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It is normally advised to remove existing shingles when installing new ones. Particular areas in the attic can pose major fire and carcinogen. Before air sealing and shielding an attic room, ensure you or your specialist address the following health and safety and security concerns. Inspect the chimney and bordering mounting for indications of charring, soot down payments, collapsing masonry or mortar, or evidence that the chimney cellular lining is degrading.


Have a chimney specialist repair work, seal and protect it at the same time. Frequently a gap exists where a masonry chimney goes through the attic. To air seal this location, first mount sheet metal flashing to connect this gap and afterwards seal all the joints with a non-combustible sealer (make sure the item is ranked for this application).


An air and vapour barrier covers the floor of the attic room and is secured to the joists with acoustical sealer. Factory-built metal chimneys should be maintained from calling insulation by a minimum 75 mm (3 in.) unless otherwise defined by supplier or local authorities. Mount a non-flammable radiation guard that preserves a 75-mm (3-in.) air space between the chimney and insulation.

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The top of the radiation shield should likewise be a minimum of 75 mm (3 in.) greater than the level of existing or new insulation to be included. To protect against insulation from falling back the shield, attach a clamp-type storm collar without sealant at the top of the radiation guard, as received Figure 5-4.


A radiation barrier develops a 75 millimetre or 3-inch air room around the chimney and prolongs 75 millimetres or 3 inches over the attic room insulation, preserving the distance from combustible products. The top of the obstacle is a storm collar secured, not secured, to the smokeshaft. Over the ceiling, the air and vapour barrier is covered around the drywall to speak to the firestop sealer.


A collar-like ceiling trim plate is connected below the firestop. Work safely around electric circuitry (turn off the power). Seek advice from with an electrical contractor if questionable circuitry or rusty electrical connections exist. Common indoor recessed lights are hard to air seal effectively and can become a fire threat if covered with insulation.

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As a choice to standard recessed or pot lights think about light-emitting diode (LED) flush or level install fixtures for much better energy performance. This likewise offers the possibility to far better seal and protect the existing dental caries. Ensure that fixture setup guidelines are complied with. If you discover a significant amount of pet droppings and vermin in the attic, do not disturb them due to the fact that they can harbour conveniently air-borne moulds, bloodsucker eggs and bacteria that can cause severe ailment.


Seal the complying with areas: Around the plumbing stack and any type of various other pipelines. For plastic pipes heaps that go up and down because of thermal development, use a flexible gasket or a polyethylene sleeve sealed to a plywood collar (see Number 5-6). Around wires or ceiling lighting fixtures that permeate the attic room flooring and dividing and outside wall top plates (see Number 5-7 and Figure 5-8).

Around the smokeshaft. Structure codes call for that air rooms in between smokeshafts and flooring or ceiling settings up whereby they pass be secured with a non-combustible fire quit (see Number 5-3 and Number 5-4). Along the side of common walls. There is typically a gap in between the celebration wall surface (such as the shared wall surface in between units in duplexes, triplexes and row homes) and the edge of the attic floor.

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


After air securing, attic room air flow is your second line of defence versus the water vapour that may have found its means into the attic. It makes sure a cooler, well-vented attic room room less prone to the formation of ice dams at the eaves.




You might need to situate roof covering or soffit vents from outdoors go if they are not clearly noticeable from inside the attic. Homes with peaked roof coverings and available attic rooms are the easiest to air vent by using the ratio of 1 to 300. This proportion describes unhampered vent area to the protected ceiling location.


Do not make use of electrical exhaust fans for attic air flow as these can draw more air than can be provided with the soffit vents. This will really pull house air right into the attic room, leading to better warmth loss and dampness accumulation. They are also vulnerable to failure, sound manufacturing and raised 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 function best. The following Components information the very best strategy depending upon your attic room type. After you have checked the attic and performed any therapeutic job, emphasis initially on air and dampness control.


On the other hand, spray foam uses air securing and a first layer of premium quality insulation that can be topped up to the preferred RSI (R) degree (Home energy efficiency). If the attic room retrofit is being completed in conjunction with interior improvements, the simplest strategy is to install a new, solitary air and vapour obstacle on the bottom of the ceiling joists

Structure codes require that air areas in between chimneys and flooring or ceiling settings up with which they pass be secured with a non-combustible fire quit (see Figure 5-3 and Number 5-4). There is frequently a void between the celebration wall (such as the common wall surface between systems in duplexes, triplexes and row houses) and the side of the attic flooring.


A hefty polyethylene sheet which is caulked with acoustical sealant and stapled to the ceiling frames the electric box. An electrical cord diverts from the electric box and down through an opening right into an indoor wall. Openings around electrical cords are loaded with caulking or foam sealer, and caulking seals voids along the top of the interior walls.

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Attic ventilation serves a number of objectives. It decreases summertime warmth buildup, extending the life of roof and reduces a/c lots. After air securing, attic ventilation is your 2nd line of support versus the water vapour that might have located its means right into the attic. It guarantees a chillier, well-vented attic space much less vulnerable to the development of ice dams at the eaves.


You may need to find roofing or soffit vents from outside if they are not plainly visible from inside the attic. Residences with actually peaked roofings and obtainable attic rooms are the most convenient to air vent by utilizing the ratio of 1 to 300. This proportion refers to unobstructed air vent area to the insulated ceiling location.


Do not make use of electric exhaust fans for attic room air flow as these can attract more air than can be supplied through the soffit vents. This will actually pull house air into the attic, causing greater heat loss and wetness buildup. They are additionally prone to failing, sound production and boosted energy use.

The area of vents is as important as their number and kind. Commonly, a mixture of types and places will certainly work best. The adhering to Components detail the very best approach depending on your attic type. After you have checked the attic room and carried out any kind of therapeutic work, focus initially on air and dampness control.

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On the various other hand, spray foam uses air sealing and an initial layer of excellent quality insulation that can be topped as much as the wanted RSI (R) degree. If the attic room retrofit is being finished combined with interior renovations, the simplest technique is to set up a new, single air and vapour obstacle on the bottom of the ceiling joists.