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It is usually suggested to get rid of existing roof shingles when setting up new ones. Certain areas in the attic can pose serious fire and health hazards. Prior to air sealing and insulating an attic, guarantee you or your specialist address the following health and wellness problems. Examine the smokeshaft and surrounding mounting for indications of charring, soot down payments, collapsing masonry or mortar, or proof that the chimney lining is wearing away.


Have a chimney expert repair work, seal and protect it at the same time. Generally a space exists where a stonework chimney travels through the attic room. To air seal this area, initially set up sheet steel flashing to bridge this space and after that 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 area and is secured to the joists with acoustical sealer. Factory-built metal smokeshafts must be avoided calling insulation by a minimum 75 mm (3 in.) unless otherwise specified by supplier or regional authorities. Mount a non-flammable radiation shield that keeps a 75-mm (3-in.) air space between the smokeshaft and insulation.

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The top of the radiation shield ought to also be a minimum of 75 mm (3 in.) greater than the level of existing or new insulation to be added. To stop insulation from falling back the shield, connect a clamp-type storm collar without sealant at the top of the radiation shield, as revealed in Number 5-4.


A radiation obstacle develops a 75 millimetre or 3-inch air room around the smokeshaft and extends 75 millimetres or 3 inches above the attic insulation, preserving the range from flammable products. The top of the obstacle is a tornado collar secured, not secured, to the smokeshaft. Above the ceiling, the air and vapour obstacle is twisted around the drywall to speak to the firestop sealer.


A collar-like ceiling trim plate is affixed listed below the firestop. Conventional interior recessed lights are difficult to air seal effectively and can come to be a fire danger if covered with insulation.

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As a choice to standard recessed or pot lights think about light-emitting diode (LED) flush or flat place fixtures for far better energy effectiveness. This additionally uses the opportunity to much better seal and shield the existing cavity. Make sure that fixture installation directions are adhered to. If you find a considerable quantity of animal droppings and vermin in the attic room, do not interrupt them because they can harbour quickly air-borne moulds, bloodsucker eggs and germs that can trigger extreme illness.


Seal the complying with locations: Around the pipes pile and any kind of various other pipelines. For plastic plumbing heaps that relocate up and down because of thermal development, make use of an adaptable gasket or a polyethylene sleeve secured to a plywood collar (see Number 5-6). Around cords or ceiling lighting fixtures that pass through the attic room floor and partition and exterior wall surface leading plates (see Number 5-7 and Number 5-8).




Around the smokeshaft. Structure codes call for that air rooms in between chimneys and flooring or ceiling settings up where they pass be sealed with a non-combustible fire stop (see Figure 5-3 and Figure 5-4). Along the edge of common wall surfaces. There is often a gap between the party wall surface (such as the common wall between units in duplexes, triplexes and row houses) and the side of the attic floor.

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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 via a hole right into an indoor wall. Holes around electric cables are full of caulking or foam sealer, and caulking seals voids along the top of the indoor walls.


After air securing, attic room air flow is your second line of support against the water vapour that might have located its means into the attic. It makes sure a cooler, well-vented attic room room much less prone to the formation of ice dams at the eaves.




You may need to situate roof covering or soffit vents from outdoors if they are not clearly visible from inside the attic room. Houses with peaked roofs and accessible attic rooms are the most convenient to air vent by utilizing the proportion of 1 to 300. This ratio refers to unhampered air vent location to the protected ceiling area.


Do not use electric exhaust followers for attic air flow as these can attract much more air than can be provided with the soffit vents. This will really draw home air into the attic, causing higher heat loss and dampness build-up. They are also prone to failing, sound manufacturing and raised energy use.

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The complying with Parts information the ideal method depending on your attic type. After you have actually examined the attic room and lugged out any kind of remedial job, focus initially on air and dampness control.


On the various other hand, spray foam offers air sealing and a preliminary layer of excellent quality insulation that can be covered approximately the wanted RSI (R) degree (HVAC repair). If the attic room retrofit is being completed together with interior remodellings, 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 areas in between smokeshafts 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 side of shared wall surfaces. There is commonly a void between the event wall (such as the common wall between devices in duplexes, triplexes and row homes) and the side of the attic floor.


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

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Attic ventilation serves a variety of objectives. It decreases summertime warm accumulation, extending the life of roof and minimizes a/c unit tons. After air securing, attic ventilation is your second line of defence against the water vapour that might have located its means right into the attic room. It makes sure a chillier, well-vented attic area less prone to the formation of ice dams at the eaves.


You might have to locate roof or soffit vents from outdoors if they are not plainly noticeable from inside the attic. Residences with actually peaked roofings and obtainable attics are the easiest to vent by utilizing the proportion of 1 to 300. This ratio describes unobstructed vent location great site to the insulated ceiling location.


Do not use electric exhaust fans for attic air flow as these can draw more air than can be provided through the soffit vents. This will really pull home air right into the attic, causing higher warmth loss and wetness build-up. They are additionally susceptible to failure, noise manufacturing and enhanced energy usage.


The area of vents is as vital as their number and type. Typically, a blend of types and places will work best. The complying with Parts detail the best approach depending on your attic type. After you have actually evaluated the attic room and executed any type of remedial work, emphasis initially on air and wetness control.

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On the various other hand, spray foam uses air sealing and a first layer of high top quality insulation that can be topped as much as the preferred RSI (R) degree. If the attic retrofit is being finished combined with indoor restorations, the simplest approach is to set up a brand-new, single air and vapour obstacle on the underside of the ceiling joists.