joists

I installed a loft hatch today, and in the process found that the joists on either side are at different heights, an entire inch apart! I'm looking to board out the loft in the new year, with 2x4's across the existing joists and insulate and all that good stuff, but now I've to work out how to...

Hi all I have a garage with flat roof neglected for years hence the joists are rotting away, I need to replace them but only problem is these joists are 5.3 metres long! I've not seen any timber this long anywhere, longest is 4.2 metres so I was wondering is it possible to join two 3 metre...

Hi, I'm refurbing the galley kitchen in our Victorian terrace (solid brick walls, no cavity). Three of ceiling joists (which are the floor joists of the bathroom above) need replacing completely (they can't be sistered) but are pocketed into the brick walls on both sides. One of those walls is...

Basically I wonder if anybody could give me any tips on making my loft space into a nice clean usable area. First of all I am not putting in any stairs I am still going to be using the existing loft ladder the space up in the loft is very large indeed I was hoping it would be okay to keep the...

Hi, going nuts here a bit. I'm trying to do the dims for my garden office and am doing 5x2 roof joists with firring strips on top for the pitch. I am doing 400mm centres, but this does not seem to work to get the end of the OSB (1220x2440) to end on half the joist. I've read somewhere you do...

Hi, I would like to lay a new floor covering in the first floor bedroom in our victorian terrace. The problem is that the 5x2 floor joists (actual size 120mm x 60mm) are at 800mm centres with no noggins and span roughly 2.4m. Ideally I would make the structure better in order to accommodate...

Hi, I would like to lay a new floor covering in the first floor bedroom in our victorian terrace. The problem is that the floor joists (120mm x 60mm) are at 800mm centres with no noggins, spanning roughly 3.4m. Ideally I would make the structure better in order to accommodate a standard 18mm...

Hi all. My 1st floor bedroom floor is wonky. Drops unto 40mm from edge to centre - looks like bowed joists. I'm loathe to sister each joists with new timber and someone suggested just shimming the joists - add a strip of wood to the top of each joist with varying thickness to create a level...

Hi guys I'm in need of some advice please, I'm trying to do some calcs for a loft what I need to know is how to work out the self weight of purlins and individual joists, (looked every where) I would also like to know when adding a point load from a trimmer carrying the floor do I have to also...

Hi All I have lifted the floor in our renovation to find the builders have not made a particularly nice job of attaching the joists to the RSJ as you can see in the photograph. Am I correct in thinking the proper way would be with a piece of word infilling the web of the RSJ and joist hangers...

Hi all, I'm putting 10 x 2 joists in for a flat roof. The span is about 3m from wall plate into steel and then the same out of the other side of the steel to the fascia. The steel section is 254 tall so I've gone for 10x 2 to give a flat roof and a flush ceiling. Can anyone advise on the...

Hi So, I have to run a 44mm waste pipe through my joists in my bathroom - not ideal but such is life. My thoughts are to hole and sister joist each in turn. My question is how to do this? Reading around, i see my options as follows: 1) Buy 2x7 and glue + strap each side of the joist for a...

Hi, I know that the first thing that comes to mind is not to do it – if can be avoided. However I don’t think it can… I’m planning to do as per attached drawing, in a photo the connection to the main waste stack is slightly different as I realized it will need a hole in the joist outside...

Hi all, I'm currently self building a single storey extension and I'm wondering wether I need a timber wall plate or not. Can I just run the timbers over the blockwork and brick and use restraint straps as pictured? My timbers are running the steels to give a flat ceiling and in years to come...

Hello all, I'm renovating my property completely and want to make it as airtight as possible so I can install a MVHR. The house is two storey detached and has cavity wall in the ground floor but single solid wall on the first floor. My questions are around the first floor joists, which they...

So we had central heating installed and were later told that the plumbers had cut through the joists when they shouldn't have- the floorboards were essentially resting on the pipes etc.... So then somebody came along and drilled holes through the joists under the cuts to feed the pipes through...

I have concerns about all the holes that have been drilled into the joists in our new extension. My understanding from documents like this (North Herts Council Building Control Technical Guidance Note No. 22 Notching Of Joists) is that holes should be: Drilled into center line. Drilled between...

There is a lot of conflicting methods on building a deck so i’m looking for your idea of best practices. I’m laying a deck that is approx 24m2 over 3 levels, each level is 40cm, 30cm and 15cm above ground respectively. Is the deck best going on 100mm x 100mm decking posts/stakes at 1.2m...

Floor by John Davison posted 10 Jun 2016 at 9:10 PMFloor by John Davison posted 10 Jun 2016 at 9:09 PMFloor joists by John Davison posted 10 Jun 2016 at 9:09 PMHi, we recently purchased a 1800s stone built house. The walls are approx 18 inches thick rubble filled stone. In the main bedroom we...

Hi everyone, After recently purchasing our property, I've found some patches woodworm holes in the main roof joists. They are mainly at the upper half of two joists and from what I can tell they don't seem to be active. I've attached the photos below and would appreciate any advice given. Thanks