PVC Foam Door Frame Size Calculator

Opening width (enter smallest value]

Opening height (enter smallest value]

Wall thickness (enter thickest value]

Is there a threshold where you plan to install it?

yes no

Where is the handle located on the inside of the door where it will be installed?

Right Left

Please check.

To prevent pinching during door frame installation, the dimensions of the opening must be entered based on measurements taken at multiple points—top, middle, and bottom—of the narrowest point.
When measuring wall thickness, you must include the thickness of any additional finishing materials, such as gypsum board or tile, to calculate the accurate door frame width (Bar] that allows the door trim molding to adhere tightly to the wall.
It is a standard construction guideline at the site to secure a construction clearance of about 5 to 10 mm between the opening and the door frame for vertical and horizontal adjustment and urethane foam filling.
For bathroom door frames, you must select a bar size that is about 30 to 40 mm wider than a standard door frame, taking into account the thickness of the inner tile finish, so that the tile surface and the door frame surface align neatly.
Since the final height varies depending on the type of floor finishing material (wood, vinyl], when installing a threshold-free type, please be sure to check the final floor finish line (FL] in advance before placing an order.

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PVC Foam Door Frame Ordering Calculator, Guide to Fail-Proof Door Frame Replacement Sizes and Wall Thickness Measurements

The door frame is the critical point where the wall thickness meets the finishing material. We accurately calculate manufacturing specifications based on on-site opening dimensions and ensure error-free door installation by taking into account construction clearances and grouting spaces. Start placing a perfect order with smart calculations!

Door Frame Manufacturing Size Calculation Formula

Since the door frame is manufactured to be slightly smaller than the hole (opening] in the wall and fitted in, it is essential to secure 'grouting space (clearance]' for vertical and horizontal adjustments.

Calculation of Order Width

Door frame width = Opening width - (Left clearance + Right clearance]

Subtract a margin from both sides (usually 5 to 10 mm on each side, totaling 10 to 20 mm] from the width of the opening. On-site, this is called 'deduri' or 'asobi'.

Calculation of Order Height

Door frame height (with threshold] = Opening height - 10mm, Door frame height (without threshold] = Opening height - Flooring clearance - 5mm

The method of calculating the height varies depending on the presence or absence of a threshold, and it is very important to check the final floor finish line (FL] when installing a threshold-free structure.

Detailed Guide to Calculator Input Items

To calculate the exact order specifications, please enter the following measurements in mm.

1. Opening width
It is the horizontal distance between walls. Since the vertical alignment may not be perfect, the narrowest point is used as the reference.
2. Height of the opening
It is the height from the floor to the top of the opening. It is based on the narrowest point.
3. Wall thickness
This is the final thickness including double-sided finishing materials such as gypsum board and tiles in addition to the frame thickness.
4. Presence or absence of a threshold
It is whether a base frame (dishwashing table/door threshold] is required. Bathrooms are usually included, while living room doors tend to be excluded.
5. Door opening direction
Determines the direction (left/right] where the handle will be positioned when viewed from the inside of the door.

Door Frame Installation Standard Specifications (Recommended Values]

These are standard specifications based on general residential construction practices. Please determine the door frame width (bar] to match the thickness of the partition wall.

Applicable to	Standard door frame width (Bar]	Recommended opening clearance	Remarks (Field Terms]
General visit (wallpapering]	110mm ~ 155mm	20mm	Partition wall (stud] thickness standards
Bathroom door frame (tile]	155mm ~ 195mm	15mm	Caution regarding increased thickness when overlaying tiles

note.

The wall thickness and the door frame width (bar] must match exactly to ensure the door trim molding does not lift and provides a clean finish.

Essential Checklist for Fail-Free Construction

This is a checklist to prevent 'size errors' that frequently occur at construction sites.

Law of Three-Point Measurement
Measure the width at the top, middle, and bottom, and the height at the left, right, and center. You must enter the smallest value to prevent the door frame from getting stuck in the opening.
Pre-reflecting finishing material thickness
If the structure is currently in its framed state, you must add the thickness of future finishing materials, such as gypsum board (9.5T/12.5T], tiles, and wallpaper, to the wall thickness when placing an order to enable the installation of door frame molding.
Securing space for urethane foam filling
A gap of about 5 to 10 mm between the opening and the door frame is appropriate. If it is too narrow, the polyurethane foam gun nozzle will not fit, resulting in defects in thermal insulation and soundproofing.
Using a laser level
If the floor is not level, the bottom of the door may catch on the floor during threshold-free installation, so please check the floor finish line (FL] in advance.

Frequently Asked Questions (FAQ]

Q. When measuring openings (frames], the values vary slightly depending on the location. What should I input?
A. You must measure the top, middle, and bottom (horizontal] and left and right (vertical] respectively and enter the smallest value among them. This is because the wall may be slightly warped. The final production size is the value obtained by subtracting approximately 5 to 10 mm of installation allowance (urethane foam space] for vertical and horizontal adjustment from the smallest value.

Q. Do you install the door frames first, or the flooring?
A. Generally, door frames are erected first, and then floor screeding or flooring is installed to match that height. For this reason, calculating the final floor height is very important.

Q. Why are bathroom door frames ordered to be thicker?
A. This is because the thickness of the tiles and adhesive is added to the inside of the bathroom. To align the tiled surface with the door frame, select a bar that is approximately 30 to 40 mm wider than a standard door.