Our Green Attics PDFs

Our Green Attics PDFs

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Green Attics Fundamentals Explained

Specific locations in the attic can present major fire and wellness dangers. Before air sealing and protecting an attic room, ensure you or your contractor address the complying with wellness and safety problems.


Have a chimney expert repair, seal and insulate it at the same time. Frequently a gap exists where a stonework smokeshaft goes through the attic room. To air seal this area, first install sheet steel flashing to bridge this void and afterwards seal all the joints with a non-combustible sealer (guarantee the product is rated for this application).


An air and vapour barrier covers the floor of the attic room area and is secured to the joists with acoustical sealant. Factory-built metal chimneys must be kept from speaking to insulation by a minimal 75 mm (3 in.) unless otherwise defined by supplier or neighborhood authorities. Set up a non-flammable radiation guard that keeps a 75-mm (3-in.) air space in between the smokeshaft and insulation.

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The top of the radiation guard need to additionally be a minimum of 75 mm (3 in.) greater than the level of existing or new insulation to be added. To avoid insulation from dropping behind the guard, connect a clamp-type tornado collar without sealer at the top of the radiation guard, as displayed in Figure 5-4.


A radiation barrier creates a 75 millimetre or 3-inch air space around the smokeshaft and expands 75 millimetres or 3 inches over the attic room insulation, maintaining the range from combustible materials. The top of the barrier is a tornado collar secured, not secured, to the chimney. Over the ceiling, the air and vapour obstacle is covered around the drywall to call the firestop sealant.


A collar-like ceiling trim plate is connected below the firestop. Standard interior recessed lights are difficult to air seal successfully and can come to be a fire risk if covered with insulation.

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This likewise provides the possibility to far better seal and protect the existing cavity. If you find a significant quantity of pet droppings and vermin in the attic room, do not interrupt them because they can harbour quickly airborne moulds, bloodsucker eggs and microorganisms that can create severe ailment.


Seal the adhering to areas: Around the pipes pile and any type of various other pipes. For plastic plumbing stacks that relocate up and down due to thermal expansion, utilize a flexible gasket or a polyethylene sleeve secured to a plywood collar (see Number 5-6). Around cables or ceiling lighting fixtures that permeate the attic room floor and dividers and exterior wall surface top plates (see Figure 5-7 and Figure 5-8).




Structure codes call for that air rooms in between chimneys and floor or ceiling assemblies through which they pass be sealed with a non-combustible fire stop (see Number 5-3 and Figure 5-4). There is often a space between the party wall surface (such as the common wall surface in between devices in duplexes, triplexes and row homes) and the side of the attic floor.

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A heavy polyethylene sheet which is caulked with acoustical sealer and stapled to the ceiling frames the electrical box. An electrical cord diverts from the electrical box and down with an opening into an indoor wall surface. Openings around electric cables are filled with caulking or foam sealant, and caulking seals voids along the top of the interior walls.


Attic air flow offers a number of functions. It decreases summertime warmth accumulation, prolonging the life Website of roof covering and decreases a/c lots. After air sealing, attic room ventilation is your 2nd line of defence against the water vapour that might have found its means into the attic room - Duct cleaning. It makes sure a cooler, well-vented attic room space less vulnerable to the development of ice dams at the eaves.




You may have to find roof covering or soffit vents from outdoors if they are not plainly noticeable from inside the attic room. Residences with peaked roofs and obtainable attic rooms are the simplest to vent by utilizing the proportion of 1 to 300. This ratio refers to unobstructed vent location to the shielded ceiling area.


Additionally, do not use electrical exhaust followers for attic room air flow as these can attract a lot more air than can be provided via the soffit vents. This will in fact draw house air into the attic, causing higher warm loss and dampness accumulation. They are also susceptible to failing, noise production and enhanced power usage.

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The complying with Parts information the best approach depending on your attic room kind. After you have actually checked the attic room and brought out any kind of remedial job, focus first on air and moisture control.


On the various other hand, spray foam offers air sealing and a preliminary layer of high top quality insulation that can be covered approximately the wanted RSI (R) level (Solar attic fans). If the attic retrofit is being finished combined with indoor improvements, the most convenient technique is to mount a brand-new, single air and vapour barrier on the bottom of the ceiling joists


Around the chimney. Building ordinance need that air spaces in between chimneys and floor or ceiling assemblies via which they pass be secured with a non-combustible fire stop (see Figure 5-3 and Number 5-4). Along the edge of shared walls. There is typically a void between the party wall surface (such as the shared wall surface between devices in duplexes, triplexes and row homes) and the side of the attic room flooring.


A hefty polyethylene sheet which is caulked with acoustical sealer and stapled to the ceiling encases the electrical box. An electrical cord leads away from the electric box and down via a hole into an indoor wall surface. Openings around electric cords are loaded with caulking or foam sealant, and caulking seals voids along the top of the indoor wall surfaces.

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Attic air flow offers a variety of functions. It lowers summer warm buildup, extending the life of roof covering and lowers ac unit lots. After air sealing, attic room ventilation is your 2nd line of support against the water vapour that may have discovered its means right into the attic. It guarantees a colder, well-vented attic area less vulnerable to the development of ice dams at the eaves.


You might have to situate roof or soffit vents from outdoors if they are not plainly noticeable from inside the attic. Residences with actually peaked roofing systems and accessible attics are the simplest to vent by utilizing the proportion of 1 to 300. This ratio describes unhampered vent area to the protected ceiling location.


Also, do not utilize electrical exhaust followers for attic room ventilation as these can draw more air than can be supplied through the soffit vents. This will really pull home air right into the attic room, causing greater warmth loss and moisture buildup. They are likewise prone to failure, sound manufacturing and enhanced energy use.


The place of vents is as vital as their number and type. Usually, a mix of kinds and locations will work best. The following Components information the ideal method relying on your attic type. After you have examined the attic and accomplished any kind of restorative job, focus first on air and moisture control.

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On the various other hand, spray foam offers air securing and a first layer of premium quality insulation that can be covered up to the preferred RSI (R) level. If the attic retrofit is being completed along with interior improvements, the easiest approach is to install a new, single air and vapour barrier on the bottom of the ceiling joists.

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