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Question DetailsAsked on 8/14/2017

How much does it cost to raise a roof in new orleans

The height of my gabled roof is not sufficient to install a central air unit.

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Here are some previous questions on cost of raising a roof or building a dormer FYI:


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http://answers.angieslist.com/Raising...


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Pricey way to install an A/C unit though - if you do not have enough room in the attic (which is generally the worst place to put an A/C because you are effectively pre-heating the cooled air in the attic ducts plus making the A/C work against typically a 40-60 degree higher ambient temperature) then I would be looking at first a conventional ground-mounted unit (the normal location unless you are trying to keep it above possible flooding level), otherwise possibly a utility platform or porch-mounted unit, roof-mounted (which can be a combined heating and cooling RTU unit), or push come to shove a utility dormer in the roof for it. Or basement mounted if you hve a dry basement.


Any of those would undoubtedly be way cheaper than raising the whole roof. And pretty much anything is better than putting an HVAC unit in an unconditioned attic space - that is just about the worst possible place to install an A/C unit, and not much better for a furnace either. Your attic must be really low slope, because for an A/C unit you usually only need about 4 foot headroom - using a horizontal air handler, not a vertical configuration one. There are specialty ones, a bit more expensive, out there for flat roofs which will fit in a 30" high space.


Another alternative is a closet-mounted mini-split - building a utility closet (in house or hanging off the outside back wall as a bump-out) for the compressor unit and with the condensor coil/fan exposed to the outside, then refrigerant tubes run through the house to the evaporator/fan units, which are mounted high up on walls - typically 2-3 of those per house in a smallish house though I have seen as many as 6 wall units off a larger (5 ton) unit. Eliminates the retrofitting of ducting in the house (only about 1/4-1/2" tubing has to be run) so generally a LOT cheaper for retrofitting A/C to a house.


Talk to several Heating and A/C (your Search the List category for this type work) companies about your options - which for a small house might even also include independent individual TTW (through-the-wall or "tiny Tim unit" for its small size) zone units - basically like window air conditioners but mounted through the walls, hanging off the outside of the house with very minimal stick-in on the inside, so as to not take up a window.

Answered 1 year ago by LCD




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