woodworm one side - damp solid kitchen floor the other

[scrambler]

span is 2200 mm

i was going to use the same joists as the rest of ground floor - look to be 100mm by 50mm ( from memory )

was planning to just extend or place overlap adjacent to existing joists..


the brick work looks in good condition - so maybe bolting the hangars straight onto wall - rather than bolting another 4 by 2 on the wall?

can I use a shim to get the level right? if the hangars are too low?


I am planning to put some air bricks in - I have a mortar rake. - this may involve lowering a concrete path on the outside. ( too high any way - up to DPC on the outside.)

 

[vinn]

Is 2000mm the single clear span? In my book, 100mm x 50mm is never a heavy enough section for any kind of joist go for the next available size up.

Stay with the plan, dont give yourself problems - bolt the plate to the wall - the plate should be approx. 6" x 2"
place the bolts in the joist bays between the joists.
Why not post pics of the outside at ground level?

 

[scrambler]

yeh 2200 mm is the span - go I need to put a wall in the middle to stop sagging? this will be a heavily trafficed area - heavy cooker - cupboards etc above.

theres actually a bit of a wall there already - footing of an old pantry - I could follow that line - giving span of about 1000 mm - cutting it in half.

am I to bolt the 6x 2 plate to the wall with expanding bolts?

cheers Vinn

 

[scrambler]

searching for photo now - if it doesnt exist -will have to take one... but basically the exterior ground is about the top of the bottom course of blue engineered bricks in previous photos

 

[scrambler]

havent got a close up.

 

[vinn]

2m is nothing as spans go but build a mid-way supporting wall if you want.

Expanding bolts.

 

[scrambler]

just remeasured and the existing joists are 100 mm by 50 mm they are spaced unevenly 40 to 45 cm apart

are u suggesting the thicker joists to prevent sagging?

actually seems I have dug down at least 20 cm below the level of the existing joists ( if they were extended over the new void )

I suppose a supporting knee wall would stop the sagging? trying to work out the easiest way to do it?

slice another course off the wall in the pic , add damp proof then a bit of wood to raise joists to right height? across to the plate I bolted on the wall? wood just sits on plate is ok? maybe some bracket to stop it twisting.. guess once floorboard is on will be stable?

I am wondering if I should just use pine floorboards? try and replace any rotten ones and sandthem up / fill the cracks? no need laminate floor then?