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It is usually recommended to get rid of existing roof shingles when mounting brand-new ones. Specific areas in the attic can pose severe fire and health and wellness risks. Before air sealing and shielding an attic, ensure you or your service provider address the complying with wellness and safety worries. Examine the chimney and surrounding mounting for indicators of charring, soot deposits, falling apart stonework or mortar, or evidence that the chimney lining is wearing away.


Have a chimney professional fixing, seal and protect it at the exact same time. Frequently a void exists where a stonework smokeshaft passes with the attic room. To air seal this location, initially set up sheet metal flashing to connect this void and afterwards secure all the joints with a non-combustible sealer (make sure the item is ranked for this application).


An air and vapour obstacle covers the flooring of the attic area and is sealed to the joists with acoustical sealant. Factory-built metal smokeshafts need to be maintained from contacting insulation by a minimum 75 mm (3 in.) unless otherwise defined by manufacturer or neighborhood authorities. Mount a non-flammable radiation guard that preserves a 75-mm (3-in.) air area between the chimney and insulation.

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The top of the radiation guard ought to also be a minimum of 75 mm (3 in.) more than the level of existing or brand-new insulation to be included. To stop insulation from falling back the shield, affix a clamp-type storm collar without sealer at the top of the radiation guard, as shown in Number 5-4.


A radiation barrier creates a 75 millimetre or 3-inch air area around the chimney and prolongs 75 millimetres or 3 inches above the attic room insulation, maintaining the range from combustible products. The top of the barrier is a tornado collar secured, not sealed, to the chimney. Over the ceiling, the air and vapour barrier is twisted around the drywall to call the firestop sealant.


A collar-like ceiling trim plate is attached listed below the firestop. Job safely around electric wiring (shut off the power). Talk to an electric specialist if questionable circuitry or corroded electric connections exist. Basic interior recessed lights are difficult to air seal effectively and can come to be a fire danger if covered with insulation.

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As an option to traditional recessed or pot lights consider light-emitting diode (LED) flush or level install fixtures for far better energy efficiency. This also offers the possibility to far better seal and protect the existing cavity. Ensure that component setup directions are followed. If you find a considerable quantity of pet droppings and vermin in the attic, do not disturb them because they can harbour easily air-borne moulds, bloodsucker eggs and germs that can trigger serious health problem.


Seal the complying with locations: Around the plumbing stack and any kind of other pipelines. For plastic plumbing stacks that move up and down as a result of thermal expansion, utilize a versatile gasket or a polyethylene sleeve secured to a plywood collar (see Figure 5-6). Around cords or ceiling lighting fixtures that pass through the attic room floor and dividers and exterior wall leading plates (see Number 5-7 and Number 5-8).




Around the chimney. Building ordinance require that air spaces between chimneys and floor or ceiling settings up where they pass be sealed with a non-combustible fire stop (see Figure 5-3 and Figure 5-4). Along the edge of shared walls. There is often a gap between the celebration wall surface (such as the common wall between systems in duplexes, triplexes and row residences) and the side of the attic room flooring.

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A heavy polyethylene sheet which is caulked with acoustical sealant and stapled to the ceiling encases the electric box. An electric cable leads away from the electric box and down through an opening right into an interior wall surface. Holes around electric cables are filled up with caulking or foam sealer, and caulking seals spaces along the top of the interior wall surfaces.


Attic ventilation offers a variety of purposes. It lowers summer season warm buildup, lengthening the life of roof and reduces a/c tons. After air securing, attic air flow is your second line of defence versus the water vapour that might from this source have discovered its way right into the attic room - HVAC maintenance. It guarantees a cooler, well-vented attic room less vulnerable to the formation of ice dams at the eaves.




You may need to situate roof or soffit vents from outside if they are not clearly visible from inside the attic. Homes with actually peaked roof coverings and accessible attics are the simplest to vent by utilizing the proportion of 1 to 300. This ratio refers to unobstructed air vent location to the shielded ceiling location.


Additionally, do not make use of electrical exhaust followers for attic room air flow as these can attract extra air than can be supplied with the soffit vents. This will actually pull residence air right into the attic room, leading to higher heat loss and moisture accumulation. They are also vulnerable to failing, sound production and enhanced energy use.

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The following Parts information the best strategy depending on your attic kind. After you have checked the attic and brought out any kind of remedial job, focus first on air and dampness control.


On the other hand, spray foam provides air securing and an initial layer of excellent quality insulation that can be covered up to the preferred RSI (R) degree (Duct cleaning). If the attic room retrofit is being finished combined with interior improvements, the easiest technique is to mount a new, single air and vapour obstacle on the bottom of the ceiling joists


Building codes call for that air areas between smokeshafts and floor or ceiling assemblies through which they pass be secured with a non-combustible fire stop (see Figure 5-3 and Figure 5-4). There is often a void in between the celebration wall (such as the shared wall in between systems in duplexes, triplexes and row homes) and the edge of the attic room flooring.


A hefty polyethylene sheet which is caulked with acoustical sealer and stapled to the ceiling encloses the electric box. An electrical cord leads away from the electric box and down with an opening into an indoor wall. Holes around electric wires are loaded with caulking or foam sealant, and caulking seals voids along the top of the interior wall surfaces.

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After air sealing, attic air flow is your second line of support against the water vapour that might have discovered its means into the attic. It guarantees a chillier, well-vented attic space less prone to the development of ice dams at the eaves.


You may need to situate roof or soffit vents from outdoors if they are not plainly noticeable from inside the attic room. Houses with peaked roofing systems and easily accessible attic rooms are the simplest to vent by utilizing the ratio of 1 to 300. This ratio describes unobstructed vent area to the shielded ceiling area.


Do not utilize electric exhaust followers for attic room ventilation as these can attract extra air than can be provided with the soffit vents. This will actually draw home air into the attic room, causing higher heat loss and moisture buildup. They are additionally vulnerable to failure, noise manufacturing and boosted energy use.


The complying with Parts detail the ideal approach depending on your attic kind. After you have inspected the attic room and carried out any type of restorative work, focus first on air and wetness control.

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On the other hand, spray foam supplies air securing and a preliminary layer of high quality insulation that can be topped approximately the preferred RSI (R) level. If the attic room retrofit is being finished in conjunction with interior renovations, the most convenient technique is to set up a new, solitary air and vapour barrier on the bottom of the ceiling joists.