nh26302 Posted March 12, 2023 Share Posted March 12, 2023 Hi, Have posted this on the SIP forum but thought I would also post here.... I have a SIP outbuilding with a vaulted ceiling and need to attach 2inch battens to the roof for fixing plasterboard (to skim). The roof panels have 11mm OSB and need advise on how best to secure the battens to the ceiling? I have seen suggestions of simply using 70mm wood screws and also using the black phosphate drywall screws together with PVA glue to ensure a greater pullout resistance? Thanks in advance Link to comment Share on other sites More sharing options...
LA3222 Posted March 12, 2023 Share Posted March 12, 2023 Just need screws long enough to protrude 20mm beyond the face OSB sheet - that was the tech advice given to me by a screw company who had tested the pullout strength etc. I was pointed to them by the tech bods at Kingspan Timber Solutions Tech dept. For 50mm battens I'd go with 90mm. Do you need 50mm battens for the ceiling? I used 47mm for walls and 22mm for the ceiling purely because I had no requirement for a deeper service cavity on the ceiling. Link to comment Share on other sites More sharing options...
nod Posted March 12, 2023 Share Posted March 12, 2023 (edited) Don’t use batons Ise 100 mil x 25 Fix with 65 mil ring nails No need for glue Use 35 mil timber drywall screws You can hang an elephant off those Edited March 12, 2023 by nod Link to comment Share on other sites More sharing options...
nh26302 Posted March 12, 2023 Author Share Posted March 12, 2023 Wanted to have downlights on the ceiling, hence the use of battens to create the void Link to comment Share on other sites More sharing options...
LA3222 Posted March 12, 2023 Share Posted March 12, 2023 2 hours ago, nod said: Don’t use batons Ise 100 mil x 25 Fix with 65 mil ring nails No need for glue Use 35 mil timber drywall screws You can hang an elephant off those I agree with the 100x25mm - got to be screws for SIP though. 1 Link to comment Share on other sites More sharing options...
nh26302 Posted March 12, 2023 Author Share Posted March 12, 2023 I will be using the ultra slim LED downlights which have a depth of ~30mm - wouldn't the 100x25mm be cutting it to fine to be able to install them? Link to comment Share on other sites More sharing options...
nh26302 Posted March 12, 2023 Author Share Posted March 12, 2023 I will be using the ultra slim LED downlights which have a depth of ~30mm - wouldn't the 100x25mm be cutting it to fine to be able to install them? To clarify, I was thinking of using 50mm x 50mm battens Link to comment Share on other sites More sharing options...
LA3222 Posted March 12, 2023 Share Posted March 12, 2023 I cant see a drama, plenty of screws to secure it to the SIP and job is a fish. Link to comment Share on other sites More sharing options...
SuperJohnG Posted March 12, 2023 Share Posted March 12, 2023 Another with a SIP build here as @LA3222 said use screws. You dont need the glue. Link to comment Share on other sites More sharing options...
nh26302 Posted March 13, 2023 Author Share Posted March 13, 2023 Thank you all Link to comment Share on other sites More sharing options...
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