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It is generally advised to remove existing roof shingles when setting up new ones. Particular locations in the attic can present serious fire and health and wellness hazards. Before air sealing and shielding an attic room, ensure you or your specialist address the following health and wellness issues. Inspect the smokeshaft and surrounding framing for indicators of charring, residue deposits, crumbling stonework or mortar, or proof that the smokeshaft cellular lining is degrading.


Have a smokeshaft professional fixing, seal and shield it at the very same time. Commonly a void exists where a stonework smokeshaft travels through the attic. To air seal this location, initially mount sheet steel blinking to connect this gap and after that seal all the joints with a non-combustible sealer (make certain the item is rated for this application).


An air and vapour obstacle covers the flooring of the attic room 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 brand-new insulation to be added. To stop insulation from falling behind the guard, connect a clamp-type tornado collar without sealant on top of the radiation shield, as displayed in Number 5-4.


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


A collar-like ceiling trim plate is affixed listed below the firestop. Common interior recessed lights are challenging to air seal successfully and can come to be a fire hazard if covered with insulation.

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This additionally provides the possibility to better seal and shield the existing cavity. If you discover a substantial amount of animal droppings and vermin in the attic, do not disturb them since they can harbour conveniently airborne moulds, bloodsucker eggs and microorganisms that can cause serious ailment.


Seal the following locations: Around the plumbing pile and any kind of various other pipes. For plastic plumbing stacks that go up and down due to thermal growth, utilize a flexible gasket or a polyethylene sleeve sealed to a plywood collar (see Figure 5-6). Around cables or ceiling light components that pass through the attic room flooring and partition and exterior wall top plates (see Number 5-7 and Number 5-8).




Building codes require that air areas between smokeshafts and floor or ceiling settings up via which they pass be secured with a non-combustible fire stop (see Figure 5-3 and Figure 5-4). There is usually a void in between the event wall surface (such as the common wall between units in duplexes, triplexes and row houses) 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 wire diverts from the electrical box and down via a hole right into an interior wall surface. Holes around electric wires are full of caulking or foam sealant, and caulking seals spaces along the top of the interior walls.


After air sealing, attic room air flow is your second line of protection versus the water vapour that might have found its method right into the attic room. It makes certain a chillier, well-vented attic room space less susceptible to the formation of ice dams at the eaves.




You may need to find roof or soffit vents from outside if they are not clearly visible from inside the attic. Houses with actually peaked roofs and available attics are the easiest to vent by utilizing the proportion of 1 to 300. This proportion describes unhampered air vent area to the protected ceiling area.


Also, do not use electric exhaust fans for attic room air flow as these can attract a lot more air than can be provided with the soffit vents. This will actually pull residence air right into the attic, resulting in greater warmth loss and dampness buildup. They are additionally vulnerable to failing, noise production and raised power usage.

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The area of vents is as crucial as their number and kind. Usually, a blend of types and places will function best. The following Components detail the ideal approach depending upon your attic kind. After you have evaluated the attic and executed any kind of remedial job, focus first on air and dampness control.


On the various other hand, spray foam offers air securing and a first layer of excellent quality insulation that can be topped as much as the wanted RSI (R) level (Duct cleaning). If the attic room retrofit is being completed together with interior restorations, the most convenient approach is to set up a new, single air and vapour barrier on the bottom of the ceiling joists


Around the smokeshaft. Building ordinance need that air spaces in between chimneys and floor or ceiling assemblies whereby they pass be sealed with a non-combustible fire stop (see Number 5-3 and Number 5-4). Along the edge of common wall surfaces. There is commonly a space between the party wall surface (such as the shared wall surface between units in duplexes, triplexes and row residences) and the side of the attic flooring.


A hefty polyethylene sheet which is caulked with acoustical sealant and stapled to the ceiling frames the electrical box. An electric wire diverts from the electric box and down with an opening into an indoor wall surface. Holes around electric wires are full of caulking or foam sealant, and caulking seals voids along the top of the interior walls.

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Attic air flow offers a variety of objectives. It decreases summer warm accumulation, lengthening the life of roof covering and reduces air conditioning system loads. After air sealing, attic ventilation is your second line of support against the water vapour that may have discovered its method right into the attic room. It makes certain a cooler, well-vented attic space less prone to the formation of ice dams at the eaves.


You may need to situate roofing or soffit vents from outside if they are not clearly visible from inside the attic. Residences with actually peaked roofs and available attics are the easiest to vent by utilizing the ratio of 1 to 300. This ratio describes unhampered air vent area to the protected ceiling area.


Likewise, do not use electrical exhaust followers for attic ventilation as these can draw much more air than can be supplied via the soffit vents. This will really pull house air right into the attic, resulting in better heat loss and dampness accumulation. They are also susceptible to failure, noise manufacturing and enhanced energy usage.


The area of vents is as important as their number and type. Usually, a combination of types best site and locations will work best. The complying with Parts information the best technique relying on your attic room type. After you have checked the attic room and brought out any kind of therapeutic job, focus first on air and dampness control.

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On the other hand, spray foam uses air sealing and an initial layer of top quality insulation that can be covered as much as the preferred RSI (R) level. If the attic retrofit is being finished in combination with interior renovations, the easiest method is to mount a brand-new, single air and vapour obstacle on the bottom of the ceiling joists.