Radon, Asbestos, and Older Homes Along the Front Range

The Front Range corridor has a few inspection issues that come up more often here than they do nationally. Two of them, radon and asbestos, are environmental and predate any individual home's construction quality. The third, certain plumbing materials, depends on when the home was built. All three are worth understanding before you write an offer or list a home.

Radon

Colorado is one of the highest-radon states in the country. The EPA's action level is 4.0 picocuries per liter of indoor air; the average Colorado home tests at roughly 5.5. Radon is invisible, odorless, and the second-leading cause of lung cancer after smoking. The good news is that mitigation is straightforward and inexpensive: a sub-slab depressurization system runs about $1,200 to $1,800 installed and reduces indoor radon by 90 percent or more.

We do not include radon testing in the standard inspection because the test runs over 48 hours and requires the home to be closed up during that window, which conflicts with a typical buyer-side inspection schedule. We do offer radon testing as an add-on for $150, run on a separate appointment, with a written lab-certified result delivered five to seven business days later.

For sellers: a pre-mitigation system is a useful disclosure document. Buyers who see "radon mitigation system installed 2018, last tested at 2.1 pCi/L" are reading a strong signal that this part of the home is handled. For buyers: if the home has no mitigation system and was built on a slab or with a basement, schedule a test before closing. The cost of the test is trivial relative to the cost of a system you do not know you need.

Asbestos

Asbestos shows up in three places on Front Range homes built between 1930 and 1985: floor tiles (especially 9x9 vinyl-asbestos tile), pipe insulation in basements and crawls (wrapped, often with painted or yellowed canvas covering), and popcorn ceilings textured before 1978. There is no visible test; identification requires lab analysis of a small physical sample, which we do not perform during a standard inspection.

What we do during the inspection is flag suspect materials and recommend testing if the buyer or seller plans renovations that would disturb them. Asbestos is not dangerous when intact and undisturbed; it becomes dangerous when sanded, cut, broken, or otherwise made airborne. A buyer planning to live in the home as-is can leave asbestos popcorn ceiling alone indefinitely. A buyer planning to remodel the kitchen with asbestos floor tile underneath should test before the demolition starts, full stop.

Abatement is regulated work. A licensed asbestos abatement contractor in our area runs $8 to $20 per square foot, depending on the material and the disposal requirements. The labor is the cost; the disposal is also non-trivial because asbestos waste cannot go to standard landfills.

Galvanized and polybutylene plumbing

Two plumbing materials worth knowing about. Galvanized steel water-supply lines were standard in homes built before 1960, and they corrode from the inside over decades. By forty or fifty years in, the inside diameter of the pipe is significantly smaller than its original spec, the water pressure at fixtures is poor, and the rust deposits stain fixtures and clothes. The fix is a whole-house repipe, typically to PEX, which runs $4,000 to $9,000 in a single-family home depending on access.

Polybutylene was used heavily between 1978 and 1995 as a cheaper alternative to copper, and it has aged poorly. The material is prone to failure at fittings, the failures are typically silent leaks rather than dramatic bursts, and the result is often slow water damage that does not get noticed for months. Insurance companies have become reluctant to write policies on homes with active polybutylene supply lines. The fix is the same as galvanized: a whole-house repipe.

We log both materials when we see them, photograph the visible runs, and recommend a plumber's quote before any offer goes to closing on a home with either. The cost of the repipe is real but not catastrophic, and a buyer who knows about it in advance can negotiate for it explicitly.

What this means in practice

For buyers, the takeaway is that older homes along the Front Range have well-known patterns of issue, none of them deal-breakers, all of them worth knowing about before closing. The inspection identifies which patterns apply to the specific home; the contractors who address them are routine and the costs are predictable.

For sellers, the takeaway is that disclosure is your friend. A buyer who learns about a known issue on the inspection report that the seller did not disclose is a buyer who is going to ask for more concessions than a buyer who saw the issue on the seller's pre-listing report.

If you are looking at an older Front Range home and want a sense of what the inspection is likely to find before you write an offer, the pre-offer phone call is free. We have probably inspected three houses on the same block.

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