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Evening all, Getting ready for the roof deck and I am looking at using Visqueen self adhesive membrane for the VCL ontop of either a 18mm Ply or OSB deck (yet to decide which). Have any of you experience of using it? Would you recommend a primer is used on the deck? Could it be used as a temp...

Maybe naively I'm not bothered about thermal performance, as the joists are effectively an internal partition (i.e. it's within the thermal envelope of the house). But, I do want to maximise on acoustic insulation between the ground/first floor.......

Evening all, Making some progress on our extension and I'm trying to save some money (while not compromising) on insulation etc. I've found a plentiful supply of HP Rockwool Partial Fill insulation which is reasonably priced, but I want to know if it can be used between first floor joists for...

Noted, I've run them in at full lengths (5400) for the time being so I can figure out the detail later with a string line and a skill saw

Cheers @^woody^ The span (from timber trimmer in the web of the steel with heavy duty joist hangers to the inner leaf of blocks) is 4.7m the joist then runs out another 100mm (cavity) and is then notched to clear the outer leaf of brickwork. The joist then projects past the outer leaf by a...

Understood @Notch7, but then what about first floor joists which are regularly built into thermalite blocks? Surely similar if not more point loading in those instances? Could be a call into BC in the morning for clarification......

Thanks @Bonni but that link concerns pitched roofs, This is for a flat roof.

Evening all, Thank you to those who have given me some pointers to date, much appreciated. Just started framing the flat roof starting with a roof light, triple trimmers etc. Unfortunately I was away while the blockwork was run in and didn't get a chance to agree a wall plate so I am going to...

Noted, That's an interesting setup, I see the threaded bar linking the two joists, is there a timber packer between them to maintain the gap? Is that a double to support a stud wall above?

Quick follow up if I may, Installation of steels and packing the webs has gone well as has installing most of the joist hangers, I opted for the heavy duty (Simpson SAE range) but one of the smaller steels may require a different approach, As you can see from the attached the profile of the...

Tis the season to believe, I have a DeWalt DCN694, I bought into the XR and FlexVolt range a few years ago, there's deals to be had on naked DeWalt tools from FFX and BuyAParcel on eBay when they run a 20% off promo. Back in the day my fall back job was carpentry with my dad, also done...

I have one, just didn't realise they also sell shearadized nails for them!

I'll check my measurements later today :D

We are going for full height doors hence the steel beam height (were only only doing this once ) As for the notching, in my head, if I run a wall plate either side of that steel beam I would then have to cut the underside of the joists to allow the joist to sit on the wall plate but keep the...

I appreciate the pointers, ceiling height is 2400mm. The joists will run out over the wall to create a 400mm overhang which will be stepped as per the detail, The cross section shows the interface with the steel beam for the bifolds but not either side of the steel......

Pre marked baton is a good shout, Not sure I understand your thoughts on the wall plate though....

Sound, thanks @noseall Chances are I've a triple trimmer within the 400 to the left (for a roof light) but I guess same principles would apply I'll just fix the nogging to the inner trimmer. Would you use a wall plate on a flat roof (approx 5m span) either side of the bifold goal posts? I'm...

(P.S. those wooden wedges were a temp solution to hold the steel beam steady, a more permanent solution is in place now )

Evening all, The main steels are in (phew) all went well. I'm preparing for the roof joists now which raises another question..... The centre column which required bolting to the adjacent beams meant the timber in the web had to be cut back for access, unfortunately this section knackers me for...

Evening all, I've a fair bit of first fix work to do on 9x2's etc. so I've bought a DCN692, I'm already into the Dewalt ecosystem so I took advantage of a deal I seen. Could anyone who uses this gun recommend come collated nails to use, I'm looking at 90mm ones but I see some recommend buying...