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It is usually advised to eliminate existing roof shingles when installing new ones. Certain areas in the attic can present major fire and carcinogen. Prior to air sealing and shielding an attic, ensure you or your specialist address the following health and safety worries. Inspect the chimney and surrounding framing for indications of charring, residue down payments, crumbling masonry or mortar, or proof that the smokeshaft cellular lining is degrading.


Have a smokeshaft specialist repair service, seal and protect it at the same time. Generally a gap exists where a masonry chimney passes via the attic. To air seal this area, initially set up sheet metal flashing to connect this gap and after that seal all the joints with a non-combustible sealer (make certain the item is ranked for this application).


An air and vapour barrier covers the flooring of the attic space and is sealed to the joists with acoustical sealer. Factory-built metal chimneys need to be avoided getting in touch with insulation by a minimal 75 mm (3 in.) unless or else defined by manufacturer or regional authorities. Set up a non-flammable radiation guard that preserves a 75-mm (3-in.) air space in between the smokeshaft and insulation.

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The top of the radiation guard should likewise be a minimum of 75 mm (3 in.) greater than the level of existing or brand-new insulation to be included. To stop insulation from dropping behind the shield, connect a clamp-type tornado collar without sealant at the top of the radiation guard, as received Figure 5-4.


A radiation obstacle produces a 75 millimetre or 3-inch air space around the smokeshaft and prolongs 75 millimetres or 3 inches above the attic room insulation, maintaining the range from flammable materials. The top of the barrier is a storm collar clamped, not sealed, to the smokeshaft. Over the ceiling, the air and vapour barrier is covered around the drywall to call the firestop sealer.


A collar-like ceiling trim plate is connected below the firestop. Typical interior recessed lights are difficult to air seal effectively and can become a fire hazard if covered with insulation.

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This also provides the chance to much better seal and shield the existing dental caries. If you find a significant amount of animal droppings and vermin in the attic, do not disturb them due to the fact that they can harbour easily airborne moulds, parasite eggs and microorganisms that can cause severe health problem.


Seal the following areas: Around the plumbing pile and any kind of various other pipelines. For plastic pipes heaps that relocate up and down as a result of thermal expansion, use a flexible gasket or a polyethylene sleeve secured to a plywood collar (see Number 5-6). Around wires or ceiling lights that penetrate the attic room flooring and dividing and outside wall surface leading plates (see Figure 5-7 and Number 5-8).




Building codes require that air areas between smokeshafts and flooring or ceiling assemblies via which they pass be secured with a non-combustible fire stop (see Figure 5-3 and Number 5-4). There is frequently a void in between the celebration wall (such as the common wall in between systems in duplexes, triplexes and row homes) and the edge of the attic room floor.

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A hefty polyethylene sheet which is caulked with acoustical sealant and stapled to the ceiling frames the electric box. An electric cable diverts from the electric box and down through a hole into an indoor wall surface. Openings my sources around electric wires are loaded with caulking or foam sealer, and caulking seals voids along the top of the interior wall surfaces.


Attic ventilation serves a number of objectives. It lowers summer season warm build-up, prolonging the life of roof and minimizes a/c lots. After air securing, attic room ventilation is your second line of support against the water vapour that may have discovered its means right into the attic room - HVAC repair. It guarantees a cooler, well-vented attic room room much less vulnerable to the development of ice dams at the eaves.




You may need to locate roof covering or soffit vents from outside if they are not plainly noticeable from inside the attic. Homes with actually peaked roofing systems and available attic rooms are the most convenient to vent by utilizing the proportion of 1 to 300. This proportion describes unobstructed air vent area to the protected ceiling location.


Do not utilize electric exhaust fans for attic ventilation as these can attract more air than can be supplied with the soffit vents. This will really pull residence air right into the attic room, resulting in better heat loss and dampness accumulation. They are likewise susceptible to failure, sound production and boosted energy use.

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The following Components information the ideal technique depending on your attic kind. After you have examined the attic room and brought out any restorative job, focus initially on air and wetness control.


On the various other hand, spray foam provides air securing and a preliminary layer of excellent quality insulation that can be covered up to the desired RSI (R) degree (Home energy efficiency). If the attic retrofit is being finished along with interior renovations, the simplest approach is to set up a brand-new, solitary air and vapour barrier on the bottom of the ceiling joists


Structure codes require that air spaces in between smokeshafts and floor or ceiling assemblies through which they pass be secured with a non-combustible fire stop (see Figure 5-3 and Number 5-4). There is frequently a space in between the party wall surface (such as the common wall surface between units in duplexes, triplexes and row homes) and the edge of the attic room flooring.


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

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After air securing, attic room air flow is your 2nd line of support against the water vapour that might have found its way right into the attic room. It guarantees a chillier, well-vented attic space much less vulnerable to the development of ice dams at the eaves.


You might need to find roofing or soffit vents from outdoors if they are not plainly noticeable from inside the attic room. Homes with peaked roofing systems and obtainable attic rooms are the simplest to vent by utilizing the proportion of 1 to 300. This ratio refers to unobstructed vent area to the insulated ceiling area.


Also, do not use electric exhaust followers for attic room air flow as these can draw much more air than can be supplied with the soffit vents. This will in fact pull residence air right into the attic room, leading to greater warmth loss and wetness accumulation. They are also vulnerable to failure, noise manufacturing and raised energy usage.


The following Parts information the ideal approach depending on your attic kind. After you have actually checked the attic room and lugged out any kind of therapeutic job, emphasis first on air and wetness control.

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On the other hand, spray foam supplies air securing and an initial layer of high quality insulation that can be covered as much as the preferred RSI (R) degree. If the attic retrofit is being finished together with interior improvements, the simplest approach is to mount a new, solitary air and vapour barrier on the bottom of the ceiling joists.