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pdub2008

Repair or repair ductwork?

pdub2008
15 years ago

We live in Dallas, TX, and last Nov. we moved into a 1941 house. When we had our A/C serviced this summer, the technician found rodent damage where they had been burrowing in the insulation around the metal ductwork (in the attic). A representative from the servicing company came out and indicated that we needed to replace 5 ducts due to the damage. As we knew we also needed additional insulation (there's only about an R11 up there now) and are considering having a spray-on radiant barrier (LO-MIT II) applied, I contacted a variety of companies for additional bids.

I've received 4 bids for the work, with 2 companies saying the ductwork damage can be repaired with mastic and a special tape, and 2 of them saying the ducts need to be completely replaced (one of them being my servicing company). The two suggesting repairs are both in the "whole house" cooling business (radiant barrier, insulation, window replacement, etc), and the two recommending replacement are HVAC specialists. Of course, the bids for duct replacement are quite a bit higher than the bids for repairing the damage.

From reading the entries on this site, it seems reasonable that repairing the damage would be sufficient, and that would afford us the budget to have the radiant barrier and insulation done at the same time. I want to do the "right" thing though, both to correct the immediate problem and for long-term energy efficiency, so I'd love to hear some thoughts on this.

NOTE: this house has 2 bubble vents and a turbine, but no soffit vents. Is it essential to add soffitt vents during our upgrade?

PDub

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