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It is generally advised to remove existing roof shingles when mounting brand-new ones. Certain areas in the attic room can present major fire and carcinogen. Prior to air sealing and insulating an attic room, guarantee you or your specialist address the following health and wellness problems. Check the chimney and bordering framing for indicators of charring, residue deposits, falling apart stonework or mortar, or proof that the chimney lining is wearing away.


Have a chimney expert repair, seal and protect it at the exact same time. Generally a void exists where a stonework chimney travels through the attic room. To air seal this location, initially mount sheet metal flashing to bridge this space and after that seal all the joints with a non-combustible sealant (make sure the product is rated for this application).


An air and vapour barrier covers the flooring of the attic room area and is secured to the joists with acoustical sealant.

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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 new insulation to be added. To prevent insulation from dropping behind the shield, attach a clamp-type storm collar without sealant on top of the radiation shield, as received Number 5-4.


A radiation obstacle creates a 75 millimetre or 3-inch air space around the smokeshaft and extends 75 millimetres or 3 inches over the attic room insulation, maintaining the distance from combustible materials. The top of the obstacle is a storm collar secured, not sealed, to the chimney. Over the ceiling, the air and vapour obstacle is covered around the drywall to get in touch with the firestop sealant.


A collar-like ceiling trim plate is attached below the firestop. Standard interior recessed lights are challenging to air seal efficiently and can become a fire threat if covered with insulation.

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As an option to traditional recessed or pot lights take into consideration light-emitting diode (LED) flush or flat place components for better power effectiveness. This also offers the possibility to much better seal and shield the existing dental caries. Ensure that fixture installation directions are adhered to. If you find a significant amount of animal droppings and vermin in the attic room, do not interrupt them due to the fact that they can harbour quickly air-borne moulds, parasite eggs and germs that can trigger severe illness.


Seal the adhering to locations: Around the plumbing pile and any kind of other pipelines. For plastic plumbing stacks that go up and down due to thermal growth, make use of an adaptable gasket or a polyethylene sleeve sealed to a plywood collar (see Figure 5-6). Around cords or ceiling lights that pass through the attic room flooring and partition and exterior wall top plates (see Number 5-7 and Figure 5-8).




Around the chimney. Building codes call for that air rooms between chimneys and flooring or ceiling assemblies where they pass be secured with a non-combustible fire stop (see Figure 5-3 and Number 5-4). Along the side of shared wall surfaces. There is frequently a space between the event wall surface (such as the shared wall surface in between devices in duplexes, triplexes and row houses) 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 frames the electrical box. An electrical cable diverts from the electrical box and down through a hole right into an interior wall. Holes around electrical cables are loaded with caulking or foam sealant, and caulking seals gaps along the top of the interior walls.


After air sealing, attic air flow is your 2nd line of protection against the water vapour that may have located its way right into the attic. It makes sure a colder, well-vented attic room area much less susceptible to the development go of ice dams at the eaves.




You might have to find roof covering or soffit vents from outside if they are not clearly visible from inside the attic. Residences with peaked roofs and available attic rooms are the simplest to air vent by using the ratio of 1 to 300. This ratio describes unhampered vent location to the protected ceiling location.


Likewise, do not use electrical exhaust fans for attic ventilation as these can attract much more air than can be supplied through the soffit vents. This will actually pull house air into the attic, leading to higher heat loss and wetness accumulation. They are additionally prone to failure, noise production and increased energy use.

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The following Components detail the best approach depending on your attic kind. After you have actually examined the attic and carried out any kind of restorative work, emphasis initially on air and moisture control.


On the other hand, spray foam offers air securing and a preliminary layer of premium quality insulation that can be covered approximately the wanted RSI (R) level (Home energy audit). If the attic retrofit is being completed combined with interior renovations, the easiest technique is to install a brand-new, solitary air and vapour obstacle on the bottom of the ceiling joists


Around the chimney. Building regulations call for that air rooms in between smokeshafts and flooring or ceiling settings up through which they pass be secured with a non-combustible fire quit (see Number 5-3 and Figure 5-4). Along the side of common wall surfaces. There is commonly a void between the celebration wall (such as the shared wall surface between systems in duplexes, triplexes and row homes) and the edge of the attic floor.


A hefty polyethylene sheet which is caulked with acoustical sealer and stapled to the ceiling frames the electric box. An electric cord leads away from the electric box and down through a hole into an indoor wall. Holes around electrical wires are filled with caulking or foam sealer, and caulking seals gaps along the top of the indoor wall surfaces.

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


You might have to locate roofing system or soffit vents from outside if they are not plainly noticeable from inside the attic room. Residences with actually peaked roofs and available attic rooms are the easiest to air vent by making use of the proportion of 1 to 300. This proportion describes unobstructed vent location to the shielded ceiling area.


Do not utilize electric exhaust fans for attic air flow as these can attract much more air than can be supplied with the soffit vents. This will really pull house air right into the attic, resulting in better heat loss and wetness build-up. They are also vulnerable to failing, sound manufacturing and boosted energy usage.


The area of vents is as essential as their number and kind. Typically, a blend of types and places will certainly work best. The complying with Components information the most effective method relying on your attic room type. After you have inspected the attic and executed any kind of remedial work, emphasis initially on air and moisture control.

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On the various other hand, spray foam uses air sealing and a preliminary layer of top quality insulation that can be topped up to the desired RSI (R) degree. If the attic room retrofit is being finished combined with indoor restorations, the simplest strategy is to mount a brand-new, single air and vapour barrier on the bottom of the ceiling joists.