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It is typically recommended to remove existing roof shingles when mounting new ones. Certain areas in the attic can present severe fire and health hazards. Prior to air securing and shielding an attic, guarantee you or your service provider address the following health and safety and security problems. Examine the chimney and surrounding mounting for signs of charring, residue deposits, crumbling stonework or mortar, or evidence that the chimney cellular lining is wearing away.


Have a smokeshaft specialist repair work, seal and protect it at the exact same time. Frequently a gap exists where a masonry smokeshaft goes through the attic room. To air seal this area, initially set up sheet metal blinking to connect this gap and afterwards seal all the joints with a non-combustible sealant (make certain the item is ranked for this application).


An air and vapour obstacle covers the flooring of the attic room space and is secured to the joists with acoustical sealer. Factory-built metal smokeshafts should be maintained from contacting insulation by a minimum 75 mm (3 in.) unless or else defined by producer or local authorities. Mount a non-flammable radiation shield that maintains a 75-mm (3-in.) air space between the smokeshaft 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 degree of existing or new insulation to be included. To stop insulation from dropping behind the guard, affix a clamp-type storm collar without sealer on top of the radiation guard, as received Number 5-4.


A radiation barrier develops a 75 millimetre or 3-inch air area around the smokeshaft and expands 75 millimetres or 3 inches above the attic insulation, keeping the range from combustible products. The top of the obstacle is a storm collar secured, not secured, to the chimney. Over the ceiling, the air and vapour obstacle is wrapped around the drywall to contact the firestop sealant.


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

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This likewise supplies the opportunity to far better seal and protect the existing dental caries. If you discover a considerable amount of animal droppings and vermin in the attic, do not disturb them due to the fact that they can harbour conveniently airborne moulds, parasite eggs and bacteria that can cause serious ailment.


Seal the following areas: Around the plumbing stack and any type of various other pipelines. For plastic plumbing stacks that go up and down because of thermal growth, utilize an adaptable gasket or a polyethylene sleeve secured to a plywood collar (see Number 5-6). Around cables or ceiling lighting fixtures that permeate the attic room floor and dividers and outside wall surface leading plates (see Number 5-7 and Figure 5-8).




Building codes call for that air spaces in between smokeshafts and floor or ceiling assemblies via which they pass be secured with a non-combustible fire quit (see Number 5-3 and Number 5-4). There is commonly a space between the party wall (such as the shared wall between systems in duplexes, triplexes and row homes) and the side of the attic flooring.

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A hefty polyethylene sheet which is caulked with acoustical sealer and stapled to the ceiling encloses the electric box. An electric cable diverts from the electrical box and down through an opening into an indoor why not find out more wall. Openings around electrical cords are full of caulking or foam sealant, and caulking seals spaces along the top of the indoor walls.


After air sealing, attic air flow is your 2nd line of protection against the water vapour that might have located its means right into the attic. It guarantees a cooler, well-vented attic room area much less vulnerable to the formation of ice dams at the eaves.




You might have to locate roofing or soffit vents from outside if they are not clearly visible from inside the attic room. Residences with actually peaked roof coverings and easily accessible attic rooms are the simplest to vent by using the ratio of 1 to 300. This proportion describes unblocked vent area to the insulated ceiling location.


Additionally, do not make use of electric exhaust fans for attic air flow as these can attract more air than can be supplied via the soffit vents. This will in fact pull residence air into the attic, leading to better warm loss and dampness build-up. They are likewise susceptible to failing, noise production and increased power usage.

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The adhering to Parts detail the finest strategy depending on your attic type. After you have checked the attic room and carried out any type of remedial work, emphasis first on air and wetness control.


On the various other hand, spray foam provides air securing and an initial layer of high top quality insulation that can be covered up to the desired RSI (R) level (Home energy efficiency). If the attic room retrofit is being finished along with interior remodellings, the simplest method is to set up a brand-new, solitary air and vapour obstacle on the bottom of the ceiling joists


Around the chimney. Building ordinance require that air spaces in between smokeshafts and floor or ceiling settings up where they pass be sealed with a non-combustible fire stop (see Figure 5-3 and Number 5-4). Along the edge of common wall surfaces. There is typically a void in between the event wall surface (such as the common wall between systems in duplexes, triplexes and row homes) and the edge of the attic room floor.


A heavy polyethylene sheet which is caulked with acoustical sealer and stapled to the ceiling encloses the electrical box. An electrical wire leads away from the electrical box and down through an opening into an indoor wall surface. Openings around electrical cables are loaded with caulking or foam sealant, and caulking seals gaps along the top of the interior wall surfaces.

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


You may have to situate roof or soffit vents from outside if they are not plainly noticeable from inside the attic room. Homes with peaked roofs and accessible attics are the most convenient to vent by utilizing the ratio of 1 to 300. This proportion describes unhampered air vent location to the insulated ceiling area.


Likewise, do not use electric exhaust fans for attic ventilation as these can attract more air than can be supplied through the soffit vents. This will really draw home air right into the attic, leading to better warmth loss and dampness buildup. They are also vulnerable to failing, sound manufacturing and raised power use.


The area of vents is as vital as their number and type. Often, a blend of kinds and locations will work best. The complying with Components information the finest strategy depending on your attic room kind. After you have actually checked the attic room and accomplished any type of restorative work, focus first on air and wetness control.

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On the other hand, spray foam provides air sealing and an initial layer of top quality insulation that can be covered as much as the preferred RSI (R) level. If the attic retrofit is being finished along with indoor improvements, the most convenient technique is to set up a brand-new, single air and vapour barrier on the bottom of the ceiling joists.