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Joanna Malone Door Threshold January 14th, 2020 - 11:48:14
3. SECURITY Most folding doors will feature a high security locking system but many still use face fixed or flag hinges that can pose a possible security issue and allow the hinges to be removed from the outside when the door is closed. Some upvc bifold doors may also use an exposed gearing system that is accessible from the outside of the door when the door is closed which can also pose a possible security threat. You can eliminate these potential security problems by ensuring you choose a folding door that has fully concealed gearing and hinge fixings.
I believe installation direct to masonry is the height of challenge for an entry door where skills and patience for a carpenter are truly tested. You really only have one chance to get it right - screw hole mistakes in the cinderblock dont allow for incremental jambs adjustments. Here is where carpentry meets art you must think and be creative. So the satisfaction of a properly installed door in this case becomes at least for me a real thrill. On the initial site visit to measure up the door youre going to tap on the walls to see if they are drywall or plaster.
I would like to recommend something here for anyone who is thinking about installing a door that will have a high door threshold. Dont do it unless you have another reason that is protecting the area from water snow or something else that would create a bigger problem if you lower the door threshold. Heres what happens to most people. You walk through your home regularly travel about and even go to work without running into these high door thresholds. You come home and subconsciously youre not even thinking about the raised curb and you trip. One trip to the ground could cost you more in medical bills than it would have been to remove and lower the raised door threshold.
Some manufacturers have now manufactured plastic covers to protect their exact thresholds dimensions and include the covers with the complete door unit. There are other pre-molded protectors available from online suppliers of temporary protection products. There are also a variety of tapes that can be used for threshold protection. Currently the best tape on the market T-X268 is a specialty tape that combines UV chemicals in both the tape and adhesive so it wont break down with ultra violet light. There are additional tapes available for sill protection as well including those made with blue polyvinylchloride.
This calculation is based on the specification of the double glazing together with the profile design and dimensions to determine the insulation benefits of the door measured in U-values with the lower the value the better the insulation achieved. The minimum acceptable under current building regulations for replacement doors is a 1.8 U-value but some local authorities will insist on lower values particularly for new build extensions. 2. GLASS SIGHT LINES Another important consideration should be the sight line or width of door profiles between each panel of the folding sliding door as this will affect the visible glass area available when the door is in the closed position. Most bifold doors are designed with dedicated profiles to minimise these sightlines as much as possible but some timber and many upvc folding doors use wide chunky profiles that produce very broad sight lines in excess of 200mm wide that will ultimately spoil your view.
With the rough opening clean and prepped for the new door and jamb move the system into place as one with door hung on hinges. Temporarily shim the side jambs tight top and bottom ends in the rough opening. Temporary shims at the bottom hinge may also be required to straighten door sag. The top hinge will sag just be aware that you will compensate for it later with shims and a screw to snug it when the door is installed permanently. Use of a level isnt necessary just align the jambs flush with the interior plaster and shift shims to square the door in the jambs with even spacing reveal.