JAS Timber

4" Internal Door Casing Set - 30" Trenched Head (ex 38x100mm - finished size 32x94mm) *Softwood*

100mm Internal Door Casing
  • 100mm Internal Door Casing
  • Internal Door Casings
  • DCW 100 38x100 Casing
Product code 17010020-100mm-Internal-Casing
  • £9.50
  • £11.40

4" Internal Door Casing Set - (30" Trenched Head)
- 94mm Lining Size *Redwood Softwood Timber* -
3 Loose lengths of rebated softwood casing;

Machined from Joinery quality PEFC Certified Fifth Swedish Redwood; We can provide Chain of Custody certification CoC, if required - poa

- 100mm Internal Casing Sets in Stock - 01­/11/2018 -
- The measured overall width has been between 93mm & 95mm but can vary from batch to batch - Sizes measured as at - 01/06/2016 -

- Contact us if this size is critical -

- We can cut these Casings in our workshop to a specific width up to 93mm -
- Select the cutting option in the Drop-down menu, and put the width you require in the Specials Instruction Box -

4" Redwood Casing is a natural product - variations in knots, colour and grain should be expected - They are not defects.


- We also sell this 4 Inch Internal Casings in loose lengths and other sizes of Internal Door Casings, Firecheck Door Casings & External Door Casings : JAS Door Casing Range

4 inch Internal Door Casings are machined from 38x100mm Fifth Swedish Redwood (Softwood), polythene shrink-wrapped as a loose set;

(These may be supplied by different suppliers who can have slightly differing specifi­cations.)

2 @ 78-3/4" legs, 1 @ 34" head: trenched for 30" doors - (Sometimes, an 1/8" or so is given for clearance - Varies by supplier.)
- can be re-trenched for narrower doors;
(2 @ 2 Metres,  1 @ 870mm head trenched for 762mm doors.)
Finished section: 3-3/4" x 1-1/4" & rebated: 1-1/2" x 1/2".
( 93 to 95mm x 32mm finished size, with 38x12mm rebate size.)
Used in partitions made from 3x2 scant + 2 x 9mm plaster­boards.

4x1.5" Planed Timber Internal Casing should be treated and fixed in place as soon as possible to help minimise any movement/­twisting and surface checking/­splitting that occurs naturally with changes in moisture content; 4" Softwood Internal Door Casings are not recommended for external use; External use of Moulded Redwood Door Casing is at your own risk - Timber life expectancy is increased with good timber treatment and protective finishing coats. It is better to use pressure treated timbers externally.

- Sizes measured as at - 14/12/2015 -

Sizes are the usual timber nominal size that the 100mm Door Casing is machined from, with a finished size that is generally obtained;
Planed 4x1-1/2" Internal Redwood Door Casing sizes are generally ±1mm on thickness / ±2mm on width, ±6mm cross-cutting tolerance & there may be one splitter saw cut-edge; (Be aware: For a multitude of reasons, size and profile of timber may vary from batch to batch, so it is best to purchase all you need for a job in one go, rather than buying more at a later date.)

We are able to supply certified 4" Moulded Softwood Internal Door Casing with our Chain of Custody Certi­fica­tions, CoC -
JAS Timber CoC Certification - 4 Inch Internal Casings TT-CoC-003944.­150 & 4 Inch Internal Casings BMT-PEFC-1119.­150 - POA


- Check all component dimensions, mouldings, glazing or any other details are correct prior to any work on site;
- JAS Timber cannot be held liable for the consequences of any variation;
- We cannot exchange any Timber Door Casing once work has commenced. Larger orders of 4" Door Casing and Direct Deliveries are supplied as a Special Order.

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Payment - We can now take Debit Card, BACS, Cash, Cheque or Credit Card payment online for 4" Softwood Internal Door Casings
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Van Delivery of 100mm Door Casings on our van, in Blackburn, Lancashire & the North-West, from £5 +vat, or £1 +vat per mile - poa (from: £30 Manchester, £35 Lancaster, £45 Liverpool, £60 Leeds, all +vat;)

The approximate weight of a 4" Internal Door Casing Set is 8Kg, to include packing;
- 4" Internal Door casings can now be purchased online just add to basket - Charged by weight, the shipping charge is shown in the basket;


Carrier Delivery of 100mm Internal Door Frames is possible from £11.40 +vat - up to 10Kg/2.4M., then 50p per Kg;Zone A mainland - poa other zones)
2.4 to 3.0 M. from + £15+vat - poa Anything longer is not suitable unless in pallet quantities; 

(Please tell us the post-code for your enquiry about 94mm Softwood Internal Door Casings, so that we can quote for delivery.)

- The April 2016 Scandinavian Softwood Price List is current - 01­/06/2018 -
- Please phone us at JAS Timber Merchants with any enquiries about 4" Internal Door Frames - 01254 54000


E. & O.E. see T&C - We do try to keep prices and specifi­cations of 100mm Timber Internal Door Casings correct, but mistakes can be made!