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	<title>Modified Bitumen Roofing - Revision history</title>
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	<updated>2026-04-26T15:45:41Z</updated>
	<subtitle>Revision history for this page on the wiki</subtitle>
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		<id>https://roofs.wiki/index.php?title=Modified_Bitumen_Roofing&amp;diff=174&amp;oldid=prev</id>
		<title>Maintenance script: GEO optimization: question-based headings, citable definitions, FAQ sections</title>
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		<updated>2026-02-19T17:42:46Z</updated>

		<summary type="html">&lt;p&gt;GEO optimization: question-based headings, citable definitions, FAQ sections&lt;/p&gt;
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				&lt;td colspan=&quot;2&quot; style=&quot;background-color: #fff; color: #202122; text-align: center;&quot;&gt;← Older revision&lt;/td&gt;
				&lt;td colspan=&quot;2&quot; style=&quot;background-color: #fff; color: #202122; text-align: center;&quot;&gt;Revision as of 17:42, 19 February 2026&lt;/td&gt;
				&lt;/tr&gt;&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot; id=&quot;mw-diff-left-l1&quot;&gt;Line 1:&lt;/td&gt;
&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot;&gt;Line 1:&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;= Modified Bitumen Roofing =&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;= Modified Bitumen Roofing =&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;br&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;br&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;−&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;'''Modified Bitumen Roofing''' is a &lt;del style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;multi&lt;/del&gt;-&lt;del style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;layered, &lt;/del&gt;asphalt&lt;del style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;-based roofing &lt;/del&gt;system &lt;del style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;designed &lt;/del&gt;for &lt;del style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;use on &lt;/del&gt;[[Flat Roofs]] and low-slope buildings. &lt;del style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;It &lt;/del&gt;combines &lt;del style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;traditional &lt;/del&gt;[[Built-Up Roofing]] &lt;del style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;technology &lt;/del&gt;with modern polymer technology&lt;del style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;, making it one of the most durable and reliable systems &lt;/del&gt;for &lt;del style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;both [[Commercial Roofing]] and certain [[Residential Roofing]] applications&lt;/del&gt;.&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;+&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;'''Modified Bitumen Roofing''' is a &lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;polymer&lt;/ins&gt;-&lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;reinforced &lt;/ins&gt;asphalt &lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;membrane &lt;/ins&gt;system for [[Flat Roofs]] and low-slope buildings&lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;, costing $4–$8 per square foot installed with a lifespan of 20–30 years. Two primary types exist: SBS (styrene-butadiene-styrene) membranes, which offer rubber-like flexibility ideal for cold climates with temperatures down to -40°F, and APP (atactic polypropylene) membranes, which provide superior heat resistance for warm climates&lt;/ins&gt;. &lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;Modified bitumen &lt;/ins&gt;combines &lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;the proven multi-layer waterproofing of &lt;/ins&gt;[[Built-Up Roofing]] with modern polymer technology for &lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;enhanced performance&lt;/ins&gt;.&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;br&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;br&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;−&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&lt;del style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;Modified &lt;/del&gt;bitumen &lt;del style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;membranes are reinforced with modifiers like SBS (styrene-butadiene-styrene) or APP (atactic polypropylene) to improve flexibility, weather resistance, and longevity.&lt;/del&gt;&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;+&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;= What are the key features of modified &lt;/ins&gt;bitumen &lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;roofing? &lt;/ins&gt;=&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;−&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt; &lt;/div&gt;&lt;/td&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-side-added&quot;&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;−&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&lt;del style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;= Key Features &lt;/del&gt;=&lt;/div&gt;&lt;/td&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-side-added&quot;&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;br&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;br&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;* Multi-ply membrane system for enhanced waterproofing&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;* Multi-ply membrane system for enhanced waterproofing&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot; id=&quot;mw-diff-left-l12&quot;&gt;Line 12:&lt;/td&gt;
&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot;&gt;Line 10:&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;* Suitable for buildings requiring a strong, long-lasting low-slope solution&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;* Suitable for buildings requiring a strong, long-lasting low-slope solution&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;br&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;br&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;−&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;= &lt;del style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;Types &lt;/del&gt;of &lt;del style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;Modified Bitumen &lt;/del&gt;=&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;+&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;= &lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;What are the types &lt;/ins&gt;of &lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;modified bitumen? &lt;/ins&gt;=&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;br&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;br&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;== SBS (Styrene-Butadiene-Styrene) ==&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;== SBS (Styrene-Butadiene-Styrene) ==&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot; id=&quot;mw-diff-left-l24&quot;&gt;Line 24:&lt;/td&gt;
&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot;&gt;Line 22:&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;* More rigid, ideal for warmer climates and UV exposure&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;* More rigid, ideal for warmer climates and UV exposure&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;br&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;br&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;−&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;= &lt;del style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;Installation Methods &lt;/del&gt;=&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;+&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;= &lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;How is modified bitumen roofing installed? &lt;/ins&gt;=&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;br&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;br&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;* '''Torch-Applied''': Membrane is heated with a torch to bond with the substrate&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;* '''Torch-Applied''': Membrane is heated with a torch to bond with the substrate&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot; id=&quot;mw-diff-left-l71&quot;&gt;Line 71:&lt;/td&gt;
&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot;&gt;Line 69:&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;* Check for ponding water, granule loss, or seam splits&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;* Check for ponding water, granule loss, or seam splits&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;br&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;br&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;−&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;= &lt;del style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;Internal Links for Further Exploration &lt;/del&gt;=&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;+&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;= &lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;Related Resources &lt;/ins&gt;=&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;br&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;br&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;* [[Flat Roofs]]&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;* [[Flat Roofs]]&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;

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&lt;/table&gt;</summary>
		<author><name>Maintenance script</name></author>
	</entry>
	<entry>
		<id>https://roofs.wiki/index.php?title=Modified_Bitumen_Roofing&amp;diff=108&amp;oldid=prev</id>
		<title>Maintenance script: Add Category:Roofing_Materials tag</title>
		<link rel="alternate" type="text/html" href="https://roofs.wiki/index.php?title=Modified_Bitumen_Roofing&amp;diff=108&amp;oldid=prev"/>
		<updated>2026-02-13T20:44:12Z</updated>

		<summary type="html">&lt;p&gt;Add Category:Roofing_Materials tag&lt;/p&gt;
&lt;table style=&quot;background-color: #fff; color: #202122;&quot; data-mw=&quot;interface&quot;&gt;
				&lt;col class=&quot;diff-marker&quot; /&gt;
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				&lt;tr class=&quot;diff-title&quot; lang=&quot;en&quot;&gt;
				&lt;td colspan=&quot;2&quot; style=&quot;background-color: #fff; color: #202122; text-align: center;&quot;&gt;← Older revision&lt;/td&gt;
				&lt;td colspan=&quot;2&quot; style=&quot;background-color: #fff; color: #202122; text-align: center;&quot;&gt;Revision as of 20:44, 13 February 2026&lt;/td&gt;
				&lt;/tr&gt;&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot; id=&quot;mw-diff-left-l85&quot;&gt;Line 85:&lt;/td&gt;
&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot;&gt;Line 85:&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;* [[Energy Efficiency]]&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;* [[Energy Efficiency]]&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;* [[Roof Repair vs Replacement]]&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;* [[Roof Repair vs Replacement]]&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-side-deleted&quot;&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;+&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;[[Category:Roofing_Materials]]&lt;/ins&gt;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;

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&lt;/table&gt;</summary>
		<author><name>Maintenance script</name></author>
	</entry>
	<entry>
		<id>https://roofs.wiki/index.php?title=Modified_Bitumen_Roofing&amp;diff=32&amp;oldid=prev</id>
		<title>Roofswiki: Created page with &quot;= Modified Bitumen Roofing =  '''Modified Bitumen Roofing''' is a multi-layered, asphalt-based roofing system designed for use on Flat Roofs and low-slope buildings. It combines traditional Built-Up Roofing technology with modern polymer technology, making it one of the most durable and reliable systems for both Commercial Roofing and certain Residential Roofing applications.  Modified bitumen membranes are reinforced with modifiers like SBS (styrene-buta...&quot;</title>
		<link rel="alternate" type="text/html" href="https://roofs.wiki/index.php?title=Modified_Bitumen_Roofing&amp;diff=32&amp;oldid=prev"/>
		<updated>2025-05-28T20:21:07Z</updated>

		<summary type="html">&lt;p&gt;Created page with &amp;quot;= Modified Bitumen Roofing =  &amp;#039;&amp;#039;&amp;#039;Modified Bitumen Roofing&amp;#039;&amp;#039;&amp;#039; is a multi-layered, asphalt-based roofing system designed for use on &lt;a href=&quot;/Flat_Roofs&quot; title=&quot;Flat Roofs&quot;&gt;Flat Roofs&lt;/a&gt; and low-slope buildings. It combines traditional &lt;a href=&quot;/Built-Up_Roofing&quot; title=&quot;Built-Up Roofing&quot;&gt;Built-Up Roofing&lt;/a&gt; technology with modern polymer technology, making it one of the most durable and reliable systems for both &lt;a href=&quot;/Commercial_Roofing&quot; title=&quot;Commercial Roofing&quot;&gt;Commercial Roofing&lt;/a&gt; and certain &lt;a href=&quot;/Residential_Roofing&quot; title=&quot;Residential Roofing&quot;&gt;Residential Roofing&lt;/a&gt; applications.  Modified bitumen membranes are reinforced with modifiers like SBS (styrene-buta...&amp;quot;&lt;/p&gt;
&lt;p&gt;&lt;b&gt;New page&lt;/b&gt;&lt;/p&gt;&lt;div&gt;= Modified Bitumen Roofing =&lt;br /&gt;
&lt;br /&gt;
'''Modified Bitumen Roofing''' is a multi-layered, asphalt-based roofing system designed for use on [[Flat Roofs]] and low-slope buildings. It combines traditional [[Built-Up Roofing]] technology with modern polymer technology, making it one of the most durable and reliable systems for both [[Commercial Roofing]] and certain [[Residential Roofing]] applications.&lt;br /&gt;
&lt;br /&gt;
Modified bitumen membranes are reinforced with modifiers like SBS (styrene-butadiene-styrene) or APP (atactic polypropylene) to improve flexibility, weather resistance, and longevity.&lt;br /&gt;
&lt;br /&gt;
= Key Features =&lt;br /&gt;
&lt;br /&gt;
* Multi-ply membrane system for enhanced waterproofing&lt;br /&gt;
* Resists foot traffic, UV damage, and harsh weather&lt;br /&gt;
* Can be applied with various methods: torch, cold adhesive, or self-adhered&lt;br /&gt;
* Suitable for buildings requiring a strong, long-lasting low-slope solution&lt;br /&gt;
&lt;br /&gt;
= Types of Modified Bitumen =&lt;br /&gt;
&lt;br /&gt;
== SBS (Styrene-Butadiene-Styrene) ==&lt;br /&gt;
* Rubber-modified asphalt offering superior flexibility and cold-weather performance&lt;br /&gt;
* Typically installed with cold adhesives, hot asphalt, or torch-down methods&lt;br /&gt;
* Excellent elongation and crack resistance&lt;br /&gt;
&lt;br /&gt;
== APP (Atactic Polypropylene) ==&lt;br /&gt;
* Plastic-modified asphalt offering better heat resistance&lt;br /&gt;
* Usually torch-applied&lt;br /&gt;
* More rigid, ideal for warmer climates and UV exposure&lt;br /&gt;
&lt;br /&gt;
= Installation Methods =&lt;br /&gt;
&lt;br /&gt;
* '''Torch-Applied''': Membrane is heated with a torch to bond with the substrate&lt;br /&gt;
* '''Cold-Adhered''': Adhesives are used instead of open flame—ideal for sensitive buildings&lt;br /&gt;
* '''Hot-Mopped''': Hot asphalt used to secure layers, similar to [[Built-Up Roofing]]&lt;br /&gt;
* '''Self-Adhered''': Membranes with peel-and-stick backing for flame-free, low-odor installation&lt;br /&gt;
&lt;br /&gt;
= Advantages of Modified Bitumen =&lt;br /&gt;
&lt;br /&gt;
* '''Durability''': Typically lasts 20–30 years with proper [[Roof Inspection and Maintenance]]&lt;br /&gt;
* '''Weather Resistance''': Performs well in both hot and cold climates&lt;br /&gt;
* '''Versatility''': Available in smooth or granule-surfaced membranes&lt;br /&gt;
* '''Repairability''': Damaged sections can be patched easily&lt;br /&gt;
* '''Energy Options''': Available with reflective cap sheets for [[Cool Roofs]] and [[Energy Efficiency]]&lt;br /&gt;
&lt;br /&gt;
= Ideal Applications =&lt;br /&gt;
&lt;br /&gt;
* Warehouses, retail centers, office buildings, and schools&lt;br /&gt;
* Structures requiring robust waterproofing and impact resistance&lt;br /&gt;
* Facilities needing reinforcement for rooftop traffic or equipment&lt;br /&gt;
&lt;br /&gt;
= Comparison with Other Systems =&lt;br /&gt;
&lt;br /&gt;
== vs [[TPO Roofing]] ==&lt;br /&gt;
* TPO is a single-ply membrane, while modified bitumen is multi-ply&lt;br /&gt;
* TPO offers greater reflectivity, but modified bitumen provides better puncture resistance&lt;br /&gt;
&lt;br /&gt;
== vs [[EPDM Roofing]] ==&lt;br /&gt;
* EPDM is rubber-based and typically ballasted or adhered; modified bitumen is more durable under mechanical stress&lt;br /&gt;
&lt;br /&gt;
== vs [[Built-Up Roofing]] ==&lt;br /&gt;
* Modified bitumen is factory-made for consistency; BUR is built layer-by-layer on-site&lt;br /&gt;
* MB is typically lighter and quicker to install&lt;br /&gt;
&lt;br /&gt;
= Environmental Considerations =&lt;br /&gt;
&lt;br /&gt;
* May include recycled content&lt;br /&gt;
* Granule-surfaced options reduce heat absorption and qualify as [[Cool Roofs]]&lt;br /&gt;
* Cold-applied and self-adhered versions minimize fumes and on-site emissions&lt;br /&gt;
* May contribute to [[LEED Certification]] points depending on material and insulation&lt;br /&gt;
&lt;br /&gt;
= Maintenance Tips =&lt;br /&gt;
&lt;br /&gt;
* Schedule routine inspections, especially after extreme weather&lt;br /&gt;
* Seal flashings and penetrations as needed&lt;br /&gt;
* Check for ponding water, granule loss, or seam splits&lt;br /&gt;
&lt;br /&gt;
= Internal Links for Further Exploration =&lt;br /&gt;
&lt;br /&gt;
* [[Flat Roofs]]&lt;br /&gt;
* [[Built-Up Roofing]]&lt;br /&gt;
* [[TPO Roofing]]&lt;br /&gt;
* [[EPDM Roofing]]&lt;br /&gt;
* [[Cool Roofs]]&lt;br /&gt;
* [[Roof Inspection and Maintenance]]&lt;br /&gt;
* [[Commercial Roofing]]&lt;br /&gt;
* [[Residential Roofing]]&lt;br /&gt;
* [[Roofing Materials]]&lt;br /&gt;
* [[LEED Certification]]&lt;br /&gt;
* [[Energy Efficiency]]&lt;br /&gt;
* [[Roof Repair vs Replacement]]&lt;/div&gt;</summary>
		<author><name>Roofswiki</name></author>
	</entry>
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