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It is normally recommended to remove existing roof shingles when mounting brand-new ones. Certain areas in the attic can position significant fire and health and wellness threats. Before air securing and shielding an attic room, guarantee you or your specialist address the adhering to health and safety and security problems. Inspect the chimney and bordering framing for indications of charring, soot deposits, collapsing stonework or mortar, or proof that the chimney cellular lining is wearing away.


Have a chimney expert repair work, seal and insulate it at the very same time. Generally a void exists where a stonework chimney passes through the attic room. To air seal this area, initially set up sheet metal flashing to link this gap and afterwards secure all the joints with a non-combustible sealant (ensure the item is ranked for this application).


An air and vapour obstacle covers the floor of the attic room space and is secured to the joists with acoustical sealer. Factory-built metal smokeshafts must be maintained from calling 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 room between the smokeshaft and insulation.

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The top of the radiation shield must additionally be a minimum of 75 mm (3 in.) more than the level of existing or new insulation to be added. To stop insulation from dropping behind the guard, affix a clamp-type tornado collar without sealer at the top of the radiation shield, as received Figure 5-4.


A radiation barrier produces a 75 millimetre or 3-inch air space around the chimney and extends 75 millimetres or 3 inches above the attic insulation, preserving the range from flammable products. The top of the obstacle is a storm collar clamped, not secured, to the smokeshaft. Over the ceiling, the air and vapour barrier is wrapped around the drywall to contact the firestop sealer.


A collar-like ceiling trim plate is attached below the firestop. Work securely around electric circuitry (turn off the power). Speak with an electrical contractor if questionable electrical wiring or corroded electrical links exist. Common indoor recessed lights are hard to air seal successfully and can end up being a fire risk if covered with insulation.

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This likewise offers the opportunity to much better seal and protect the existing dental caries. If you discover a significant quantity of animal droppings and vermin in the attic, do not disrupt them due to the fact that they can harbour easily airborne moulds, parasite eggs and germs that can create extreme illness.


Seal the following areas: Around the plumbing stack and any kind of various other pipelines. For plastic plumbing stacks that move up and down because of thermal growth, utilize an adaptable gasket or a polyethylene sleeve sealed to a plywood collar (see Figure 5-6). Around cables or ceiling light fixtures that permeate the attic flooring and dividing and outside wall surface leading plates (see Figure 5-7 and Figure 5-8).




Around the smokeshaft. Structure codes call for that air areas between chimneys and flooring or ceiling settings up with which they pass be sealed with a non-combustible fire stop (see Number 5-3 and Figure 5-4). Along the edge of common wall surfaces. There is usually a void between the party wall surface (such as the common wall between devices in duplexes, triplexes and row homes) and the edge of the attic flooring.

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


After air sealing, attic room ventilation is your second line of support versus the water vapour that might have located its way into the attic. It guarantees a chillier, well-vented attic room space less prone to the formation of ice dams at the eaves.




You may have to locate roofing or soffit vents from outdoors if they are not plainly noticeable from inside the attic. Houses with actually peaked roof coverings and accessible attic rooms are the most convenient to air vent by utilizing the ratio of 1 to 300. This proportion describes unblocked vent location to the protected ceiling location.


Do not use electrical exhaust fans for attic ventilation as these can attract a lot more air than can be supplied via the soffit vents. This will really pull residence air right into the attic, causing higher warmth loss and dampness build-up. They are also vulnerable to failure, sound production and raised power use.

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The following Parts detail the best strategy depending on your attic room type. After you have actually examined the attic room and lugged out any remedial work, emphasis initially on air and moisture control.


On the other hand, spray foam provides air sealing and a preliminary layer of premium quality insulation that can be topped up to the preferred RSI (R) level (Spray foam insulation). If the attic retrofit is being completed together with indoor improvements, the most convenient strategy is to install a new, single air and vapour barrier on the underside of the ceiling joists


Around the chimney. Structure codes need that air rooms between smokeshafts and flooring or ceiling settings up with which they pass be secured with a non-combustible fire stop (see Number 5-3 and Figure 5-4). Along the side of common wall surfaces. There is typically a void 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 room floor.


A hefty polyethylene sheet which is caulked with acoustical sealer and stapled to the ceiling encases see here now the electrical box. An electric cord leads away from the electrical box and down with an opening into an interior wall. Openings around electric wires are loaded with caulking or foam sealant, and caulking seals voids along the top of the indoor wall surfaces.

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Attic ventilation serves a number of functions. It minimizes summer warmth build-up, lengthening the life of roof covering and lowers a/c unit tons. After air sealing, attic ventilation is your second line of protection versus the water vapour that might have located its method into the attic. It ensures a colder, well-vented attic room much less susceptible to the formation of ice dams at the eaves.


You may 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 available attics are the easiest to air vent by utilizing the ratio of 1 to 300. This proportion refers to unobstructed air vent area to the shielded ceiling location.


Also, do not use electric exhaust followers for attic air flow as these can draw extra air than can be supplied with the soffit vents. This will actually pull house air right into the attic, causing greater warmth loss and moisture buildup. They are likewise prone to failing, noise production and enhanced energy usage.


The adhering to Components information the finest method depending on your attic kind. After you have checked the attic room and brought out any type of restorative work, emphasis initially on air and dampness control.

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On the various other hand, spray foam provides air securing and a preliminary layer of premium quality insulation that can be covered up to the wanted RSI (R) level. If the attic room retrofit is being completed together with interior renovations, the simplest technique is to mount a new, solitary air and vapour barrier on the bottom of the ceiling joists.