Clearview North September 2013 - Issue 142 | Page 32

industrynews

THE BEST MATERIAL FOR SASH WINDOWS
Last month Alan Burgess, MD at Masterframe Windows Ltd, wrote how expectations of conservation officers had changed since the early days of UPVC in the 1970’s. This month he explores materials in a little more detail as they relate to sash windows and the progress the industry has made towards protecting our heritage assets…
“Wood has been used to make sash windows for centuries. Solid oak timbers for ship building and house construction have endured for years, however being a natural product, the wood itself slowly decays so paint, varnish or oils are used to slow this process. Ultra slender bars from the Georgian period cannot be replicated in anything other than timber. Today, because well-seasoned timbers are expensive and hard to come by, engineered timbers or laminated wood is very popular. As the name suggests, the profile is made up from a mixture of woods, the expensive timbers used on the external surfaces ?B6?VW"??f???2&RW6VB??F?R6V?G&R?v???7BF?W6Rv??FV?v??F?w2??&???&WV?&VB6?FRv????rv?F?WGG??"&VG2?&???r?BF?V???F??r??72&?GV7F????b?WF?g&?VBv??F?w2?V?BF?W?6???&V6?R?V?"GW&??rF?RV&?'B?bF?R?7B6V?GW'??7FVV?v??F?w2f?f??6????W2??R7&?GF??2g&??'&??G&VR?B??W2g&??6?WF?v?6??F???FVBF?Rv??F?r&?GV7F???F?&?Vv?F?R??FW"v"?V'2?V6?????r?????2?b7F?F&B?WF?v??F?w2?4?~( ?2?f?"6?6????W6R'V??F??r&??V7G2?f7F?&?W2?BV&?2'V??F??w2?v?f??6??rv2??F????W?G&2v2vVF?W"7G&???r&?v?BWF?F?RV&??s( ?2?v???7B7&?GF??W6VB?V???V?f?"66?v??F?w2F?W??6?F&&?VB?GF?Rv?F?G&?6??B????f?"F?R6???W&6??6V7F?"f?"66V?V?Bv??F?w2??Bv2?v???BWfW&W7Bv??vW&RF?RV&?F?FW'2?b?V???V?f?"F?RF??W7F?26V7F?"?6??B6?V?FW"?V???V?6V7F???2vW&R?FV?f?"6V6??F'?v????r???&????F??"fW'F?6??6?F??r??Bw&GV????6?'?&FVB??F?gV??&W?6V?V?Bv??F?w2'F?7V?&??V"?'?'G2?Bf?"&?W'F?W2F?6V?BF?&?B'V??F??r&??V7G2??V???V??F?W&???'&??V??"6??B?2&VV?W6VB6??6RF?R?c( ?2'WBF?W??gFV?&WV?&VB7V&g&?R?&V6W6R???f???6?VB?V???V?&WV?&VB&?FV7F????f7F?'??VB??F?6VB?7'??2?"?vFW"6?F??w2&?f?FVBw&VB6???W"6???6W2f?"&6??FV7G2?@??7V6?f?W'2?v?F??WBF?RW?V?6R?b6?FR??F??r???FF?F????6???W&6??'V??F??w2?66????2?B??7?F?2?6???&V6?FVBF?R6fWG?&V?Vf?G2?bv??F?w2F?BF?F?( ?B?V??WGv&G2?BF?R?V?F?&V?Vf?G2g&??W?6V??V?BfV?F??F????V&?W6W'2?b66?v??F?w2V?FW'7F??B&?BfV?F??F????2&?f?FVBv?V???v??B??r?V?W'2&RW6VB?B&V6W6R66?W2F???B&?G'VFRg&??F?Rf6R?bF?Rv??F?r?F?W?7F?fW'F?6??6???G&V?6???B'V???F??V???r?v?G2?v??6?vW&R?VgB?"?2f?"d7R??Bv6?( ?BV?F??F?R?B?( ?2F?Bd7R66?v??F?r&?f??W2vW&R??G&?GV6VB?&??"F?F?B?v?GvV?v?B?f???????'G2g&??F?R7FFW2?fR&VV?G&???VB'WB&V?R??G&?GV6VBF?RT?( ?2f?'7Bd7R66?v??F?rBF?R?W??FW"?6R????b?f??r7V?B????F?2F?67W76??rf&??W2&WV?&V?V?G2v?F?F?Rf?&?W"t?2?v???RvV?FVB?w&??fVB?6????v??FRd7Rv?F?7V&RVFvW2?f6RG&??vR6??G2?V?WV?v????r?B'F?f?6??v????r&WGvVV?F?RV??G2??r6VV?2&WGG???"Vff?'B?&6?F?V??Bv27WGF??rVFvRFV6?????w??B6??V?B&R6VV?2F?Rf?'7B&V?7FWF?v&G2&?GV6??rfV?W7G&F???F?B&WF??VBF?RvV?W&?6?&7FW"?b?W&?FvR76WG2?WF?F?B???B?66?v??F?w2vW&R&V??r&?VB?WB?B?V???V??"d266V?V?@????6W'G2vW&R&V??r??7F??VB??F?F?RW??7F??rF??&W"&??g&?W2?FW7G&????r??6?&7FW"F?R&?W'G????76W72?WfW'?'B?bF?R6?V?G'??2W???W2?bF??2FW7G'V7F???????W'2F?F?W?V7BF?RFWF???FW6?v??BV&?6R?77VW2F??fR&VV?6?'FVB?F?F?v??Bf????v??FR?"6???W&VB?&?6VB??B??vV?&v??&'2?WV?6?v?F??W2?v?F?G&F?F????'WGB????FVB66?W2?'V?F?&?Vv???&?2v?F?( ?&V?( ?gW&??GW&R&R??&W&WV?6?FW2f?"v??B66?v??F?w2?v??6???FF?F???F?'V??F??r&Vr6????6R?&FVB?BV???6VB6V7W&?G????Rd7R?W?6V??V?B6???6R?WGG???R66?W2?6??fW&VB7G&v?&'2?BW?G'W6???2v?F?7Ffb&VB??FBF?F?RWF?V?F?6?G??&V??rf?GFVB&V???BF?R?WFW"6????b'&?6?v?&?v?F?6V?V?Bf???WG2???7V?F????BW&??B&6??G&fW2v???V?7W&RF?W?F?R&??6?2f?"?Wrd7R66?v??F?w26W&??W6???B?6?( ?B&?WB?FW&????W2v??B?2v??B???vWfW"6W'F??'V??F??w2&WV?&RF?R7V6??W7F?WF?72F?B????V???V?6??ffW"'WBf?"?R??F??W7F?2??7F??F???2?V?G?d7R66?v??F?r?2( ??F?7F??wV?6?&?Rg&??F??&W"?&?v???( ??F??RvV???6??6W'fF????ff?6W'26???BFV??v?V?66?v??F?w2?fR&VV?6??vVB?3 ??4U#0??F?&VB??&R?f?6?Bwwr?6?V'f?Wr?V??6???