Re: re felting a shed roof

Discussion in 'Misc DIY' started by BigWallop, Nov 22, 2008.

  1. BigWallop

    BigWallop Guest

    Start at the eaves and work up to the top. Apply felt adhesive, or liquid
    felt, liberally all over the roof. Apply the first row of felt over the
    eaves. Leave a few inches over the edges to form tucks so the rain drips
    away from the walls of the shed. Leave a couple of inches on overlaps so
    the water runs onto and not under the previous row of felt.

    Use large head felt (roofing) nails every 6 or so inches along all the
    edges, and try to use liquid felt or felt adhesive under and on top of all
    joints. Apply liquid felt with an old paint brush. All mineral crumbs can
    be collected to cover the nail heads and camouflage them.

    The top ridge felt covering should be stuck with felt adhesive and then
    nailed to make it stronger and last longer.
    BigWallop, Nov 22, 2008
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  2. BigWallop

    Tim Lamb Guest

    All above and....

    Use mineralised felt and fit thin battens, 18" apart, up and down the
    slope to stop wind lift.

    By tucks, I think BW meant to say double the felt back under itself to
    form a strong edge/drip.

    Tim Lamb, Nov 22, 2008
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  3. BigWallop

    Cash Guest

    "strong edge/drip" - its called a welted drip and if you are using the green
    mineralised felt, it is sensible to lightly heat this with a blow torch on
    the actual 'bend' to avoid cracking during the 'turn-over' operation.
    Cash, Nov 22, 2008
  4. BigWallop

    robgraham Guest

    I'm not accusing those who have replied of not having done a re-
    felting job in winter, but having done a similar repair situation some
    years ago and had to work all day and well into dark (7pm on a cold
    winter's night !!), I would strongly recommend that you consider
    avoiding using felt. You are going to be faced with trying to apply
    an adhesive that is very temperature sensitive in terms of its
    capacity to flow and hence be painted on, and will need to be warmed
    considerably to be useable.

    You will find that if you go to any of the Sheds you can get sheets of
    Onduline. The accumulative price is not going to be that much
    different from using felt properly, and the effort to install it is
    minimal which is critical at this time of year. If you haven't done
    felting before, avoid it under these circumstances and go with the
    corrugated material - not much different in price and so much easier
    to put on. I've just done a 5m x 3m roof with it and it took a short

    robgraham, Nov 22, 2008
  5. BigWallop


    If the gloop goes stiff, it can be thinned with a lttle paraffin.
    Ultimately it can just be wiped on solid if necessary, just press down
    hard to stick.

    Go for a modern felt, trad felts stiffen right up in cold weather.

    , Nov 22, 2008
  6. BigWallop

    BigWallop Guest

    A Welted Edge. That's it. I was going to call it a Welp. :) Isn't it
    luck a red face only lasts for a second. lol
    BigWallop, Nov 22, 2008
  7. BigWallop

    BigWallop Guest

    Try bending the felt cold to see how much radius it will allow. Leave that
    much over and bend it round to get a drip form. In the warmer weather you
    can tidy it up a bit more. Even in these cold conditions, the felt should
    bend through quite a tight radius without cracking.
    BigWallop, Nov 23, 2008
  8. BigWallop

    Tim Lamb Guest

    I have a B&D hot air paint stripper which has little effect on paint but
    works wonders on bending plastics and unfreezing pipes.

    Try bending an offcut and see how it goes.

    Wait till she is out and borrow the hair drier:)

    Tim Lamb, Nov 23, 2008
  9. BigWallop

    Tim Lamb Guest

    Very much depends on the felt you are using. As others have said, some
    are designed to have the contact side *melted* by contact with a large
    direct flame from a torch.

    Simply bending should not need much more than warm. You will have to
    experiment. Working off the ground, applying heat to a narrow but long
    strip really needs a hand portable heat source. I have not tried but a
    plumbers soldering torch with a diffuse flame, kept moving, might do.

    Tim Lamb, Nov 25, 2008
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