Attic Insulation in Northern Virginia & Maryland
The Upstairs Should Not Be Ten Degrees Hotter
We are in your attic on every job anyway, measuring intake and exhaust. Insulation is the other half of that conversation, and the two have to be right together or neither one does what you paid for.
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(301) 861-7445TAMKO Diamond Contractor
Licensed VA Class A #2705084385 · MHIC #142051 · Insured
The part that gets missed
Insulation and Ventilation Do Different Jobs
Insulation slows heat crossing between your attic and the rooms below it. Ventilation moves air through the attic itself. They sound like the same problem and they are not, and an attic can fail at either one independently.
The expensive combination is an attic packed with insulation and starved of airflow. It is common, because adding insulation is the obvious answer to a hot upstairs and because blown insulation is exactly what buries the soffit vents that let air in. Heat and moisture stay put, the deck stays damp, and the shingles age from underneath where nobody is looking.
See how attic ventilation works for the other half of this, and why more exhaust does not help when the intake is blocked.
The process
How Attic Insulation Work Gets Done
Four steps, in this order. Steps two and three come before step four for a reason: adding insulation over blocked vents is how a well-meant job makes a roof worse.
Measure what is actually up there
Depth, coverage, and whether it is even. Decades of people stepping through an attic push insulation around, so average depth and worst-case depth are different numbers and only one of them matters.
Check whether it is blocking the vents
Blown insulation pushed out to the eaves buries the soffit vents and closes the intake completely. This is the single most common thing we find, and adding more on top of it makes the attic worse rather than better.
Fix the airflow first
A baffle in each rafter bay holds a clear channel open from the soffit into the attic, so insulation can sit at full depth everywhere else without suffocating the roof.
Bring the insulation back up
Even coverage at the depth your house is short by, with the air channel protected. You get the measurement before and after, so the number is checkable rather than a claim.
Timing
Do It With the Roof
The attic is already open, the ventilation is already being measured, and the intake and exhaust are already being corrected if they need it. Doing insulation separately later means paying for the access twice, and it risks burying vents that were just put right.
Rooms that will not hold temperature
Upstairs noticeably hotter than downstairs in summer, or rooms that never quite warm in winter, with no change in your rates to explain it.
Insulation below the joists
If you can see the top of the ceiling joists across the attic floor, the depth is low. Uneven coverage matters as much as average depth.
A roof going on anyway
The cheapest time to do this work is while somebody is already up there with the attic open and the ventilation numbers in hand.
Why we do not quote an R-value on this page
The target depends on where your house is, what is already up there, and whether the attic is vented, and this service area spans two climate zones. A single number on a web page is a number that is wrong for a good share of the people reading it. We measure your attic during the free inspection and tell you what your house is short by, which is the answer that actually applies to it.
Where we work
Attic Insulation Across the DMV
Licensed in both Virginia and Maryland, working out of Falls Church, so one crew covers both sides of the Potomac.
Credentials
Licensed and Insured in Both States
Both licence numbers are checkable with the issuing body before you book anything, and they are worth checking.
MHIC #142051
Maryland Home Improvement Commission
VA Class A Contractor #2705084385
Virginia DPOR
TAMKO Diamond Contractor
TAMKO Building Products
GAF Certified Contractor
GAF
Owens Corning Preferred Contractor
Owens Corning
BBB Accredited, A+ Rating
Better Business Bureau
Questions
Attic Insulation Questions, Answered
Why would a roofing company do attic insulation?
Because we are already in the attic on every job, and because insulation and ventilation are the same conversation. Insulation slows heat moving between the house and the attic. Ventilation moves air through the attic itself. Getting one right and the other wrong is how attics end up with rotted decking and shingles that age years early.
How do I know if my attic insulation needs topping up?
Rooms that never hold temperature, upstairs noticeably hotter than downstairs in summer, and rising heating and cooling bills without a rate change. In the attic itself, look at whether the insulation sits below the top of the ceiling joists, and whether it is evenly spread or has been pushed around by decades of people stepping through it.
Does more insulation fix a hot attic?
Not on its own, and this is the part that surprises people. Insulation slows heat crossing between the attic and the rooms below. It does nothing about heat and moisture already in the attic, which is what ventilation handles. An attic packed with insulation and starved of airflow is a common and expensive combination.
Can insulation block my attic ventilation?
Yes, and it is one of the most common problems we find. Blown insulation pushed out to the eaves buries the soffit vents and closes off the intake completely. The fix is a baffle in each rafter bay, which holds a clear air channel open from the soffit up to the attic while letting the insulation sit at full depth everywhere else.
Should I do insulation at the same time as a roof?
It is the sensible time. The attic is already open, the ventilation is already being measured, and the intake and exhaust are already being corrected if they need it. Doing insulation separately later means paying for access twice and risks burying vents that were just put right.
How much attic insulation should a house in the DMV have?
It depends on where you are and what assembly you have. The region spans two climate zones and the target changes with them, with what is already up there, and with whether the attic is vented. We measure the existing depth and coverage during the free inspection and tell you what your house is short by, rather than quoting a number that may not apply to it.
Find Out What Your Attic Is Short By
The inspection is free, it goes into the attic, and it measures the insulation and the ventilation together. You get the numbers in writing the same day.
Crews Monday to Saturday. Office phones Monday to Friday.
