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It is normally advised to eliminate existing shingles when installing brand-new ones. Particular locations in the attic room can present severe fire and health and wellness risks. Prior to air sealing and shielding an attic room, ensure you or your contractor address the adhering to health and wellness worries. Check the smokeshaft and surrounding mounting for indications of charring, residue deposits, collapsing masonry or mortar, or evidence that the chimney lining is deteriorating.


Have a smokeshaft professional repair work, seal and protect it at the exact same time. Commonly a space exists where a stonework smokeshaft travels through the attic room. To air seal this area, initially set up sheet metal flashing to connect this space and afterwards seal all the joints with a non-combustible sealer (guarantee the product is ranked for this application).


An air and vapour barrier covers the floor of the attic room room and is secured to the joists with acoustical sealant.

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The top of the radiation shield must also be a minimum of 75 mm (3 in.) higher than the degree of existing or new insulation to be included. To stop insulation from falling behind the guard, attach a clamp-type storm collar without sealer at the top of the radiation shield, as displayed in Number 5-4.


A radiation obstacle creates a 75 millimetre or 3-inch air room around the chimney and expands 75 millimetres or 3 inches over the attic insulation, keeping the distance from combustible materials. The top of the obstacle is a storm collar secured, not secured, to the smokeshaft. Above the ceiling, the air and vapour obstacle is wrapped around the drywall to speak to the firestop sealer.


A collar-like ceiling trim plate is affixed listed below the firestop. Job securely around electric circuitry (shut off the power). Talk to an electrical professional if suspicious circuitry or rusty electrical connections are present. Conventional interior recessed lights are difficult to air seal successfully and can become a fire danger if covered with insulation.

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As an option to conventional recessed or pot lights take into consideration light-emitting diode (LED) flush or level install components for much better power efficiency. This also offers the chance to far better seal and insulate the existing dental caries. Make sure that fixture installation instructions are complied with. If you find a considerable quantity of animal droppings and vermin in the attic room, do not interrupt them since they can harbour conveniently airborne moulds, parasite eggs and germs that can cause serious ailment.


Seal the following areas: Around the plumbing pile and any type of other pipes. For plastic plumbing stacks that go up and down as a result of thermal development, use an adaptable gasket or a polyethylene sleeve sealed to a plywood collar (see Number 5-6). Around cables or ceiling lights that permeate the attic room floor and dividers and exterior wall leading plates (see Figure 5-7 and Number 5-8).




Building codes call for that air rooms between chimneys and floor or ceiling assemblies via which they pass be secured with a non-combustible fire stop (see Number 5-3 and Figure 5-4). There is often a void in between the event wall surface (such as the common wall between systems in duplexes, triplexes and row residences) and the edge of the attic room flooring.

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A heavy polyethylene sheet which is caulked with acoustical sealer and stapled to the ceiling encases the electrical box. An electric cable diverts from the electric box and down with an opening right into an indoor wall. Openings around electrical wires are loaded with caulking or foam sealant, and caulking seals gaps along the top of the interior walls.


Attic ventilation offers a number of functions. It lowers summer heat accumulation, extending the life of roof and minimizes air conditioner loads. After air securing, attic room ventilation is your 2nd line of defence against the water vapour that may have discovered its means into the attic - HVAC installation. It makes sure a colder, well-vented attic room space less prone to the development of ice dams at the eaves.




You may have to situate roof covering or soffit vents from outdoors if they are not clearly visible from inside the attic. Houses with actually peaked roofs and accessible attics are the easiest to vent by making use of the proportion of 1 to 300. This proportion describes unblocked vent location to the shielded ceiling area.


Also, do not use electrical exhaust fans for attic ventilation as these can draw much more air than can be provided with the soffit vents. This will really pull house air into the attic room, resulting in higher warm loss and dampness build-up. They are also vulnerable to failure, noise production and raised energy usage.

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The following Parts information the finest strategy depending on your attic type. After you have checked the attic and carried out any type of therapeutic job, emphasis initially on air and dampness control.


On the other hand, spray foam provides air sealing and a preliminary layer of top quality insulation that can be covered approximately the wanted RSI (R) level (Duct cleaning). If the attic retrofit is being completed combined with indoor improvements, the easiest method is to install a new, single air and vapour barrier on the underside of the ceiling joists


Around the chimney. Building regulations require that air rooms in between smokeshafts and floor or ceiling settings up where they pass be secured with a non-combustible fire stop (see Figure 5-3 and Number 5-4). Along the edge of common walls. There is often a review gap in between the celebration wall surface (such as the shared wall surface between units in duplexes, triplexes and row residences) and the edge of the attic flooring.


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

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Attic air flow offers a variety of objectives. It reduces summer warm accumulation, lengthening the life of roofing and minimizes air conditioning system tons. After air securing, attic room air flow is your second line of defence versus the water vapour that might have located its method right into the attic. It makes sure a colder, well-vented attic space less prone to the formation of ice dams at the eaves.


You might need to find roof or soffit vents from outside if they are not clearly noticeable from inside the attic. Homes with actually peaked roofings and easily accessible attic rooms are the easiest to vent by utilizing the ratio of 1 to 300. This ratio describes unhampered air vent area to the shielded ceiling area.


Additionally, do not make use of electrical exhaust followers for attic room ventilation as these can attract much more air than can be supplied through the soffit vents. This will actually draw house air right into the attic room, resulting in greater warm loss and wetness buildup. They are additionally prone to failing, noise manufacturing and enhanced power use.


The complying with Components detail the best strategy depending on your attic kind. After you have actually examined the attic room and lugged out any type of remedial work, focus initially on air and wetness control.

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On the various other hand, spray foam provides air securing and a first layer of top quality insulation that can be topped up to the wanted RSI (R) level. If the attic retrofit is being finished together with indoor restorations, the simplest method is to install a brand-new, single air and vapour barrier on the bottom of the ceiling joists.