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It is normally recommended to remove existing shingles when installing new ones. Specific locations in the attic room can pose significant fire and health dangers. Before air sealing and protecting an attic, guarantee you or your specialist address the complying with health and security worries. Inspect the smokeshaft and bordering framing for indicators of charring, residue deposits, crumbling stonework or mortar, or evidence that the chimney cellular lining is degrading.


Have a chimney specialist fixing, seal and insulate it at the exact same time. Frequently a space exists where a stonework chimney passes through the attic. To air seal this area, first mount sheet steel flashing to link this void and after that seal all the joints with a non-combustible sealer (ensure the product is rated for this application).


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

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The top of the radiation shield ought to additionally be a minimum of 75 mm (3 in.) greater than the degree of existing or new insulation to be added. To stop insulation from falling behind the guard, attach a clamp-type tornado collar without sealant at the top of the radiation shield, as received Figure 5-4.


A radiation obstacle develops a 75 millimetre or 3-inch air room around the smokeshaft and expands 75 millimetres or 3 inches above the attic room insulation, preserving the distance from flammable products. The top of the obstacle is a tornado collar secured, not sealed, to the chimney. Over the ceiling, the air and vapour obstacle is covered around the drywall to speak to the firestop sealant.


A collar-like ceiling trim plate is attached below the firestop. Job securely around electric circuitry (turn off the power). Seek advice from an electrical service provider if suspicious circuitry or rusty electric links are present. Typical indoor recessed lights are tough to air seal effectively and can end up being a fire risk if covered with insulation.

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This additionally offers the opportunity to far better seal and protect the existing dental caries. If you find a considerable quantity of pet droppings and vermin in the attic room, do not disturb them since they can harbour conveniently air-borne moulds, bloodsucker eggs and germs that can create severe disease.


Seal the adhering to locations: Around the plumbing pile and any other pipes. For plastic plumbing stacks that go up and down due to thermal growth, utilize an adaptable gasket or a polyethylene sleeve secured to a plywood collar (see Number 5-6). Around cords 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 smokeshaft. Building codes require that air spaces in between smokeshafts and flooring or ceiling settings up where they pass be secured with a non-combustible fire quit (see Number 5-3 and Figure 5-4). Along the side of common walls. There is frequently a gap between the celebration wall surface (such as the common wall between units in duplexes, triplexes and row homes) and the edge of the attic flooring.

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A heavy polyethylene sheet which is caulked with acoustical sealer and stapled to the ceiling encloses the electrical box. An electric wire diverts from the electrical box and down via a hole right into an interior wall surface. Openings around electrical cords are loaded with caulking or foam sealer, and caulking seals gaps along the top of the indoor walls.


After air securing, attic ventilation is your 2nd line of defence against the water vapour that may have discovered its means into the attic. It ensures a colder, well-vented attic area much less susceptible to the development of ice dams at the eaves.




You may have to find roofing or soffit vents from outdoors if they are not clearly visible from inside the attic. Houses with peaked roofing systems and available attics he said are the easiest to vent by utilizing the ratio of 1 to 300. This ratio describes unhampered vent location to the insulated ceiling area.


Do not make use of electric exhaust followers for attic ventilation as these can draw more air than can be provided with the soffit vents. This will actually pull home air right into the attic room, leading to greater warmth loss and wetness accumulation. They are also susceptible to failure, sound manufacturing and boosted energy usage.

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The following Parts information the best method depending on your attic room kind. After you have actually inspected the attic and lugged out any kind of remedial work, emphasis first on air and wetness control.


On the other hand, spray foam supplies air securing and a preliminary layer of excellent quality insulation that can be covered up to the desired RSI (R) level (HVAC installation). If the attic room retrofit is being completed together with interior improvements, the simplest technique is to mount a new, solitary air and vapour obstacle on the bottom of the ceiling joists


Building codes require that air areas between smokeshafts and floor or ceiling settings up through which they pass be sealed with a non-combustible fire quit (see Number 5-3 and Number 5-4). There is commonly a gap between the event wall (such as the common wall surface between systems in duplexes, triplexes and row residences) and the side of the attic room floor.


A hefty polyethylene sheet which is caulked with acoustical sealer and stapled to the ceiling encases the electric box. An electric wire diverts from the electric box and down through a hole right into an indoor wall. Holes around electrical cords are full of caulking or foam sealant, and caulking seals voids along the top of the indoor walls.

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After air securing, attic room air flow is your second line of defence versus the water vapour that might have discovered its way into the attic room. It ensures a cooler, well-vented attic space less vulnerable to the formation of ice dams at the eaves.


You may have to situate roofing system or soffit vents from outside if they are not clearly visible from inside the attic room. Homes with peaked roofs and easily accessible attics are the most convenient to air vent by utilizing the proportion of 1 to 300. This ratio refers to unblocked vent area to the insulated ceiling location.


Do not use electrical exhaust fans for attic room air flow as these can draw a lot more air than can be supplied with the soffit vents. This will actually draw house air right into the attic, causing greater warmth loss and wetness accumulation. They are additionally susceptible to failing, noise manufacturing and boosted power use.


The complying with Parts detail the ideal strategy depending on your attic room kind. After you have examined the attic and lugged out any kind of restorative job, focus first on air and dampness control.

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On the other hand, spray foam supplies air sealing and a first layer of top quality insulation that can be topped approximately the preferred RSI (R) degree. If the attic retrofit is being finished along with interior renovations, the simplest method is to mount a new, solitary air and vapour barrier on the underside of the ceiling joists.