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It is normally recommended to eliminate existing roof shingles when setting up brand-new ones. Specific locations in the attic can posture serious fire and wellness hazards. Before air securing and insulating an attic, guarantee you or your service provider address the adhering to health and safety worries. Examine the smokeshaft and bordering framing for indications of charring, soot down payments, crumbling masonry or mortar, or evidence that the chimney cellular lining is wearing away.


Have a chimney specialist repair work, seal and protect it at the exact same time. Frequently a void exists where a stonework smokeshaft travels through the attic room. To air seal this location, initially mount sheet steel blinking to connect this space and afterwards secure all the joints with a non-combustible sealer (guarantee the product is ranked for this application).


An air and vapour barrier covers the floor of the attic room room and is secured to the joists with acoustical sealant. Factory-built metal smokeshafts must be maintained from getting in touch with insulation by a minimal 75 mm (3 in.) unless or else defined by supplier or local authorities. Install a non-flammable radiation shield that preserves a 75-mm (3-in.) air space between the smokeshaft and insulation.

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The top of the radiation guard ought to additionally 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 behind the guard, connect a clamp-type storm collar without sealer on top of the radiation shield, as displayed in Number 5-4.


A radiation barrier creates a 75 millimetre or 3-inch air room around the smokeshaft and prolongs 75 millimetres or 3 inches above the attic insulation, maintaining the distance from flammable materials. The top of the barrier is a tornado collar clamped, not secured, to the chimney. Above the ceiling, the air and vapour barrier is twisted around the drywall to speak to the firestop sealant.


A collar-like ceiling trim plate is connected listed below the firestop. Work securely around electric wiring (switch off the power). Consult with an electric professional if doubtful circuitry or corroded electric connections are existing. Common indoor recessed lights are tough to air seal efficiently and can become a fire threat if covered with insulation.

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This also supplies the opportunity to far better seal and insulate the existing cavity. If you find a substantial amount of pet droppings and vermin in the attic, do not disturb them because they can harbour quickly air-borne moulds, bloodsucker eggs and microorganisms that can trigger extreme disease.


Seal the complying with areas: Around the pipes pile and any kind of various other pipes. For plastic plumbing stacks that go up and down because of thermal growth, make use of a flexible gasket or a polyethylene sleeve sealed to a plywood collar (see Figure 5-6). Around wires or ceiling lights that penetrate the attic flooring and partition and exterior wall top plates (see Figure 5-7 and Figure 5-8).

Structure codes require that air areas between smokeshafts and flooring or ceiling settings up with which they pass be sealed with a non-combustible fire stop (see Figure 5-3 and Figure 5-4). There is commonly a void in between the event wall surface (such as the shared wall between devices in duplexes, triplexes and row residences) and the side of the attic room floor.

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A heavy polyethylene sheet which is caulked with acoustical sealant and stapled to the ceiling encloses the electric box. An electrical cable diverts from the electrical box and down with a hole into an indoor wall. Openings around electrical wires are loaded with caulking or foam sealant, and caulking seals voids along the top of the indoor walls.


Attic ventilation offers a number of purposes. It reduces summer season warm buildup, extending the life of roof covering and minimizes a/c unit loads. After air sealing, attic room air flow is your 2nd line of defence versus the water vapour that might have discovered its way right into the attic room - Home energy audit. It guarantees a chillier, well-vented attic area much less prone to the formation of ice dams at the eaves.




You may need to situate roofing or soffit vents from outdoors if they are not clearly noticeable from inside the attic. Houses with actually peaked roof coverings and available attics are the easiest to air vent by making use of the ratio of 1 to 300. This ratio describes unobstructed vent location to the insulated ceiling location.


Do not utilize electrical exhaust fans for attic ventilation as these can attract more air than can be supplied via the soffit vents. This will in fact draw home air right into the attic room, resulting in better heat loss and wetness buildup. They are likewise susceptible to failure, noise manufacturing and raised energy usage.

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The area of vents is as vital as their number and kind. Typically, a mixture of kinds and places will work best. The complying with Parts information the best strategy depending upon your attic room type. After you have inspected the attic and executed any restorative work, emphasis initially on air and dampness control.


On the various other hand, spray foam uses air securing and a preliminary layer of excellent quality insulation that can be topped approximately the desired RSI (R) level (Attic insulation). If the attic room retrofit is being completed combined with indoor renovations, the simplest strategy is to install a brand-new, single air and vapour barrier on the bottom of the ceiling joists

Around the smokeshaft. Building regulations require that air areas between smokeshafts and flooring or ceiling assemblies through which they pass be secured with a non-combustible fire quit (see Figure 5-3 and Figure 5-4). Along the side of shared wall surfaces. There is usually a space in between the event wall surface (such as the common wall surface between systems in duplexes, triplexes and row homes) and the edge of the attic room floor.


A hefty polyethylene sheet which is caulked with acoustical sealer and stapled to the ceiling encloses the electric box. An electric cable diverts from the electrical box and down with an opening right into an indoor wall. Openings around electrical cables are loaded with Resources caulking or foam sealer, and caulking seals voids along the top of the interior wall surfaces.

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Attic air flow offers a number of functions. It minimizes summertime warm buildup, extending the life of roof and lowers air conditioning unit tons. After air securing, attic room air flow is your 2nd line of defence against the water vapour that might have found its method right into the attic room. It ensures a colder, well-vented attic area much less susceptible to the development of ice dams at the eaves.


You might have to locate roofing system or soffit vents from outdoors if they are not plainly visible from inside the attic. Homes with actually peaked roofs and easily accessible attics are the simplest to vent by utilizing the ratio of 1 to 300. This ratio refers to unblocked vent area to the protected ceiling area.


Do not use electrical exhaust followers for attic room air flow as these can attract more air than can be supplied through the soffit vents. This will really draw home air right into the attic, resulting in higher warm loss and dampness buildup. They are additionally susceptible to failure, sound manufacturing and increased power use.

The complying with Components information the ideal strategy depending on your attic room type. After you have actually inspected the attic and carried out any therapeutic job, emphasis initially on air and wetness control.

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On the other hand, spray foam offers air securing and a first layer of high top quality insulation that can be topped up to the desired RSI (R) degree. If the attic room retrofit is being finished in combination with indoor restorations, the most convenient technique is to set up a new, solitary air and vapour barrier on the bottom of the ceiling joists.