This is a follow-up post that will cover my construction phase, after I initially posted my design and some questions in the "Studio Design" section and received great help in with sme quesiotns and issues I had. The post can be seen here: http://johnlsayers.com/phpBB2/search.ph ... =egosearch
A short summary: The room is made of concrete blockwork, with a loft area upstairs.
Below are some renders of what I intend to do. The old garage door will remain (conservation area!!
), but will be blocked up on the inside using concrete blocks. Notice the ventilation via a fan in the loft area, and 2 silencers for the external leaf in the loft, and two silencers for the inner leaf being put partly inside the internal stud wall (which will be 4x2 studs at 600mm centres), obviously not touching the outer leaf. The inner leaf will be a layer of 18mm OSB3 and a layer of 15mm plasterboard, with Green Glue in between. The reason the grilles for the silencers are at mid-height is because I dont want to lose any more space - so both the internal silencers are connected with the external leaf silencers via insulated flexiduct running between joists in the ceiling cavity. I would welcome any comments or pointers if I have made any serious mistakes, since I am yet to start on the internal leaf or HVAC.
The necessary work on the external leaf has already begun. I have ripped out the old loft floor (nasty chipboard) and old joists (hopelessly under-specced and warped), and after consulting a structural engineer, replaced these with new C24 6x2 joists and two layers of 18mm OSB3 - taking care to seal all the joints and gaps with acoustic sealant. The old garage used to have an internal loft ladder through a hole in the loft-floor into the loft, however I have changed access to the loft via a new entrance via a hatch in the gable wall. I have also blocked up one of the windows with concrete blocks, and tried to seal any cracks and holes in the outer leaf with either cement or sealant. Lastly, I have given the inside a few layers of masonry paint. Some photos below. If there are any comments or mistakes so far, please let me know.
My next phase is to take out the remaining window, put in a new frame and temporarily glaze it with a clear acryclic sheet. I am gathering quotes for a 21mm piece of laminated glass to go into this new frame - although it does not nearly match the density of the 100mm concrete blockwork, it is about as thick as I want to go and can afford. I will also apply a resin based damp proof membrane (DPM) to the cement floor. When this is done, I will post more photos.
I would really appreciate any comments or suggestions from the forum, and will keep posting my progress as I go along in case some of the bits I end up doing can be of help to others
Francois
its expensive!), and may reduce this to something closer to 16mm to save some money. Stuart, will this be ok, given my internal leaf window will be 12.8mm laminated glass?