Timber Joist Repair

Repair Joist Ends, Splice on new wood, fill notches in joists

Property Repair Systems - Joist Repair Site Home Page - 01626 331351 - talk to real people about rot in joists

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Repair wood joists - Joist Repair Plates or Joist Splice Plates

Joist Repair Kits - ready made Kits, including the timber machined by us to original size, if necessary.


Article about joist repair - click here


To repair joist ends or replace sections call: 01626 331351

Joist End Repair Plates are supplied as pairs of galvanized steel plates, pre-drilled, to be fixed with Coach Screws (included). The plates rest in or on the wall and allow for the rotted end to be cut off.

Maximum joist width allowable is 3 inches, 75mm, Domestic Floor Loadings only.

BM6 Plates - allow for up to 6 inches, 150mm, to be cut off - joist size 4 inches, 100mm deep up to 7 inches, 175mm deep maximum

BM9 Plates - allow for up to 9 inches, 225mm, to be cut off - joist size 4 inches, 100mm deep up to 7 inches, 175mm deep maximum

Only for joists 6 inches, 150mm, deep or larger to a maximum thickness of 3 inches, 75mm Domestic Floor Loadings only.

BM17 Plates - allow for up to 17 inches, 432mm, to be cut off - joist size 6 inches, 150mm deep up to 9 inches, 225mm deep maximum.

Joist End Repair Plates - fixed with coach screws

Joist Splice Plate Kits are supplied as pairs of plates made from anodised aluminium treadplate, un-drilled, to be fixed with self drilling and tapping screws (included). The plates allow you to joint domestic joists at any point along their length.

Maximum Joist Width allowable is 3 inches, 75mm, for Domestic Floor Loadings only.

JSP Small Kit - for joists from 4 inches up to 6 inches, 100mm - 150mm, in depth

JSP Medium Kit - for joists from 6 inches to 8 inches, 150mm - 200mm, in depth

JSP Large Kit - for joists from 8 inches up to 10 inches, 200mm to 250mm, in depth

Fixed with self piercing screws with built in washers

Alternative joist repair method - Timber-Resin Splice Kit

Method - How to repair Joist Ends with a Timber-Resin Splice Kit

  1. Prop the joists to ground
  2. Cut off the damaged part (any length)
  3. Make a slot in the top face, or a pair of slots in the side face to our Design Sketch (provided)
  4. Dry fit the new piece of wood which already has bars fitted (this is the Timber-Resin Splice itself) - if it fits properly seal the butting face with the quick setting filler provided
  5. Complete the repair by either pouring resin into the top slot or injecting into the side slots
  6. Timber-Resin Splice to joist, resin being poured into a top slot

    Pouring resin into a Top Slotted  Timber Resin Splice

    Larger joists, in manufacture, showing the connector bars

    Large Timber Resin Slices

    Request Quotation Form - to request a price and Design for your repair

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Other Property Repair Systems Sites:

www.boron.org.uk - how to use Boron based insecticides/fungicides to treat timber rots and insect attack

www.dampness-info.co.uk - how to treat penetrating dampness in walls and plaster

www.deck-treatment.co.uk - how to treat patio decks and yacht decks

www.dryrot.biz - how to kill Dry Rot in buildings

www.drywallandfloor.co.uk - membranes for lining damp walls, floors, basements and cellars

www.epoxy-info.co.uk - epoxy resins for repairing wood, concrete, brick and stone

www.fire-door-paint.co.uk - upgrade doors to 30 minutes fire resistance

www.propertyrepairsystems.co.uk - our Home Site

www.steel-fire-paint.co.uk - treat steel with Intumescent Paint to provide fire protection

www.timber.org.uk - systems of repair, with step by step methods

www.timber-repair.co.uk - how to repair timber beams

www.woodworm-info.co.uk - how to kill and prevent woodworm and death watch beetle

www.woodworm-expert-advice-forum.org.uk - all your questions and our answers about woodworm treatment DIY

Site written by: David Moore

David Moore, B.A. (Hons.), C.T.I.S., C.R.D.S. Technical Author