MW20 – Masonry Cavity Wall, Door Threshold Detail
Price range: £9.00 through £14.00 + VAT
External masonry cavity wall, insulation below slab, door threshold detail.
Features of this detail: masonry cavity wall, threshold detail, level threshold, foundation, footing, timber door, threshold drain, level access
Update Jun 2022: Improvements to thermal performance to ensure compliance with updated Part L. Minor amendments for updated Building Regulations.
Detailing external door thresholds can be tricky, and we get many requests for door thresholds on the library. Here are some key considerations we usually look out for when designing door thresholds:
Height and Accessibility
The height of the threshold should comply with building regulations to ensure accessibility for all users, including those with mobility impairments.
Weatherproofing
External door thresholds need to be designed to prevent water ingress and draughts. This can be achieved through proper detailing and the use of weatherproofing materials such as damp proof membranes and courses, seals and gaskets.
Material Selection
Choose materials for the threshold that are durable and weather-resistant, such as hardwood, uPVC, or aluminium. Consider the aesthetic and maintenance requirements of the material, as well as its suitability for the specific project location and climate.
Slope and Drainage
Ensure that the threshold is sloped away from the door to encourage water runoff and prevent pooling. Proper drainage is essential to avoid water damage and prolong the lifespan of the threshold and surrounding materials.
Integration with Flooring
Coordinate the design of the door threshold with the surrounding flooring materials to create a seamless transition between indoor and outdoor spaces. Pay attention to the height difference and any potential trip hazards, especially for vulnerable occupants.
Security and Insulation
Incorporate features into the threshold design to enhance security and insulation, such as reinforced locking mechanisms and thermal breaks. These considerations are especially important for external doors leading into living spaces.
Compliance with Building Regulations
Ensure that the design and installation of the door threshold comply with relevant building regulations and standards, including those related to accessibility, fire safety, and thermal performance.
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