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How much does it cost to spray foam a tiny house?

Spray Foam Insulation Cost Calculator National Average $2,624 Typical Range $1,342 - $3,908 Low End - High End $650 - $7,000

homeadvisor.com - How Much Does Spray Foam Insulation Cost to Install in 2022?

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Attic

The cost to insulate an attic with spray foam is between $1,500 and $3,500. Contact an attic insulation contractor to see if you can add insulation to the ceiling and the walls for extra protection.

Basement Walls

Installing expanding foam in the walls of a 1,000-square-foot basement costs between $2,400 and $8,400, including labor. Spray foam basement insulation helps prevent mold.

Crawl Spaces

Adding polyurethane foam insulation under a house or in a crawl space costs about $1,000 to $5,900, including labor. Areas larger than 2 feet by 10 feet will cost more.

Roof

The average cost to insulate a roof with spray foam is about $2,400 to $8,000, including labor. Closed-cell insulation works best on most roofs. Ask a roofing pro to see which material is ideal for your space.

Rim Joists

Spray foam is an ideal choice to insulate rim joists and seal cracks, and it typically costs between $1,200 to $2,000, including labor and materials. Rim joists, also called band joists, secure the ends of floor joists. The price of this project varies depending on how many rim joists are in your home, although it will cost much less than large projects like insulating an attic or basement.

Garages

Garage insulation costs between $930 and $2,100, including installation. If you insulate your garage walls, it’s important to insulate your garage door as well, including weatherstripping the bottom edge of the garage door and installing polystyrene panels on the backside of the garage door.

Pole Barns or Other Detached Outbuilding

The cost to spray foam a pole barn is $6,000 to $18,000 for a new building and $8,000 to $20,000 for an existing building. The price is higher than other application locations due to the increased square footage and material costs. Spray foam insulation on a metal building can improve R-value.

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What size Armoured cable do I need for a shed?

For a 40amp supply a 6mm or if a longer run 10mm SWA cable would be required. If the incoming house supply is PME (TNCS) then a 2core SWA cable should be used with a local earth electrode driven into the ground at the shed end making the shed submain a TT supply.

mybuilder.com - What armour cable to use for shed / workshop with at least 8 double ...

To be able to calculate the cable diameter required, the distance from the house to the shed is needed. However as a rough guide it would be sensible to have a 40amp BSEN60898 type B MCB at the supply (house end). This would allow for a 32amp ring circuit for the sockets and a separate 6amp lighting circuit. For a 40amp supply a 6mm or if a longer run 10mm SWA cable would be required. If the incoming house supply is PME (TNCS) then a 2core SWA cable should be used with a local earth electrode driven into the ground at the shed end making the shed submain a TT supply. If the incoming house supply is TNS, then the earth can be exported and a 3core SWA would be preferable with the third core used as the CPC and cross bonded to the outer steel wire armouring. It must be stressed that this is Part P notifiable work. So if you are doing it as DIY you must pre-register your intent and pay your local authority Part P notification fees upfront. (Typically around £200 - £300). Best advice is for safety and to save money hire a professional electrician to install it, as installing and testing the work requires specialist equipment. (e.g. EFLI and RCD tester etc)