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It is usually advised to remove existing roof shingles when installing new ones. Specific locations in the attic can present serious fire and health and wellness threats. Before air sealing and shielding an attic, ensure you or your service provider address the following health and wellness concerns. Inspect the smokeshaft and surrounding mounting for signs of charring, soot down payments, collapsing masonry or mortar, or evidence that the smokeshaft lining is weakening.


Have a smokeshaft specialist fixing, seal and insulate it at the same time. Generally a gap exists where a masonry chimney travels through the attic. To air seal this location, initially mount sheet steel blinking to connect this space and after that seal all the joints with a non-combustible sealant (guarantee the product is rated for this application).


An air and vapour obstacle covers the flooring of the attic room area and is sealed to the joists with acoustical sealer. Factory-built steel smokeshafts ought to be avoided getting in touch with insulation by a minimum 75 mm (3 in.) unless otherwise defined by supplier or neighborhood authorities. Mount a non-flammable radiation shield that maintains a 75-mm (3-in.) air room in between the smokeshaft and insulation.

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


A radiation barrier develops a 75 millimetre or 3-inch air area around the smokeshaft and prolongs 75 millimetres or 3 inches over the attic insulation, maintaining the range from flammable materials. The top of the obstacle is a storm collar secured, not secured, to the chimney. Over the ceiling, the air and vapour barrier is covered around the drywall to get in touch with the firestop sealer.


A collar-like ceiling trim plate is attached below the firestop. Standard interior recessed lights are difficult to air seal properly and can come to be a fire risk if covered with insulation.

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This likewise offers the chance to better seal and protect the existing cavity. If you locate a significant quantity of pet droppings and vermin in the attic, do not interrupt them since they can harbour conveniently airborne moulds, bloodsucker eggs and microorganisms that can trigger severe illness.


Seal the complying with areas: Around the pipes stack and any kind of various other pipelines. For plastic plumbing heaps that go up and down because of thermal expansion, make use of a versatile gasket or a polyethylene sleeve sealed to a plywood collar (see Number 5-6). Around cords or ceiling light fixtures that penetrate the attic floor and dividing and exterior wall surface leading plates (see Number 5-7 and Figure 5-8).

Around the smokeshaft. Building codes require that air areas between chimneys and floor or ceiling settings up where they pass be secured with a non-combustible fire quit (see Number 5-3 and Number 5-4). Along the edge of shared walls. There is often a gap between the party wall (such as the shared wall between units in duplexes, triplexes and row houses) 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 encases the electric box. An electric wire leads away from the electrical box and down via an opening into an indoor wall. Openings around electrical cords are loaded with caulking or foam sealant, and caulking seals voids along the top of the interior wall surfaces.


Attic ventilation offers a variety of purposes. It lowers summer season warm build-up, extending the life of roof covering and minimizes air conditioning unit lots. After air sealing, attic room ventilation is your second line of protection against the water vapour that might have discovered its means into the attic room - Spray foam insulation. It makes certain a chillier, well-vented attic room area less susceptible to the formation of ice dams at the eaves.




You might need to locate roof covering or soffit vents from outside if they are not clearly visible from inside the attic. Houses with peaked roof coverings and available attics are the simplest to vent why not find out more by utilizing the proportion of 1 to 300. This proportion describes unblocked air vent area to the protected ceiling area.


Do not use electrical exhaust followers for attic ventilation as these can attract more air than can be provided through the soffit vents. This will really pull residence air right into the attic, causing better warmth loss and wetness build-up. They are likewise prone to failure, sound manufacturing and boosted power use.

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The complying with Parts detail the finest approach depending on your attic room type. After you have examined the attic and carried out any type of therapeutic work, focus initially on air and moisture control.


On the other hand, spray foam offers air sealing and a preliminary layer of top quality insulation that can be topped approximately the wanted RSI (R) level (Radiant barriers). If the attic retrofit is being finished along with indoor remodellings, the easiest technique is to install a brand-new, solitary air and vapour obstacle on the bottom of the ceiling joists

Structure codes require that air rooms between smokeshafts and flooring or ceiling settings up through which they pass be secured with a non-combustible fire stop (see Number 5-3 and Number 5-4). There is often a void between the event wall (such as the shared wall in between units in duplexes, triplexes and row residences) and the edge of the attic room floor.


A heavy polyethylene sheet which is caulked with acoustical sealer and stapled to the ceiling frames the electric box. An electrical cable leads away from the electric box and down with an opening into an indoor wall surface. Holes around electric wires are full of caulking or foam sealant, and caulking seals spaces along the top of the indoor walls.

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Attic ventilation offers a variety of purposes. It lowers summer warm accumulation, prolonging the life of roof and lowers air conditioning unit tons. After air sealing, attic ventilation is your second line of defence against the water vapour that may have found its way into the attic. It guarantees a chillier, well-vented attic room area less prone to the formation of ice dams at the eaves.


You may have to locate roofing or soffit vents from outside if they are not clearly visible from inside the attic room. Residences with actually peaked roof coverings and accessible attics are the easiest to vent by utilizing the ratio of 1 to 300. This ratio refers to unblocked vent area to the insulated ceiling area.


Also, do not utilize electric exhaust followers for attic room air flow as these can attract more air than can be provided via the soffit vents. This will actually draw residence air right into the attic, resulting in greater warmth loss and dampness build-up. They are likewise susceptible to failing, noise manufacturing and boosted energy use.

The place of vents is as vital as their number and type. Usually, a mix of kinds and locations will certainly function best. The following Components information the very best strategy relying on your attic kind. After you have actually examined the attic room and performed any therapeutic work, focus initially on air and dampness control.

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On the other hand, spray foam offers air securing and a first layer of excellent quality insulation that can be topped up to the wanted RSI (R) degree. If the attic retrofit is being completed together with indoor renovations, the simplest strategy is to mount a new, solitary air and vapour obstacle on the underside of the ceiling joists.