WDR Roofing Company Austin - Roof Repair & Replacement
Austin, TX, USA
Rafters are 2x4, 12/twelve slope, along with the roof is complex with intersecting ridge lines, valleys and dormers. (Your house at first had a cedar roof. The deck is the traditional spaced fir planks.) As a consequence of the construction, there is almost no potential for obtaining enough air consumption by using soffit vents. (On top of the layout troubles, you will discover difficulties mainly because all of the spaces between rafters in which they meet up with the top plate were being bricked in, evidently at time of building). Good traditional movement-through underdeck roof air flow will probably be complicated. Once we to start with seemed into this job, the developing inspector asked us to even now use vent channels (low cost polystrene was Alright) to capture regardless of what air flow we could.
A. You will find a code requirement to get a vapor retarder in certain sorts of assemblies, but there's no prerequisite for a vapor barrier. Your layer of rigid foam is by now a vapor retarder. No even further vapor retarding layer must be put in.
Manufacturers of soffit vents and ridge vents generally specify The online free vent area in their products and solutions on product packaging or in requirements available online.
Effectively the roof is going on with the initial layer of insulation (on-major the purlins, under the roof sheeting). There seems to be enough space remaining within the four" purlin cavity for the next layer of R11 to generally be put in without any modification.
I question that the condensation is occurring in opposition to the chilly ridge beam. Alternatively, I feel it is probably going that condensation is going on about the underside of your ridge shingles or maybe the underside of the asphalt felt underlayment.
Your house is at about 4,500 ft. We only get about three' of snow a calendar year and it not often stays about the roof for much more than week a pair moments a year. I'm on an exceptionally restricted spending budget, just trying to make the area livable. Any strategies are welcome.
Yesterday we blew the insulation and installed the SIGA Majcoat within the CAPACES Leadership Institute. There was greater than 8,000 Cubic toes of insulation to install, so our insulators experienced two of their blower trucks and a fantastic crew on website. They had been blowing cellulose as speedy as they could and also the the rain was heading our course. Lower than forty five minutes once the insulation was done we had completed the Majcoat and have been hectic taping seams.
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I obtained a catastrophe of a residence that was partly remodeled, It is really in Zone sixteen (a California designation similar to IRC zones). It's got a 6/twelve vaulted ceiling about the residing/kitchen area area. The roof is held up by two long beams that operate 4 toes out parallel for the ridge , So there isn't any straight air path a the way around the height ridge beam.
2. Install sturdy browse around here website-crafted ventilation baffles in each rafter bay prior to deciding to spray the foam. That way you end up with a vented cathedral ceiling.
Magic bullet position is not reached. It's a layout for any small slope roof. It's greatly along the traces of Doug McEvers usage of high perm fibre board to generate vent channels above dense packed cellulose.
When you install a brand new roof, you'd like to make sure that it lasts for decades. To do this you will need to always retain the services of...
Another concern is, must check out here I proceed precisely the same insulation assembly exterior? The last picture shows a large 10' overhang. Ought to I vent this exterior portion or seal the underside in the p.t. plywood deck with the shut-cell insulation?
I happen to be using rigid breadboard design and style expanded polystyrene during the rim joists and thought the same may very well be set underneath the sheathing in between the rafter bays, and with any gaps sealed with a urethane spray foam for example Fill and Seal. Is there a quality which makes spray foam acceptable and rigid foam unacceptable?