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It is commonly recommended to get rid of existing roof shingles when installing brand-new ones. Particular locations in the attic room can present major fire and health and wellness threats. Before air sealing and protecting an attic, guarantee you or your service provider address the adhering to health and wellness and security issues. Examine the smokeshaft and bordering framing for indicators of charring, soot deposits, crumbling stonework or mortar, or proof that the smokeshaft cellular lining is degrading.


Have a chimney specialist fixing, seal and shield it at the exact same time. Commonly a void exists where a masonry smokeshaft passes via the attic. To air seal this location, initially mount sheet metal blinking to connect this gap and after that seal all the joints with a non-combustible sealer (ensure the item is ranked for this application).


An air and vapour obstacle covers the floor of the attic room and is sealed to the joists with acoustical sealant. Factory-built steel smokeshafts should be maintained from speaking to insulation by a minimum 75 mm (3 in.) unless or else specified by supplier or regional authorities. Mount a non-flammable radiation shield that preserves a 75-mm (3-in.) air space in between the smokeshaft and insulation.

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The top of the radiation shield should likewise be a minimum of 75 mm (3 in.) greater than the degree of existing or new insulation to be added. To avoid insulation from falling back the guard, affix a clamp-type storm collar without sealer at the top of the radiation shield, as shown in Figure 5-4.


A radiation obstacle creates a 75 millimetre or 3-inch air space around the smokeshaft and extends 75 millimetres or 3 inches above the attic insulation, preserving the range from combustible materials. The top of the obstacle is a storm collar clamped, not sealed, to the smokeshaft. Over 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 listed below the firestop. Job securely around electrical wiring (shut off the power). Seek advice from an electric contractor if questionable electrical wiring or corroded electrical links are existing. Conventional interior recessed lights are hard to air seal efficiently and can become a fire danger if covered with insulation.

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This likewise uses the possibility to far better seal and insulate the existing dental caries. If you locate a substantial quantity of pet droppings and vermin in the attic, do not disturb them because they can harbour conveniently air-borne moulds, bloodsucker eggs and microorganisms that can create severe illness.


Seal the following locations: Around the plumbing stack and any kind of various other pipes. For plastic pipes heaps that go up and down as a result of thermal expansion, use an adaptable gasket or a polyethylene sleeve sealed to a plywood collar (see Figure 5-6). Around cables or ceiling lights that permeate the attic room flooring and partition and exterior wall surface leading plates (see Figure 5-7 and Number 5-8).




Building codes need that air spaces in between chimneys and floor or ceiling assemblies through which they pass be sealed with a non-combustible fire quit (see Number 5-3 and Figure 5-4). There is often a space between the celebration wall surface (such as the shared wall in between units in duplexes, triplexes and row residences) and the edge of the attic 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 leads away from the electric box and down with a hole right into an indoor wall. Openings around electrical cords are loaded with caulking or foam sealant, and caulking seals spaces along the top of the indoor walls.


After air securing, attic room ventilation is your second line of protection versus the water vapour that might have located its way into the attic. It ensures a colder, well-vented attic area less susceptible to the development of ice dams at the eaves.




You may have to situate roofing or soffit vents from outdoors if they are not clearly visible from inside the attic room. Homes with peaked roof coverings and easily accessible attics are the easiest to air vent by utilizing the ratio of 1 to 300. This ratio describes unhampered vent location to the shielded ceiling location.


Do not utilize electric exhaust fans for attic room ventilation as these can attract more air than can be supplied via the soffit vents. This will actually pull residence air into the attic room, resulting in higher warmth loss and moisture accumulation. They are likewise vulnerable to failure, sound manufacturing and enhanced energy usage.

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The following Parts detail the ideal technique depending on your attic room type. After you have inspected the attic and carried out any therapeutic job, emphasis first on air and moisture control.


On the various other hand, spray foam offers air sealing and a first layer of top quality insulation that can be topped as much as the preferred RSI (R) level (Solar attic fans). If the attic retrofit is being finished in conjunction with interior renovations, the easiest approach is to install a brand-new, single air and vapour obstacle on the bottom of the ceiling joists


Building codes need that air areas in between smokeshafts and flooring or ceiling assemblies via which they pass be secured with a non-combustible fire quit (see Number 5-3 and Number 5-4). There is usually a gap in between the celebration wall surface (such as the shared wall surface in between units in duplexes, triplexes and row houses) and the side of the attic floor.


A hefty polyethylene sheet which is caulked with acoustical sealant and stapled to the ceiling frames the electrical box. An electrical cable diverts from the electric box and down via an opening into an indoor wall surface. Openings around electrical cords are loaded with caulking or foam sealant, and caulking seals spaces along the top of the interior wall surfaces.

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Attic ventilation offers a variety of functions. It minimizes summertime heat buildup, prolonging the life of roof covering and lowers a/c tons. After air securing, attic air flow is your second line of protection against the water vapour that might have found its method right into the attic. It makes certain a chillier, well-vented attic room room less susceptible to the development of ice dams at the eaves.


You may need to locate roofing system or soffit vents from outdoors if they are not plainly visible useful link from inside the attic room. Residences with peaked roofing systems and available attic rooms are the simplest to air vent by utilizing the ratio of 1 to 300. This proportion describes unhampered vent area to the shielded ceiling area.


Also, do not utilize electric exhaust followers for attic air flow as these can attract much more air than can be provided via the soffit vents. This will in fact draw home air right into the attic, causing higher warm loss and dampness buildup. They are also susceptible to failure, noise production and boosted energy use.


The location of vents is as essential as their number and type. Frequently, a mixture of kinds and locations will certainly function best. The adhering to Components information the best technique depending on your attic type. After you have actually evaluated the attic room and performed any kind of restorative work, emphasis initially on air and wetness control.

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On the various other hand, spray foam offers air securing and a preliminary layer of high quality insulation that can be covered approximately the wanted RSI (R) level. If the attic retrofit is being completed combined with interior remodellings, the easiest strategy is to mount a brand-new, single air and vapour obstacle on the bottom of the ceiling joists.