TIMBER
JOIST REPAIRSummary:
Repair joists and other floor timbers - using our Joist End Repair Plates, Joist
Splicing Plates or Timber-Resin Splice Kits.
Click
to see the Joist Repair Plates, check prices and buy.
TIMBER
FLOOR DAMAGEThere
are three main types of damage, but they are all caused by one problem - DAMP.
Timber will start to decay at above 18% moisture content (in average softwood
species, like an ordinary Pine), so elimination of dampness is our main concern. 1.
Wet rot - does not spread beyond the area of wetness: it causes localised damage
to timber 2. Dry rot -
can spread well beyond the area of wetness and cause serious damage to timber 3.
Insect attack - mostly in damp areas, can spread beyond, but mostly slow acting Click
to see timber decay treatments for wet rot, dry rot and woodworm attack.
REPAIRING
JOIST ENDSJoist
ends become damp because they rest inside or close to the support walls and easily
absorb water from damp soil, humid air or water leaks. Any repair or treatment
must include attention to the sub floor Air Bricks. The
easiest way to repair joist ends is to fit Joist End Repair Plates. These come
as a pair of L shaped, metal plates complete with screws and instructions. They
have the advantage that joists are extended back into or onto the original bearing,
whereas repairs with bolted-on pieces of wood mean that you need a new bearing
area, or a more complex solution using three pieces of wood.
Click
to see the Joist Repair Plates, check prices and buy.
TREATING
JOIST ENDSThe
end grain 'cut' and the support area should be thoroughly treated with Boron Ultra
Gel and a piece of damp proof material, like DPC plastic, placed underneath, to
prevent damp from being transferred. Use pre-treated timber if possible. Clean
out the Air Bricks and fit additional to allow about one brick per 2.25 metres
of outside wall. This will only work effectively if the external ground level
is well below the air bricks - built-up soil, tarmac or pathways can easily prevent
air flow. Click
to see joist end treatments for wet rot, dry rot and woodworm attack.
REPAIRING
CARRIER BEAMSThese
are usually larger section timbers than the joists and may not be suitable for
the Joist Repair Plate system. If larger than 10 inch x 2 inch (250mm x 50mm)
then you will need to use the Timber-Resin Splice system instead. This provides
a new piece of timber, with bars pre-bonded into one end, ready for you to fit
using the resins provided in the kit. Click
for Timber Beam Repair Systems
TREATING
CARRIER BEAMS AND WALL PLATES Because
these tend to be thicker than joists (more than 2 inch, 50mm thick) they need
additional treatment. As well as being thoroughly treated with Boron Ultra Gel
they need injection with Boron Ultra Paste, via 10mm diameter holes. If permanently
damp, like some embedded wall plates, such timbers may justify the insertion of
Boron Rods, as well as Paste, both placed in the same holes to work together.
These Boron based materials dissolve inside the wood and create a reservoir of
Borate, which kills and prevents rots and insect attack. If
you need any further help with any type of floor repair or timber treatment, Property
Repair Systems expert staff will be pleased to give you completely free, no obligation
advice on 01626 331351. Click
for Boron Treatments
Repairs
| Beams |
Roof
| Timber
Mold | Dry Rot
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Property
Repair Systems
Olympus Business Park, Kingsteignton Road
Newton Abbot, Devon, TQ12 2SN T:
01626 331351
F: 01626 331143
E: help@propertyrepairsystems.co.uk
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