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It is commonly recommended to eliminate existing roof shingles when installing new ones. Certain locations in the attic room can pose major fire and carcinogen. Before air securing and protecting an attic room, guarantee you or your service provider address the following health and safety and security worries. Examine the smokeshaft and surrounding mounting for signs of charring, soot deposits, falling apart masonry or mortar, or proof that the chimney cellular lining is deteriorating.


Have a smokeshaft specialist fixing, seal and protect it at the exact same time. Typically a void exists where a masonry smokeshaft goes through the attic. To air seal this area, first set up sheet metal flashing to bridge this gap 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 floor of the attic room space and is secured to the joists with acoustical sealant. Factory-built metal smokeshafts need to be avoided getting in touch with insulation by a minimum 75 mm (3 in.) unless or else specified by manufacturer or neighborhood authorities. Install a non-flammable radiation shield that maintains a 75-mm (3-in.) air room between the smokeshaft and insulation.

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


A radiation barrier creates a 75 millimetre or 3-inch air room around the smokeshaft and extends 75 millimetres or 3 inches above the attic insulation, keeping the range from combustible products. The top of the barrier is a tornado collar secured, not secured, to the chimney. Above the ceiling, the air and vapour obstacle is twisted around the drywall to contact the firestop sealant.


A collar-like ceiling trim plate is attached listed below the firestop. Basic interior recessed lights are hard to air seal effectively and can come to be a fire threat if covered with insulation.

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This also uses the possibility to much better seal and insulate the existing tooth cavity. If you locate a substantial amount of animal droppings and vermin in the attic room, do not disturb them since they can harbour conveniently air-borne moulds, bloodsucker eggs and germs that can trigger severe ailment.


Seal the following areas: Around the plumbing stack and any other pipelines. For plastic plumbing heaps that go up and down due to thermal expansion, utilize a versatile gasket or a polyethylene sleeve secured to a plywood collar (see Figure 5-6). Around cables or ceiling lights that penetrate the attic floor and partition and outside wall leading plates (see Number 5-7 and Figure 5-8).




Around the chimney. Building ordinance call for that air spaces between smokeshafts and floor or ceiling assemblies via which they pass be sealed with a non-combustible fire stop (see Figure 5-3 and Number 5-4). Along the edge of shared walls. There is frequently 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 address the attic room floor.

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


After air securing, attic ventilation is your 2nd line of support versus the water vapour that might have found its way into the attic. It makes sure a chillier, well-vented attic room room less vulnerable to the formation of ice dams at the eaves.




You might have to find roof or soffit vents from outdoors if they are not plainly visible from inside the attic. Residences with actually peaked roofings and obtainable attics are the easiest to air vent by utilizing the proportion of 1 to 300. This proportion refers to unblocked vent area to the protected ceiling location.


Additionally, do not utilize electric exhaust followers for attic air flow as these can attract much more air than can be supplied through the soffit vents. This will really pull house air right into the attic room, causing better heat loss and dampness buildup. They are also vulnerable to failing, noise production and boosted energy use.

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The following Components detail the ideal method depending on your attic kind. After you have actually inspected the attic and brought out any kind of remedial job, emphasis initially on air and dampness control.


On the various other hand, spray foam uses air sealing and a first layer of top quality insulation that can be topped approximately the wanted RSI (R) level (Home energy audit). If the attic room retrofit is being finished combined with interior remodellings, the most convenient method is to set up a brand-new, solitary air and vapour obstacle on the bottom of the ceiling joists


Structure codes require that air spaces between chimneys and floor or ceiling assemblies through which they pass be secured with a non-combustible fire quit (see Number 5-3 and Number 5-4). There is frequently a void in between the party wall surface (such as the common wall between units in duplexes, triplexes and row homes) and the side of the attic flooring.


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

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After air sealing, attic room ventilation is your second line of support against the water vapour that may have discovered its way into the attic room. It makes certain a colder, well-vented attic space less prone to the development of ice dams at the eaves.


You might need to locate roofing system or soffit vents from outdoors if they are not clearly noticeable from inside the attic room. Houses with peaked roofings and easily accessible attics are the simplest to air vent by using the proportion of 1 to 300. This proportion refers to unblocked vent area to the shielded ceiling location.


Do not use electric exhaust fans for attic ventilation as these can draw much more air than can be supplied via the soffit vents. This will in fact pull house air right into the attic, resulting in higher warm loss and wetness buildup. They are also vulnerable to failure, noise manufacturing and boosted power use.


The complying with Parts detail the best approach depending on your attic type. After you have inspected the attic room and brought out any type of remedial job, emphasis first on air and moisture control.

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On the other hand, spray foam uses air sealing and a first layer of high quality insulation that can be covered as much as the wanted RSI (R) level. If the attic room retrofit is being finished in conjunction with interior remodellings, the easiest technique is to install a brand-new, solitary air and vapour barrier on the bottom of the ceiling joists.