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It is typically recommended to get rid of existing shingles when mounting brand-new ones. Certain locations in the attic room can position significant fire and wellness hazards. Before air securing and insulating an attic room, ensure you or your service provider address the complying with wellness and safety and security worries. Check the chimney and surrounding mounting for signs of charring, residue down payments, collapsing masonry or mortar, or evidence that the chimney cellular lining is deteriorating.


Have a chimney specialist repair work, seal and shield it at the very same time. Commonly a gap exists where a masonry smokeshaft travels through the attic. To air seal this area, first install sheet metal flashing to connect this space and after that seal all the joints with a non-combustible sealer (make certain the product is rated for this application).


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

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The top of the radiation shield ought to also be a minimum of 75 mm (3 in.) higher than the level of existing or new insulation to be added. To avoid insulation from falling back the guard, connect a clamp-type storm collar without sealer on top of the radiation guard, as shown in Number 5-4.


A radiation barrier develops a 75 millimetre or 3-inch air room around the chimney and expands 75 millimetres or 3 inches above the attic room insulation, preserving the distance from flammable materials. The top of the obstacle is a storm collar clamped, not sealed, to the chimney. Over the ceiling, the air and vapour barrier is covered around the drywall to get in touch with the firestop sealant.


A collar-like ceiling trim plate is affixed below the firestop. Work securely around electrical circuitry (shut off the power). Seek advice from an electric contractor if questionable electrical wiring or rusty electrical links are present. Common interior recessed lights are tough to air seal effectively and can end up being a fire hazard if covered with insulation.

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This likewise supplies the chance to far better seal and insulate the existing dental caries. If you discover a substantial amount of pet droppings and vermin in the attic room, do not disturb them due to the fact that they can harbour quickly air-borne moulds, parasite eggs and germs that can create severe ailment.


Seal the following areas: Around the pipes pile and any various other pipelines. For plastic plumbing stacks that go up and down due to thermal development, make use of a flexible gasket or a polyethylene sleeve sealed to a plywood collar (see Number 5-6). Around cables or ceiling lights that pass through the attic flooring and dividing and outside wall top plates (see Figure 5-7 and Number 5-8).




Around the smokeshaft. Building regulations need that air rooms in between smokeshafts and flooring or ceiling assemblies via which they pass be sealed with a non-combustible fire stop (see Figure 5-3 and Figure 5-4). Along the edge of common walls. There is usually a void in between the party wall surface (such as the shared wall between systems in duplexes, triplexes and row residences) and the edge of the attic floor.

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A heavy polyethylene sheet which is caulked with acoustical sealer and stapled to the ceiling encloses the electrical box. An electric cord diverts from the electric box and down through a hole into an interior wall surface. Holes around electrical cables are full of caulking or foam sealant, and caulking seals gaps along the top of the indoor walls.


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




You might need to situate roof or soffit vents from outside if they are not clearly visible from inside the attic. Homes with peaked roofings and obtainable attic rooms are the most convenient to air vent by utilizing the ratio of 1 to 300. This proportion describes unhampered air vent location to the shielded ceiling location.


Do not use electric exhaust fans for attic room air flow as these can draw more air than can be supplied via the soffit vents. This will actually pull home air right into the attic, resulting in higher warm loss and wetness accumulation. They are also prone to failing, sound production and enhanced energy usage.

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The complying with Parts detail the best approach depending on your attic kind. After you have examined the attic room and brought out any restorative job, focus initially on air and moisture control.


On the other hand, spray foam uses air sealing and a preliminary layer of premium quality insulation that can be topped as much as the wanted RSI (R) degree (Spray foam insulation). If the attic room retrofit is being finished along with interior remodellings, the most convenient approach is to set up a brand-new, solitary air and vapour barrier on the bottom of the ceiling joists


Building codes need that air areas in between smokeshafts and flooring or ceiling assemblies through which they pass be secured with a non-combustible fire stop (see Number 5-3 and Figure 5-4). There is frequently a void between the party wall (such as the shared wall surface between devices in duplexes, triplexes and row homes) and the side of the attic flooring.


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

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After air sealing, attic ventilation is your second line of defence against the water vapour that may have found its means right into the attic room. It makes certain a cooler, well-vented attic room space 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. Houses with peaked roofings and easily accessible attic rooms are the most convenient to air vent by making use of the proportion of 1 to 300. This proportion refers to unobstructed vent area to the shielded ceiling area.


Also, do not use electrical exhaust followers for attic ventilation as these can draw more air than can be supplied via the soffit vents. This will in fact draw house air into the attic room, causing better warmth loss and wetness build-up. They are also vulnerable to failure, noise production and raised power use.


The complying with Components information the finest method depending on your attic room type. After you have inspected the attic room and carried out any remedial work, this post focus initially on air and wetness control.

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On the other hand, spray foam provides air sealing and an initial layer of premium quality insulation that can be covered as much as the desired RSI (R) degree. If the attic room retrofit is being completed along with indoor improvements, the most convenient technique is to set up a new, single air and vapour obstacle on the underside of the ceiling joists.