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It is commonly suggested to get rid of existing shingles when installing new ones. Particular locations in the attic room can position significant fire and carcinogen. Before air sealing and protecting an attic room, ensure you or your service provider address the complying with health and safety and security issues. Inspect the chimney and surrounding mounting for indicators of charring, soot deposits, falling apart stonework or mortar, or evidence that the smokeshaft cellular lining is degrading.


Have a chimney specialist fixing, seal and protect it at the very same time. Frequently a gap exists where a stonework chimney passes through the attic. To air seal this location, initially set up sheet metal flashing to connect this space and afterwards secure all the joints with a non-combustible sealer (make sure the product is rated for this application).


An air and vapour barrier covers the flooring of the attic space and is sealed to the joists with acoustical sealer.

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


A radiation barrier produces 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 range from flammable products. The top of the barrier is a storm collar secured, not secured, to the smokeshaft. Above the ceiling, the air and vapour obstacle is twisted around the drywall to get in touch with the firestop sealant.


A collar-like ceiling trim plate is affixed below the firestop. Common interior recessed lights are hard to air seal effectively and can end up being a fire hazard if covered with insulation.

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This also uses the opportunity to better seal and shield the existing cavity. If you locate a significant amount of pet droppings and vermin in the attic, do not interrupt them since they can harbour easily air-borne moulds, parasite eggs and germs that can create extreme disease.


Seal the complying with areas: Around the pipes pile and any kind of various other pipelines. For plastic pipes heaps that relocate up and down due to thermal growth, make use of a flexible gasket or a polyethylene sleeve secured to a plywood collar (see Figure 5-6). Around cords or ceiling light fixtures that permeate the attic floor and dividers and exterior wall surface leading plates (see Number 5-7 and Figure 5-8).




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

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


After air sealing, attic room air flow is your 2nd line of support versus the water vapour that may have discovered its means right into the attic room. It ensures a colder, well-vented attic space less vulnerable to the development of ice dams at the eaves.




You may have to situate roofing or soffit vents from outside if they are not clearly noticeable from inside the attic room. Homes with actually peaked roofings and accessible attic rooms are the easiest to air vent by utilizing the proportion of 1 to 300. This ratio describes unobstructed air vent area to the shielded ceiling area.


Additionally, do not utilize electric exhaust fans for attic ventilation as these can attract more air than can be supplied via the soffit vents. This will in fact pull home air into the attic, resulting in greater warmth loss and moisture buildup. They are also susceptible to failure, noise production and increased power use.

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The following Parts information the best technique depending on your attic type. After you have checked the attic and carried out any type of restorative work, emphasis first on air and dampness control.


On the other hand, spray foam uses air securing and a preliminary layer of premium quality insulation that can be topped approximately the wanted RSI (R) degree (Attic insulation). If the attic room retrofit is being completed along with interior improvements, the simplest strategy is to set up a brand-new, single air and vapour obstacle on the bottom of the ceiling joists


Building codes require that air areas in between chimneys and floor or ceiling settings up via which they pass be secured with a non-combustible fire stop (see Number 5-3 and Figure 5-4). There is typically a void between the celebration wall surface (such as the shared wall in between devices in duplexes, triplexes and row residences) and the side of the attic room floor.


A hefty polyethylene sheet which is caulked with acoustical sealant and stapled to the ceiling encloses the electrical box. An electrical cord diverts from the electric box and down with an opening right into an indoor wall. Holes around electrical cables are full of caulking or foam sealant, and caulking seals voids along the top of the indoor walls.

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After air sealing, attic room air flow is your second line of defence against the water vapour that may have discovered its method into the attic. It makes sure a colder, well-vented attic room less vulnerable to the formation of ice dams at the eaves.


You might need to find roof or soffit vents from outdoors if they are not plainly noticeable from inside the attic room. Residences with peaked roofs and available attics are the simplest to air vent by utilizing the proportion of 1 to 300. This proportion refers to unblocked vent area to the shielded ceiling location.


Additionally, do not make use of electrical exhaust followers for attic room air flow as these can draw a lot more air than can be supplied through the soffit vents. This will actually draw house air into the attic room, resulting in better warm loss and dampness buildup. They are likewise susceptible to failing, sound production and raised energy usage.


The complying with Parts detail the finest approach depending on your attic room type. After you have inspected the attic room and lugged out any kind of therapeutic job, emphasis see initially on air and moisture control.

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On the various other hand, spray foam supplies air securing and a first layer of high top quality insulation that can be covered approximately the desired RSI (R) level. If the attic retrofit is being completed along with indoor remodellings, the most convenient approach is to mount a new, solitary air and vapour barrier on the bottom of the ceiling joists.