Has anyone insulated their roof?

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Location: Anaheim CA

Has anyone insulated their roof?

Postby Birdwelliot » Mon Dec 16, 2013 5:56 pm

We have a Cliff May-style open-beam MCM. The place is a solar oven in summer and heating goes straight out the top of the roof in winter. Is this just one of downsides of finally living in our dream house?

Mondo Lounge Lizard
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Location: Long Beach CA

Postby egads » Mon Dec 16, 2013 8:50 pm


To insulate, you need to be replacing the roof. That assumes it's actually open beam and not drywalled. If there is drywall over rafters then there probably is insulation in there. Around my neighborhood the way to insulate is to add a foil faced foam insulation board over the base of the torn off roof with a layer of plywood over that and then roofing material.
In my house we just run the furnace too much and try to close whatever window covering we have. In the summer I have added screen doors and try to open everything up. A stand of bamboo along the south side of the lot has made a big difference. Just thinned it to let in winter warmth. But what I really want is a new energy efficient HVAC system.....

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Postby Joe » Fri Dec 27, 2013 3:51 pm

most Cliff May prefabs used sheet rock on the ceiling, only exposing the ridge beams and side beams. I know a few homes in Long Beach got open ceilings as a builder's choice.

Fortunately, my Cliff May prefab in Oregon got the sheetrock ceiling. I was able to remove the ceiling and place R-30 foil backed rigid insulation between the 6 inch joists, then resheetrock the ceiling. the difference in heating and cooling is significant.

Also, consider the color of your roof with a cathedral ceiling. you'll want a while roof, be it rock or membrane.


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