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  • FIRST POST
    • nad1611
    • By nad1611 11th Jan 20, 2:45 PM
    • 672Posts
    • 284Thanks
    nad1611
    Cost of Conversion of Flat Roof to Pitched Roof
    • #1
    • 11th Jan 20, 2:45 PM
    Cost of Conversion of Flat Roof to Pitched Roof 11th Jan 20 at 2:45 PM
    Hi All. Just wanted an idea of cost for changing a flat garage/porch roof to a pitched roof. The flat roof is in a poor state with rotten wood boards under it at present. The garage will be being converted to a habitable room.

    A ball park figure would be great. It's about 15m2 and we'd use red tiles to fit in with current house tiles. There won't be anything complicated about it just a straighforward swap without a window or the like.
    Many Thanks
Page 1
    • Doozergirl
    • By Doozergirl 11th Jan 20, 7:17 PM
    • 28,039 Posts
    • 74,463 Thanks
    Doozergirl
    • #2
    • 11th Jan 20, 7:17 PM
    • #2
    • 11th Jan 20, 7:17 PM
    About 5k or less. Ish.
    Everything that is supposed to be in heaven is already here on earth.
    • theGrinch
    • By theGrinch 12th Jan 20, 3:29 PM
    • 3,003 Posts
    • 704 Thanks
    theGrinch
    • #3
    • 12th Jan 20, 3:29 PM
    • #3
    • 12th Jan 20, 3:29 PM
    Depends on part of the country but definitely more than 5k for a proper job.

    Timbers, insulation - roof, floor and walls, roofing, plastering, waste etc etc. Thats 7k on its own plus labour so more like 14k
    "enough is a feast"...old Buddist proverb
    • nad1611
    • By nad1611 14th Jan 20, 6:54 PM
    • 672 Posts
    • 284 Thanks
    nad1611
    • #4
    • 14th Jan 20, 6:54 PM
    • #4
    • 14th Jan 20, 6:54 PM
    Thanks. Yes more than 5k I'd say for definite. We have the added advantage of family members potentially doing the labour so that will be less than normal.


    Thanks that helps.
    • Doozergirl
    • By Doozergirl 14th Jan 20, 11:11 PM
    • 28,039 Posts
    • 74,463 Thanks
    Doozergirl
    • #5
    • 14th Jan 20, 11:11 PM
    • #5
    • 14th Jan 20, 11:11 PM
    14k for 15 square metres of roof?

    There's no wonder we're busy as a company that puts pitched roofs on extensions of that size all the time if we're undercharging by that much.

    Why would one need to do any plastering when replacing the roof? Roofers don't do plastering for a start, but even when people replace roofs they leave the ceilings underneath intact.

    Are you asking about the roof or the entire conversion, because your headline question clearly says roof! And there's nothing in the OP to suggest it's the whole project you were asking for costs on.
    Everything that is supposed to be in heaven is already here on earth.
    • traineepensioner
    • By traineepensioner 17th Jan 20, 10:05 PM
    • 309 Posts
    • 163 Thanks
    traineepensioner
    • #6
    • 17th Jan 20, 10:05 PM
    • #6
    • 17th Jan 20, 10:05 PM
    About 5k or less. Ish.
    Originally posted by Doozergirl
    I'd definitely hire you.

    From o/p " flat roof is in a poor state with rotten wood boards under it"
    "The garage will be being converted to a habitable room"
    15 m2...

    Assuming simple non hip roof....

    That's removing the flat roof, including covering and decking.
    Supply & install timber to correct pitch.
    Supply & fit Insulation to meet building control requirements.
    Supply & fit roofing tiles and associated membranes & battens
    Supply & fit soffits, fascia's & gutterings.
    Supply & fit brickwork or Plastic stuff to fill roof gables.

    I wish I could diy it for less than 5000.
    No longer trainee
    Retired in 2012 (54)
    State pension due 2024 (66)
    • ashe
    • By ashe 17th Jan 20, 10:13 PM
    • 726 Posts
    • 506 Thanks
    ashe
    • #7
    • 17th Jan 20, 10:13 PM
    • #7
    • 17th Jan 20, 10:13 PM
    People seem to be quoting for the conversion to a habitable room when the question was around conversion of flat to pitch roof, the rest of the info seemed additional information for context. Last section of the post says "There won't be anything complicated about it just a straighforward swap without a window or the like."
    • traineepensioner
    • By traineepensioner 17th Jan 20, 10:20 PM
    • 309 Posts
    • 163 Thanks
    traineepensioner
    • #8
    • 17th Jan 20, 10:20 PM
    • #8
    • 17th Jan 20, 10:20 PM
    People seem to be quoting for the conversion to a habitable room when the question was around conversion of flat to pitch roof, the rest of the info seemed additional information for context. Last section of the post says "There won't be anything complicated about it just a straighforward swap without a window or the like."
    Originally posted by ashe
    "Hi All. Just wanted an idea of cost for changing a flat garage/porch roof to a pitched roof. The flat roof is in a poor state with rotten wood boards under it at present. The garage will be being converted to a habitable room."

    Perhaps the O/P could confirm?
    No longer trainee
    Retired in 2012 (54)
    State pension due 2024 (66)
    • silvercar
    • By silvercar 17th Jan 20, 11:29 PM
    • 39,800 Posts
    • 164,136 Thanks
    silvercar
    • #9
    • 17th Jan 20, 11:29 PM
    • #9
    • 17th Jan 20, 11:29 PM
    You need to check the walls, could be single brick. Also, will the foundations to a garage (if any) support a pitched roof.
    • Doozergirl
    • By Doozergirl 18th Jan 20, 12:04 AM
    • 28,039 Posts
    • 74,463 Thanks
    Doozergirl
    I give up.

    Say one thing and it's ridiculously expensive because x did theirs for y and posts us photos of the utter bodge that theirs is.

    Say another thing and suddenly people know exactly how much it costs to DIY a roof that they openly admit to not DIYing.

    Do people actually know what 15 square metres looks like? Not a lot is the answer. Some people think that they could build a house for the same price per metre as some expect to just cover a monopitch roof.
    Last edited by Doozergirl; 18-01-2020 at 12:25 AM.
    Everything that is supposed to be in heaven is already here on earth.
    • silvercar
    • By silvercar 18th Jan 20, 10:09 AM
    • 39,800 Posts
    • 164,136 Thanks
    silvercar
    Do people actually know what 15 square metres looks like?
    I think people take garage size as the clue.

    But 15 square meters would be the area covering a rectangle 3m x 5m. Or in old money about 10 foot by 16 foot, give or take a few inches.

    Anyone thinking each side is going to be 15m would be covering a much larger area!
    Last edited by silvercar; 18-01-2020 at 10:12 AM.
    • onomatopoeia99
    • By onomatopoeia99 18th Jan 20, 10:53 PM
    • 6,046 Posts
    • 14,043 Thanks
    onomatopoeia99
    "Hi All. Just wanted an idea of cost for changing a flat garage/porch roof to a pitched roof. The flat roof is in a poor state with rotten wood boards under it at present. The garage will be being converted to a habitable room."

    Perhaps the O/P could confirm?
    Originally posted by traineepensioner
    You have highlighted a question about wanting an idea of the cost of changing the roof and a statement about the garage being converted to habitable. There is nothing to confirm, the opening post is clear, only one piece of information is being asked for, the cost of changing to a pitched roof.

    What people are doing talking about plastering in this context is unfathomable.
    INTP, nerd, libertarian and scifi geek. Home is where my books are.

    5.2kWp system, SE facing, >1% shading, installed March 2019.
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