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It is normally recommended to get rid of existing shingles when setting up brand-new ones. Specific areas in the attic room can posture major fire and carcinogen. Before air sealing and protecting an attic room, ensure you or your service provider address the following health and security problems. Examine the smokeshaft and bordering framing for indicators of charring, residue down payments, collapsing stonework or mortar, or evidence that the smokeshaft cellular lining is deteriorating.


Have a chimney professional repair service, seal and insulate it at the very same time. Frequently a gap exists where a stonework chimney passes via the attic. To air seal this location, first mount sheet metal blinking to bridge this void and then secure all the joints with a non-combustible sealant (make sure the product is rated for this application).


An air and vapour obstacle covers the flooring of the attic room space and is sealed to the joists with acoustical sealer. Factory-built steel smokeshafts must be kept from speaking to insulation by a minimum 75 mm (3 in.) unless or else specified by maker or local authorities. Set up a non-flammable radiation guard that maintains a 75-mm (3-in.) air area in between the chimney and insulation.

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The top of the radiation guard need to also be a minimum of 75 mm (3 in.) greater than the level of existing or new insulation to be added. To protect against insulation from falling back the shield, connect a clamp-type tornado collar without sealer at the top of the radiation shield, as received Figure 5-4.


A radiation obstacle develops a 75 millimetre or 3-inch air room around the chimney and extends 75 millimetres or 3 inches above the attic room insulation, maintaining the distance from flammable materials. The top of the obstacle is a tornado collar clamped, not sealed, to the chimney. Above the ceiling, the air and vapour obstacle is covered around the drywall to speak to the firestop sealant.


A collar-like ceiling trim plate is connected below the firestop. Work safely around electrical circuitry (transform off the power). Talk to an electric service provider if suspicious circuitry or rusty electrical connections exist. Conventional interior recessed lights are challenging to air seal efficiently and can end up being a fire risk if covered with insulation.

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This likewise uses the possibility to better seal and insulate the existing tooth cavity. If you discover a substantial quantity of pet droppings and vermin in the attic, do not disturb them since they can harbour quickly air-borne moulds, bloodsucker eggs and microorganisms that can create severe illness.


Seal the following areas: Around the plumbing stack and any type of other pipes. For plastic plumbing stacks that move up and down because of thermal growth, utilize a versatile gasket or a polyethylene sleeve secured to a plywood collar (see Number 5-6). Around cables or ceiling light fixtures that permeate the attic floor and partition and exterior wall top plates (see Figure 5-7 and Figure 5-8).

Around the chimney. Building codes call for that air rooms in between smokeshafts and flooring or ceiling assemblies with which they pass be sealed with a non-combustible fire stop (see Figure 5-3 and Number 5-4). Along the side of shared walls. There is usually a gap between the celebration wall (such as the shared wall in between units in duplexes, triplexes and row houses) 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 electrical box. An electric wire leads away from the electrical box and down with an opening into an indoor wall. Openings around electrical cables are full of caulking or foam sealer, and caulking seals gaps along the top of the indoor wall surfaces.


After air securing, attic room air flow is your 2nd try here line of protection against the water vapour that may have discovered its method right into the attic room. It makes certain a colder, well-vented attic area less susceptible to the development of ice dams at the eaves.




You might need to find roofing or soffit vents from outside if they are not clearly visible from inside the attic room. Residences with peaked roofing systems and easily accessible attics are the easiest to air vent by making use of the proportion of 1 to 300. This proportion describes unblocked vent area to the insulated ceiling location.


Do not make use of electrical exhaust fans for attic air flow as these can attract much more air than can be supplied via the soffit vents. This will really pull house air right into the attic, leading to higher warm loss and moisture accumulation. They are also prone to failure, sound manufacturing and raised power use.

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The adhering to Parts detail the finest approach depending on your attic type. After you have actually evaluated the attic and brought out any kind of remedial work, focus initially on air and dampness control.


On the other hand, spray foam provides air securing and a first layer of top quality insulation that can be topped as much as the preferred RSI (R) degree (Air conditioning repair). If the attic room retrofit is being completed along with indoor renovations, the easiest technique is to mount a brand-new, single air and vapour barrier on the bottom of the ceiling joists

Around the chimney. Building ordinance call for that air areas between smokeshafts and floor or ceiling settings up where they pass be sealed with a non-combustible fire stop (see Number 5-3 and Figure 5-4). Along the side of shared wall surfaces. There is frequently a gap between the celebration wall (such as the shared wall surface between devices 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 encloses the electrical box. An electric wire diverts from the electrical box and down through an opening right into an interior wall surface. Holes around electric wires are full of caulking or foam sealer, and caulking seals voids along the top of the interior walls.

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After air securing, attic ventilation is your 2nd line of protection versus the water vapour that may have found its means right into the attic room. It guarantees a colder, well-vented attic room much less susceptible to the formation of ice dams at the eaves.


You might need to find roofing system or soffit vents from outside if they are not plainly noticeable from inside the attic. Houses with actually peaked roofings and easily accessible attics are the easiest to air vent by utilizing the ratio of 1 to 300. This proportion describes unobstructed air vent location to the insulated ceiling location.


Likewise, do not use electrical exhaust fans for attic room ventilation as these can draw extra air than can be supplied through the soffit vents. This will really draw residence air into the attic room, resulting in better warm loss and moisture build-up. They are also susceptible to failure, sound manufacturing and enhanced energy usage.

The complying with Parts detail the best approach depending on your attic room kind. After you have examined the attic and lugged out any kind of restorative work, focus initially on air and dampness control.

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On the other hand, spray foam uses air sealing and a first layer of top quality insulation that can be topped as much as the desired RSI (R) degree. If the attic retrofit is being finished along with indoor restorations, the easiest technique is to install a brand-new, single air and vapour barrier on the bottom of the ceiling joists.