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It is usually recommended to get rid of existing shingles when setting up brand-new ones. Specific locations in the attic can present major fire and health hazards. Before air securing and shielding an attic, ensure you or your specialist address the following health and wellness and safety and security problems. Check the smokeshaft and bordering mounting for signs of charring, soot deposits, collapsing stonework or mortar, or evidence that the chimney cellular lining is degrading.


Have a chimney expert repair work, seal and protect it at the very same time. Typically a space exists where a masonry chimney passes through the attic room. To air seal this location, initially set up sheet steel blinking to link this void and afterwards secure all the joints with a non-combustible sealant (make sure the item 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 sealant. Factory-built metal smokeshafts need to be maintained from getting in touch with insulation by a minimal 75 mm (3 in.) unless or else defined by supplier or neighborhood authorities. Mount a non-flammable radiation shield that keeps a 75-mm (3-in.) air space in between the chimney and insulation.

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The top of the radiation guard ought to additionally be a minimum of 75 mm (3 in.) greater than the degree of existing or brand-new insulation to be included. To avoid insulation from falling behind the shield, connect a clamp-type storm collar without sealer on top of the radiation shield, as received Number 5-4.


A radiation barrier develops a 75 millimetre or 3-inch air room around the smokeshaft and prolongs 75 millimetres or 3 inches over the attic insulation, keeping the distance from flammable materials. The top of the obstacle is a storm collar clamped, not sealed, to the smokeshaft. Above the ceiling, the air and vapour obstacle is wrapped around the drywall to speak to the firestop sealant.


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

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This also uses the opportunity to much better seal and shield the existing tooth cavity. If you locate a considerable quantity of animal droppings and vermin in the attic, do not interrupt them since they can harbour easily air-borne moulds, parasite eggs and germs that can cause severe health problem.


Seal the following locations: Around the plumbing pile and any kind of 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 sealed to a plywood collar (see Number 5-6). Around cords or ceiling light fixtures that penetrate the attic flooring and partition and exterior wall top plates (see Figure 5-7 and Figure 5-8).




Around the chimney. Structure codes call for that air rooms in between chimneys and floor or ceiling settings up where they pass be sealed with a non-combustible fire quit (see Figure 5-3 and Figure 5-4). Along the edge of shared wall surfaces. There is typically a space in between the event wall surface (such as the shared wall surface between devices in duplexes, triplexes and row homes) and the side 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 electrical box. An electrical wire diverts from the electrical box and down via an opening into an interior wall surface. Holes around electric cords are full of caulking or foam sealer, and caulking seals spaces along the top of the interior walls.


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




You may need to locate roofing or soffit vents visit the site from outdoors if they are not plainly noticeable from inside the attic room. Residences with peaked roofing systems and easily accessible attic rooms are the most convenient to air vent by utilizing the proportion of 1 to 300. This proportion describes unhampered air vent area to the shielded ceiling location.


Do not use electric exhaust followers for attic room air flow as these can draw much more air than can be provided via the soffit vents. This will in fact pull house air into the attic, resulting in greater heat loss and dampness buildup. They are also prone to failing, sound production and enhanced power use.

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The complying with Components detail the finest technique depending on your attic type. After you have actually examined the attic room and lugged out any type of remedial job, emphasis first on air and moisture control.


On the other hand, spray foam provides air securing and a first layer of premium quality insulation that can be covered up to the preferred RSI (R) degree (Solar attic fans). If the attic retrofit is being finished together with interior restorations, the most convenient approach is to set up a brand-new, solitary air and vapour obstacle on the underside of the ceiling joists


Around the chimney. Structure codes need that air rooms between smokeshafts and floor or ceiling assemblies via which they pass be secured with a non-combustible fire quit (see Number 5-3 and Figure 5-4). Along the side of shared walls. There is typically a space between the event wall (such as the common wall surface between units in duplexes, triplexes and row residences) and the edge of the attic room floor.


A hefty polyethylene sheet which is caulked with acoustical sealant and stapled to the ceiling encases the electric box. An electrical cord leads away from the electric box and down via an opening into an interior wall surface. Holes around electric cables are full of caulking or foam sealer, and caulking seals gaps along the top of the interior wall surfaces.

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After air sealing, attic room ventilation is your 2nd line of support against the water vapour that may have discovered its means right into the attic. It makes certain a chillier, well-vented attic room room much less susceptible to the formation of ice dams at the eaves.


You might need to find roof or soffit vents from outdoors if they are not clearly visible from inside the attic. Houses with peaked roofings and obtainable attic rooms are the most convenient to vent by utilizing the proportion of 1 to 300. This ratio refers to unobstructed air vent location to the protected ceiling area.


Also, do not make use of electric exhaust followers for attic room ventilation as these can attract more air than can be provided with the soffit vents. This will actually draw home air into the attic, leading to greater warm loss and moisture buildup. They are also vulnerable to failing, sound manufacturing and raised power usage.


The location of vents is as essential as their number and type. Commonly, a blend of kinds and areas will work best. The following Parts detail the very best strategy relying on your attic room kind. After you have evaluated the attic and accomplished any restorative job, emphasis first on air and wetness control.

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On the various other hand, spray foam provides air sealing and a first layer of top quality insulation that can be topped approximately the wanted RSI (R) level. If the attic room retrofit is being finished in conjunction with interior remodellings, the most convenient method is to mount a brand-new, single air and vapour barrier on the bottom of the ceiling joists.