The particular style demonstrated was for any Passive Dwelling. The roof thickness & utilization of a service cavity may well look like overkill for some tasks, but If you need an airtight lid, a assistance cavity can get you there - forever... And enable you to wire and light the interior.
If you install 2x4s (or 2x3s on edge, mounted with long screws) perpendicular on the rafters, you can address the majority of the thermal bridging worry without the should increase a layer of rigid foam.
Taking a look at the lethal pic I experience there is likely to be a simple although unorthodox Alternative. The many rot from warm damp air meets cold Wooden is correct close to where by a vented hip may have averted all and WITHOUT vent chutes.
This article will go over insulated sloped roofs. The solutions explained below can be used to build an insulated cathedral ceiling around a fantastic room, a section of sloped roof over a kneewall, or any equivalent section of insulated sloped roof.
My comprehension as I read this web site is that I don't have to worry about creating an air channel higher than the sheathed portion due to the rigid foam.
Make sure to put in insulation that provides at the very least the minimum code necessity for ceiling R-benefit. Insulation that exceeds the minimal code necessity is better yet.
one. It's always a foul idea to setup an HRV within an attic. HRVs should be accessible enough with the homeowners to routinely change the filter.
I see your place. I have not labored with fiberboard. Can it's taped and considered a trustworthy Key air barrier?
I'm a homeowner with cathedral ceilings that were included throughout remodeling and growth of my home in the late 90s. Just the ridge beam is exposed. The rest of the ceiling is covered with drywall. With the many years There have been some condensation leak down the aspect on the ridge beam on some mornings in March/April.The home is about 4 miles from your coast in Southern Califonia, so zone 3b. You will discover 4 recessed lights in the ceiling on the aspect in the beam that gets the condensation, but You can also find lights around the aspect that is always dry. There is not any air con in the house. Warmth is applied in the course of the evening only a couple of dozen evenings a yr, not through the condensation. Generally the Home windows are open. It seems the condensation exhibits up on mornings when there isn't any maritime layer (no clouds each morning) along with the temperature heats up rather early following a really cool night. The problem ceiling faces east/west along with the condensation is over the east facing side in the beam. look at here now The roof is black asphalt shingle. I am aware that there's no caulk/sealant concerning the facet of your beam as well as the spot where the drywall butts versus it, so There's a modest air gap there.
Thorsten Chlupp is inside of a much more challenging climate and he appears to be page carrying out wonderful with very simple unfastened fill on the attic floor....obviously He's working with "ample" amounts (cellulose galore)and he has baffles near the soffit.
Using ventilated nailbase panels is a superbly good way to create a cathedral ceiling. Precisely the same procedures utilize as when using SIPs: make certain that the seams are sealed being as airtight as you may make them, and make certain that the total R-worth of your roof assembly satisfies or exceeds least code R-value needs.
Therefore the issue is: seal the stucco vents and add the spray foam roof and Don't be concerned about condensation? You can find very little reduced-hanging fruit in our type of design, Specially on existing houses, Which explains why consumers are being sucked to the spray foam roof rip-off.
Your weblogs on this topic are already really practical and I appreciate your assistance. ( I do review ahead of I submit inquiries : )
two. It looks like that you are applying metal beams to frame your hips. As I am certain you understand, these metal beams are thermal bridges. All insulation needs to be on the exterior side with the steel.