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It is commonly recommended to remove existing shingles when installing brand-new ones. Specific areas in the attic can position major fire and carcinogen. Prior to air sealing and insulating an attic, ensure you or your contractor address the following health and wellness problems. Inspect the chimney and surrounding mounting for indications of charring, soot deposits, crumbling stonework or mortar, or proof that the chimney cellular lining is deteriorating.


Have a smokeshaft specialist fixing, seal and protect it at the same time. Generally a void exists where a masonry smokeshaft goes through the attic. To air seal this area, initially mount sheet steel flashing to connect this void and after that secure all the joints with a non-combustible sealant (ensure the product is rated for this application).


An air and vapour barrier covers the flooring of the attic room and is secured to the joists with acoustical sealer. Factory-built metal smokeshafts ought to be maintained from calling insulation by a minimum 75 mm (3 in.) unless or else specified by maker or local authorities. Install a non-flammable radiation guard that preserves a 75-mm (3-in.) air room between the chimney and insulation.

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The top of the radiation shield must also be a minimum of 75 mm (3 in.) greater than the level of existing or brand-new insulation to be included. To avoid insulation from falling back the shield, connect a clamp-type storm collar without sealer on top of the radiation guard, as shown in Figure 5-4.


A radiation barrier produces a 75 millimetre or 3-inch air area around the chimney and prolongs 75 millimetres or 3 inches above the attic insulation, maintaining the distance from combustible materials. The top of the barrier is a storm collar secured, not secured, to the chimney. Above the ceiling, the air and vapour barrier is twisted around the drywall to get in touch with the firestop sealant.


A collar-like ceiling trim plate is attached below the firestop. Job securely around electric wiring (shut off the power). Seek advice from an electrical professional if doubtful circuitry or rusty electric connections are present. Common interior recessed lights are tough to air seal properly and can come to be a fire danger if covered with insulation.

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As a choice to standard recessed or pot lights take into consideration light-emitting diode (LED) flush or flat place fixtures for much better power efficiency. This also supplies the opportunity to much better seal and shield the existing cavity. Make sure that fixture setup guidelines are followed. If you discover a significant amount of pet droppings and vermin in the attic room, do not disturb them since they can harbour conveniently airborne moulds, bloodsucker eggs and microorganisms that can trigger severe health problem.


Seal the adhering to locations: Around the pipes pile and any kind of various other pipes. For plastic plumbing stacks that move up and down because of thermal growth, use a flexible gasket or a polyethylene sleeve sealed to a plywood collar (see Figure 5-6). Around wires or ceiling lighting fixtures that pass through the attic room flooring and dividers and exterior wall top plates (see Figure 5-7 and Figure 5-8).

Around the chimney. Building regulations call for that air areas between chimneys and floor or ceiling settings up whereby they pass be sealed with a non-combustible fire stop (see Number 5-3 and Number 5-4). Along the side of shared walls. There is usually a gap between the party wall surface (such as the common wall surface between units in duplexes, triplexes and row houses) and the side of the attic room flooring.

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A heavy polyethylene sheet which is caulked with acoustical sealer and stapled to the ceiling encases the electric box. An electrical cable leads away from the electrical box and down with a hole into an indoor wall. Openings around electrical cables are filled up with caulking or foam sealant, and caulking seals spaces along the top of the indoor walls.


After air find out here now securing, attic air flow is your 2nd line of defence against the water vapour that may have discovered its means into the attic. It makes sure a chillier, well-vented attic room room less susceptible to the formation of ice dams at the eaves.




You might need to locate roof or soffit vents from outdoors if they are not clearly noticeable from inside the attic room. Residences with actually peaked roofings and easily accessible attic rooms are the easiest to air vent by making use of the proportion of 1 to 300. This ratio refers to unobstructed vent area to the shielded ceiling location.


Likewise, do not use electrical exhaust followers for attic room air flow as these can draw a lot more air than can be provided with the soffit vents. This will actually draw home air into the attic room, leading to greater warmth loss and dampness buildup. They are likewise prone to failing, noise manufacturing and increased power use.

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The area of vents is as crucial as their number and kind. Usually, a mix of kinds and locations will certainly work best. The complying with Components detail the most effective approach depending upon your attic room type. After you have checked the attic room and lugged out any type of therapeutic job, focus first on air and wetness control.


On the other hand, spray foam provides air sealing and a preliminary layer of high top quality insulation that can be topped approximately the desired RSI (R) level (Attic insulation). If the attic retrofit is being completed in conjunction with interior restorations, the easiest method is to set up a new, single air and vapour barrier on the underside of the ceiling joists

Around the smokeshaft. Building codes need 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 Number 5-4). Along the edge of common walls. There is usually a void in 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 floor.


A heavy polyethylene sheet which is caulked with acoustical sealer and stapled to the ceiling encloses the electrical box. An electrical cord leads away from the electrical box and down with a hole into an interior wall surface. Holes around electrical cords are loaded with caulking or foam sealer, and caulking seals gaps along the top of the interior walls.

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After air sealing, attic ventilation is your 2nd line of protection versus the water vapour that may have found its way into the attic room. It makes certain a chillier, well-vented attic space less susceptible to the formation of ice dams at the eaves.


You might need to locate roof or soffit vents from outside if they are not clearly noticeable from inside the attic. Houses with actually peaked roof coverings and accessible attic rooms are the easiest to vent by utilizing the proportion of 1 to 300. This proportion refers to unhampered air vent area to the shielded ceiling area.


Do not make use of electrical exhaust fans for attic room air flow as these can draw a lot more air than can be supplied via the soffit vents. This will in fact pull residence air into the attic room, leading to higher heat loss and dampness build-up. They are also susceptible to failing, sound manufacturing and increased power use.

The location of vents is as vital as their number and type. Commonly, a combination of kinds and places will work best. The complying with Parts detail the most effective strategy relying on your attic room kind. After you have checked the attic room and accomplished any kind of therapeutic job, emphasis first on air and wetness control.

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On the other hand, spray foam provides air securing and a preliminary layer of top quality insulation that can be covered as much as the preferred RSI (R) level. If the attic room retrofit is being completed along with interior renovations, the easiest method is to install a brand-new, single air and vapour obstacle on the underside of the ceiling joists.