Door Threshold / September 15, 2018 / Leala Melanson
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.
They are known to flake and chip when exposed to sunlight and are often cited for creating more work than the protection provided. These low quality 2 or 3 mil. tapes often leave a sticky adhesive residue on thresholds as the adhesive used in the tapes softens in warm temperatures. Another option is to use fitted threshold protection made from molded plastic. The molded plastic threshold protectors are designed to protect the most common types of thresholds in residential or commercial construction. They are the most durable type of threshold protection and can be used for multiple projects.
Buying a cheap bifold door may prove a disappointment unless you check carefully that the door you are buying will meet your needs and expectations before you order. Threshold ramps are designed to help you get over a small dip or rise. They work great for power scooters or wheelchairs as they allow you to span doorway thresholds or small steps that may otherwise would have an abrupt height gain or drop. These ramps can be fixed in place or portable. If you have an electric mobility scooter it is a good idea to have a threshold ramp. Even a 1-inch dip or rise can pose a significant barrier and could result in injury if traversed.