Our Green Attics PDFs

Our Green Attics PDFs

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Specific locations in the attic can present significant fire and health dangers. Before air sealing and protecting an attic room, guarantee you or your contractor address the adhering to wellness and security problems.


Have a chimney expert repair work, seal and shield it at the exact same time. Frequently a void exists where a masonry smokeshaft travels through the attic room. To air seal this location, initially mount sheet steel flashing to link this space and afterwards secure all the joints with a non-combustible sealant (make certain the product is rated for this application).


An air and vapour barrier covers the floor of the attic space and is sealed to the joists with acoustical sealer.

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The top of the radiation shield must also be a minimum of 75 mm (3 in.) greater than the degree of existing or new insulation to be added. To avoid insulation from falling back the guard, attach a clamp-type storm collar without sealant on top of the radiation guard, as displayed in Number 5-4.


A radiation obstacle produces a 75 millimetre or 3-inch air room around the smokeshaft and prolongs 75 millimetres or 3 inches over the attic room insulation, preserving the range from combustible products. The top of the obstacle is a storm collar secured, not secured, to the smokeshaft. Above the ceiling, the air and vapour barrier is wrapped around the drywall to call the firestop sealant.


A collar-like ceiling trim plate is affixed listed below the firestop. Work safely around electric circuitry (turn off the power). Talk to an electric specialist if questionable wiring or rusty electrical connections are present. Typical indoor recessed lights are challenging to air seal effectively and can become a fire danger if covered with insulation.

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As an alternative to traditional recessed or pot lights think about light-emitting diode (LED) flush or flat install components for better energy effectiveness. This additionally provides the possibility to better seal and protect the existing cavity. Ensure that fixture installment instructions are followed. If you locate a substantial quantity of animal droppings and vermin in the attic room, do not disturb them since they can harbour quickly air-borne moulds, parasite eggs and germs that can create severe ailment.


Seal the following areas: Around the pipes stack and any type of various other pipes. For plastic pipes stacks that move up and down because of thermal expansion, use a versatile gasket or a polyethylene sleeve secured to a plywood collar (see Number 5-6). Around wires or ceiling lights that permeate the attic room floor and dividing and exterior wall top plates (see Figure 5-7 and Figure 5-8).




Building codes require that air spaces in between chimneys and floor or ceiling settings up with which they pass be sealed with a non-combustible fire quit (see Figure 5-3 and Figure 5-4). There is typically a gap in between the party wall surface (such as the common wall surface between units in duplexes, triplexes and row homes) and the side of the attic room floor.

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A hefty polyethylene sheet which is caulked with acoustical sealant and stapled to the ceiling encases the electrical box. An electrical wire leads away from the electric box and down with a hole into an interior wall surface. Holes around electric cables are filled with caulking or foam sealer, and caulking seals voids along the top of the interior walls.


Attic air flow serves a number of purposes. It lowers summer warmth buildup, prolonging the life of roofing and reduces ac unit loads. After air sealing, attic room ventilation is your second line of protection versus the water vapour that might have found its method right into the attic room - HVAC installation. It guarantees a cooler, well-vented attic area much less susceptible to the formation of ice dams at the eaves.




You might need to locate roofing or soffit vents from outdoors if they are not clearly visible from inside the attic. Residences with actually peaked roofs and obtainable attics are the easiest to air vent by making use of the ratio of 1 to 300. This proportion describes unblocked vent area to the shielded ceiling area.


Additionally, do not use electrical exhaust fans for attic room air flow as these can draw a lot more air than can be provided through the soffit vents. This will actually pull house air into the attic room, resulting in greater warm loss and moisture accumulation. They are additionally prone to failure, sound production and enhanced energy usage.

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The area of vents is as essential as their number and type. Typically, a mix of types and locations will function best. The following Parts information the ideal method depending on your attic type. After you have actually inspected the attic and accomplished any restorative job, emphasis initially on air and moisture control.


On the various other hand, spray foam provides air sealing and a first layer of high quality insulation that can be topped approximately the desired RSI (R) degree (HVAC maintenance). If the attic room retrofit is being finished together with indoor renovations, the simplest method is to mount a brand-new, solitary air and vapour obstacle on the bottom of the ceiling joists


Structure codes need that air spaces in between chimneys and flooring or ceiling assemblies through which they pass be sealed with a non-combustible fire quit (see Number 5-3 and Figure 5-4). There is often a void in between the party wall (such as the common wall between systems in duplexes, triplexes and row houses) and the side of the attic room floor.


A hefty polyethylene sheet which is caulked with acoustical sealer and stapled to the ceiling frames the electrical box. An electrical wire diverts from the electrical box and down through an opening into an interior wall surface. Openings around electric wires are full of caulking or foam sealer, and caulking seals gaps along the top of the indoor walls.

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After air securing, attic room air flow is your 2nd line of support against the water vapour that may have located its method into the attic. It ensures a colder, well-vented attic room area much less vulnerable to the development of ice dams at the eaves.


You may have to find roofing system or soffit vents from outside if they are not plainly noticeable from inside the attic room. Houses with actually peaked roofings and easily accessible attic rooms are the easiest to air vent by utilizing the ratio of 1 to 300. This proportion describes unobstructed air vent location to the shielded ceiling area.


Do not make use of over at this website electrical exhaust followers for attic room ventilation as these can draw much more air than can be supplied via the soffit vents. This will really draw home air into the attic room, leading to higher heat loss and moisture buildup. They are likewise susceptible to failure, noise manufacturing and boosted energy usage.


The following Parts information the finest approach depending on your attic type. After you have actually inspected the attic and lugged out any therapeutic work, focus first on air and dampness control.

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On the other hand, spray foam supplies air sealing and an initial layer of top quality insulation that can be topped up to the wanted RSI (R) level. If the attic retrofit is being finished combined with interior remodellings, the most convenient strategy is to mount a new, single air and vapour barrier on the bottom of the ceiling joists.

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