildlife call.
Sandy soil that never fully dries keeps a crawl space floor humid for long stretches of the year, and insulation resting against the underside of that floor eventually absorbs enough of it to pull free from the joists it was fastened to, needing a full swap rather than a patch.
Cutting insulation to fit around the rim joist takes more care than running it straight between two joists, and it shows: this perimeter band gets skipped at construction often enough that it is one of the first spots checked on every walk-through in Glassboro.
Dry ground. Sealed walls. Cleaner air upstairs. Lower bills.
BeforeAfterHear What Our Customers Are Saying
Master Attic did a phenomenal job with our attic insulation and duct replacement. We had a loss from smoke damage from a neighboring fire and we were met with compassion and excellent customer service from Danny Jones and Jorge Diaz. We chose them for their quality of work, expertise and fair pricing and they got the job done promptly. Thank you for the excellent work and we will be recommending you highly!
We just had our attic insulation replaced, and the entire experience was pleasant from start to finish. Robert is knowledgeable, honest and easy to work with at the initial estimate period. Roberta and his crew did a great job replacing the attic insulation for our house. They were very professional, efficient and respectful. They did everything that needed to be done and left the space clean and in excellent condition. I am very happy that I chose Master Attic and would highly recommend them.
Dan Jones and the Ronald crew did a great job from start to finish! I had original insulation in my attic with no electricity, not an easy job. Our upstairs was very hot in the summer and cold in winter. With having central air, we still needed AC units and space heaters to manage. Dan set up a great plan to eliminate that. He and his crew were able to come and finish the job shortly after we first met. They were quick, clean and managed to crawl into small spaces to remove old insulation and install fresh insulation. We have already noticed a major difference! Highly recommended!!
We hired Master Attic to clean out debris, mice, old insulation, and replace with new insulation in both our attic spaces. Roberto and his crew did a phenomenal job. They were extremely professional, polite, and did a fantastic job. They invited my husband to see the attic after each step, and took pictures on their phone to show me since I could not get up in the attic. They took the time to protect the space with plastic sheeting before the job up in the attic, and then cleaned up everything perfectly afterwards. I highly recommend them!
Great job by the team. Cleaned out the entire attic and replaced all the old insulation with new fresh insulation. Made a huge difference. Alex was great to work with and was very professional. Would highly recommend.
Awesome experience from start to finish. Rob provided a great assessment and capabilities overview, arrived on time and was very generous and thorough in explaining the work. I signed on the spot. A crew of six arrived (again, on time) and completely transformed our attic space - thoroughly cleaned out the old insulation (looked spotless afterwards), sanitized the space, sealed it/rodent proofed it, added baffles and of course, replaced the insulation and added more in areas that needed it. Completed the whole job in half a day and we are delighted with the result. Thank you, Master Attic team, for a job very well done! Highest recommendation.
What a great experience I had with this company and its employees. It started with initially interacting with Joe who came out for the estimate. He was funny because he came down from my attic and said "have you seen up there". I laughed because I had and I knew it was bad. He was no pressure and no nonsense. Gave me an estimate and said if I wanted we could have the work done next day. I wasn't ready for that but after some schedule juggling I told him we could be ready. Joe had his guys out next morning with the best part being Jorge calling me to advise he was about thirty minutes out. I appreciate when I am given a heads up as to ETA. Three of them arrived Jorge set out plastic and covered exposed furniture. Jorge, Angel and Gonzalo were all polite and worked hard to complete the task. They worked efficiently and were done quickly. Jorge made sure he included me in each step of the process and when I saw the finished product I was amazed. I can actually use my attic for storage if I choose to do so. I did not realize when they were here that they also do work on crawlspace areas. I will be calling them back to see what they can do for my crawlspace which easily rivals the diasaster called my attic. I recommend at least giving this company and its employees an opportunity to help you.
Great company to work with. From beginning to end, Dan came out, spent plenty of time with me going over everything that needed to be done, and the process of everything that needed to be updated it both attics. His professionalism was top notch, answered all my question and concerns. When it came time for George and his six-man crew to do the work their quality of workmanship was well above average, they were here the whole day, and I don't think they even had a lunch break (hopefully I don't get him in trouble). They all worked and everyone knew what their job was, they removed all the insulation, cleaned, spray foamed all holes and top plates, re-insulated both attics and cleaned up like they weren't even here. Will definitely use them again.
Master Attic remediated a bat issue for us back in October and I can’t say enough about what a wonderful job they did. The work was guaranteed and they encouraged us to call if we say any further evidence of bats. Well, there were a few droppings in the attic and they quickly responded to our concerns. Jose’s crew came out on a SUNDAY, inspected the attic, and sealed up several spots that could be entry points. They were professional, efficient, and kind. I would highly recommend them. You will not be disappointed.
The joist bays between the ground and the living space typically take batt insulation sized to fit whatever spacing a specific Glassboro property was framed with. A vapor barrier over the ground, where the crawl space needs one, is a separate layer installed on its own rather than combined with the floor material.
Access matters more than how big the crawl space is. A crawl space you can move through easily with nothing old to clear out first is a straightforward visit; a tight, low space needing a full swap of failed material is not. Rather than estimate blind, a technician sees the actual space before the schedule gets written into the estimate.
Atlantic City Electric is the utility serving Glassboro, and insulation work has periodically been eligible for support through state-level programs in the past. Because funding levels get revisited on their own schedule, a number posted here today could already be stale by the time someone reads it, so a technician confirms what actually applies to a specific address during the visit.
On its own it helps less than people expect, since insulation slows heat transfer but does nothing about air actively moving through a gap. A floor packed with new material but still drafty at the rim joist will keep feeling cold in winter until that air leak gets closed too.
Thin but otherwise sound material can usually be topped up rather than pulled. It comes out when it has pulled loose from the joists, absorbed moisture, or shows signs of nesting, conditions that turn up often on the west side of town where the ground under a crawl space runs damp for a good part of the year.
Often, yes, since a barrier keeps ground moisture from working its way back into fresh material the way it did with whatever was there before. The two can also be handled separately if only one is actually needed right now. Either way, the inspection looks at both before making a recommendation.
It does. Regular coverage runs through Clayton, Pitman, Mantua, Elk Township and Washington Township, plus the wider Gloucester and Camden County area out toward Cherry Hill. A property sitting just outside those towns is still worth a phone call to check.
Yes, more often than a homeowner might guess. Builders sometimes leave the rim joist band uninsulated or skip a full vapor barrier to save time on a job site, even on a recent build. A walk-through treats every crawl space on its own evidence rather than assuming a newer construction date rules out gaps.
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