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It is commonly advised to get rid of existing roof shingles when setting up new ones. Certain areas in the attic room can present severe fire and carcinogen. Before air sealing and shielding an attic room, guarantee you or your contractor address the following health and wellness issues. Examine the smokeshaft and surrounding framing for indicators of charring, soot deposits, collapsing masonry or mortar, or evidence that the chimney cellular lining is wearing away.


Have a smokeshaft specialist fixing, seal and protect it at the very same time. Frequently a gap exists where a stonework chimney passes via the attic. To air seal this location, first set up sheet metal flashing to link this space and afterwards seal all the joints with a non-combustible sealer (guarantee the item is ranked for this application).


An air and vapour obstacle covers the flooring of the attic room and is sealed to the joists with acoustical sealant. Factory-built steel chimneys must be avoided calling insulation by a minimal 75 mm (3 in.) unless otherwise defined by manufacturer or regional authorities. Mount a non-flammable radiation shield that preserves a 75-mm (3-in.) air room between the chimney and insulation.

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The top of the radiation shield must additionally be a minimum of 75 mm (3 in.) greater than the degree of existing or brand-new insulation to be included. To prevent insulation from falling back the shield, attach a clamp-type storm collar without sealant at the top of the radiation shield, as displayed in Figure 5-4.


A radiation obstacle develops a 75 millimetre or 3-inch air room around the smokeshaft and expands 75 millimetres or 3 inches over the attic room insulation, keeping the range from flammable products. The top of the obstacle is a storm collar clamped, not sealed, to the chimney. Over the ceiling, the air and vapour obstacle is twisted around the drywall to speak to the firestop sealer.


A collar-like ceiling trim plate is affixed listed below the firestop. Job safely around electrical wiring (shut off the power). Seek advice from an electric service provider if suspicious electrical wiring or corroded electrical connections are existing. Standard indoor recessed lights are hard to air seal efficiently and can become a fire risk if covered with insulation.

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As an alternative to typical recessed or pot lights consider light-emitting diode (LED) flush or level mount fixtures for better energy performance. This also uses the opportunity to much better seal and protect the existing cavity. Guarantee that component installment instructions are complied with. If you locate a significant amount of animal droppings and vermin in the attic room, do not interrupt them because they can harbour easily air-borne moulds, bloodsucker eggs and microorganisms that can cause severe disease.


Seal the complying with locations: Around the plumbing stack and any type of various other pipes. For plastic plumbing stacks that go up and down due to thermal development, use a versatile gasket or a polyethylene sleeve secured to a plywood collar (see Number 5-6). Around cords or ceiling lighting fixtures that pass through the attic room flooring and dividing and outside wall surface top plates (see Figure 5-7 and Figure 5-8).




Building codes call for that air spaces between smokeshafts and flooring or ceiling assemblies via which they pass be secured with a non-combustible fire stop (see Number 5-3 and Number 5-4). There is typically a gap in between the celebration wall (such as the common wall surface between devices in duplexes, triplexes and row homes) and the edge of the attic room flooring.

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


Attic air flow serves a number of objectives. It decreases summer season heat accumulation, lengthening the life of roofing and minimizes a/c lots. After air sealing, attic air flow is your 2nd line of defence against the water vapour that may have discovered its means into the attic - HVAC maintenance. It makes certain a colder, well-vented attic area much less susceptible to the development of ice dams at the eaves.




You might have to locate roof or soffit vents from outside if they are not plainly noticeable from inside the attic room. Houses with actually peaked roof coverings and obtainable attic rooms are the simplest to vent by utilizing the proportion of 1 to 300. This proportion describes unblocked vent area to the shielded ceiling location.


Likewise, do not use electrical exhaust fans for attic air flow as these can draw much more air than can be provided with the soffit vents. This will actually draw home air into the attic room, leading to better warm loss and moisture buildup. They are likewise prone to failing, noise manufacturing and boosted energy usage.

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The area of vents is as essential as their number and kind. Frequently, a combination of types and places will certainly function best. The complying with Components information the most effective strategy depending on your attic kind. After you have actually examined the attic room and accomplished any type of therapeutic work, emphasis first on air and dampness control.


On the various other hand, spray foam supplies air securing and an initial layer of excellent quality insulation that can be topped as much as the preferred RSI (R) degree (Radiant barriers). If the attic room retrofit is being finished together with indoor renovations, the easiest my response method is to install a new, single air and vapour barrier on the underside of the ceiling joists


Structure codes call for that air areas in between chimneys and floor or ceiling settings up through which they pass be sealed with a non-combustible fire quit (see Number 5-3 and Figure 5-4). There is typically a void between the party wall (such as the shared wall surface in between units in duplexes, triplexes and row homes) and the side of the attic room flooring.


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

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After air securing, attic room ventilation is your second line of defence versus the water vapour that might have discovered its way right into the attic room. It makes sure a chillier, well-vented attic room much less susceptible to the development of ice dams at the eaves.


You may have to locate roof covering or soffit vents from outdoors if they are not clearly visible from inside the attic room. Homes with peaked roofs and accessible attic rooms are the simplest to vent by utilizing the proportion of 1 to 300. This proportion refers to unhampered vent area to the shielded ceiling area.


Also, do not make use of electric exhaust followers for attic air flow as these can attract more air than can be provided through the soffit vents. This will in fact pull residence air into the attic room, resulting in higher heat loss and wetness accumulation. They are additionally prone to failing, noise production and increased energy usage.


The location of vents is as essential as their number and type. Typically, a blend of kinds and places will work best. The complying with Parts detail the best approach depending on your attic kind. After you have actually checked the attic and accomplished any type of remedial work, emphasis initially on air and wetness control.

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On the other hand, spray foam supplies air sealing and an initial layer of premium quality insulation that can be topped approximately the preferred RSI (R) level. If the attic room retrofit is being completed combined with interior improvements, the simplest approach is to set up a new, single air and vapour obstacle on the underside of the ceiling joists.