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WDR Roofing Company Austin - Roof Repair & Replacement
Austin, TX, USA
http://austinroofingcompany.org
+1 512-820-1332

The air leakage that Dana described would keep the roof dry, but would undermine its thermal overall performance.

A vented cathedral ceiling only is sensible if the geometry of your roof is easy. You will need a straight shot through the soffits into the ridge. That’s relatively straightforward with a gable roof without any dormers or skylights, but If your geometry of the roof is intricate — with features like hips, valleys, and dormers — it’s unattainable to assure air circulation by way of all of your rafter bays.

Thanks all over again for your answers. Now I just will need to search out an installer in this area who appreciates whatever they're carrying out (up to now it's been iffy)!

In keeping with segment R806.three of your 2006 International Residential Code (IRC), “At least a one-inch Room shall be supplied involving the insulation as well as the roof sheathing and in the location from the vent.” This type of vent Area is usually established by setting up one inch by 1 inch “sticks” in the upper corners of each rafter bay, accompanied by stiff cardboard, slender plywood, OSB, fiberboard sheathing, or panels of rigid foam insulation.

My house built in 63 below in Ohio features a cathedral ceiling with no ventilation. In actual fact there several cross-supports managing perpendicular to the primary joists together with other framing factors that would make this unfeasible. So I want to make it an effective unvented roof. Half of the roof has 2x8 joists and the opposite fifty percent has 2x12s. At this time You will find there's membrane covering (rubber) that's labored perfectly for over twenty years but is exhibiting signs of deterioration and could need replacing quickly. Getting finished remodeling on The within and going for walks within the roof I am aware that lots of the sheeting really should be replaced along with the little insulation that is there now. We've experienced condensation concerns before so I now there are air infiltration and bridging issues.

With This method , there isn't any troubles with an entire peel-stick roof underlayment in addition to the deck is there? I have a metal roof on this job along with the underlayment will likely be entirely adhered on the roof sheathing.

Q. "You say 'You don't need an interior vapor barrier,' but you also say that 'you need a superior air barrier on both sides of one's fiberglass batts.' The latter would turn into an interior vapor barrier not so?"

I'm such as a photograph of the answer: spray foam held down in the prime edge of the rafters so that air may be drawn up from soffit vents to gable vents in the truncated attic cavity.

As for my Electrical power auditor recommending blowing cellulose in the mansard sides, You furthermore may recommend versus that? I used to be underneath the impression blown cellulose prevents moisture migration.

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I'm a homeowner with cathedral ceilings that over at this website ended up added all through reworking and expansion of my house during the late 90s. Only the ridge beam is exposed. The rest of the ceiling is roofed with drywall. Through the a long time There's been some condensation leak down the facet of the ridge beam on some mornings in March/April.The home is about 4 miles from your coast in Southern Califonia, so see this site zone 3b. You will find four recessed lights while in the ceiling about the aspect on the beam that receives the condensation, but Additionally, there are lights on the aspect that is always dry. There is absolutely no air conditioning in the house. Heat is made use of over the night time only about a dozen evenings a 12 months, not in the course of the condensation. Generally the Home windows are open. It appears the condensation shows up on mornings when there isn't any marine layer (no clouds each morning) as well as the temperature heats up fairly early following a very awesome night. The issue ceiling faces east/west and also the condensation is about the east facing side from the beam. The roof is black asphalt shingle. I am aware that there is no caulk/sealant among the side of your beam plus the put wherever the drywall butts in opposition to it, so There's a compact air hole there.

We plan to transform to an improperly vented cathedral ceiling to an unvented 1. Sealing up the soffit vents is usually a no-brainer. What's the best approach to offer with the ridge vent? Thanks!

To circumvent moist interior air from making contact with chilly surfaces near the ridge, You will need a actual air barrier and an actual insulation layer. The right way to repair this problem is to expose the rafter bays -- either from above or beneath, It is really your selection -- and pull out the fiberglass insulation. Place the fiberglass in a dumpster. Then fill the rafter bays with spray polyurethane foam.

A. Both approach will operate, as long as you receive at least the bare minimum code R-value for the roof, and as long as you use development methods that pay attention to airtightness.

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